Slot diffusers - · PDF fileSlot diffusers are designed for air supply in rooms with floor to...
Transcript of Slot diffusers - · PDF fileSlot diffusers are designed for air supply in rooms with floor to...
04Round duct diffusersSlot diffusers
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IMP KlimaSlot diffusers, Round duct diffusers
Slot diffusers are designed for air supply in rooms with floor to ceiling heights of 2.5 to 4 m. They are suitable for supplying either cold or warm air, in particular in applications where air conditioning comfort demands are stringent. Due to their high induction rate and rapid decrease of temperature difference, these diffusers are also suitable for variable systems.
Round duct diffusers can be installed at various locations within the duct network. They are suitable for supplying either cold or warm air.
Slot diffusers, Round duct diffusers
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IMP Klima Slot diffusers, Round duct diffusers
Overview
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IMP KlimaSlot diffusers, Round duct diffusers
Slot diffusers
LD-13 LD-14
LD-15
Round duct diffusers
Floor slot diffusers
Panel design slot diffusers
LDP-14
SKD-13D
LD-18
Nozzle diffusers
LD-19 LD-20
LD-16N
� Slot diffusers
Slot diffusers are designed for air supply in rooms with floor to ceiling heights of 2.5 to 4 m. They are suitable for supplying either cold or warm air, in particular in applications where air conditioning com-fort demands are stringent. Due to their high induction rate and rapid decrease of temperature difference, these diffusers are also suitable for variable systems.
� Nozzle diffusers
Nozzle diffusers LD-19 are designed for supply of warm or cold air and can be mounted in the wall or in the ceiling. Adju-stable deflectors allow us to set different directions of air discharge.Nozzle diffusers LD-20 are designed to supply low quantities of air on big window surfaces to prevent condensation (ceiling installation near windows) or for big throws for cooling when wall installation (Coanda effect).
� Panel design slot diffusers
A panel design slot diffuser consists of a face plate and a plenum box. Cylindrical air deflectors, equal to those in LD-13 and LD-14 diffusers, are installed in the slots, to allow continuous adjustment of dischar-ged air direction within the 360° range. On order, diverse plate designs and slot patterns are available.
� Floor slot diffusers
LD-16N floor slot diffusers are a suitable solution for swimming pools and similar rooms with large glass surfaces and windows. They are designed for installati-on in the floor. Warm air is supplied in the upwards direction, towards the window.
� Round duct diffusers
Round duct diffusers can be installed at various locations within the duct network. They are suitable for supplying either cold or warm air.
� Software: KLIMA ADE
LD and SKD Software:• available calculation and graphical
display of air supply for slot diffusers LD-13, LD-14 and LD-15
• available calculation of technical speci-fications for the application of wall- or ceiling-mounted slot diffusers
• available calculation of ceiling-moun-ted multiple-diffuser configuration air supply
• application of vertical or horizontal slot diffuser air supply into the room, depending on the mode of operation – heating or cooling
• the package supports basic air supply mode models for the SKD-13 round duct diffuser
• available calculation of SKD-13 round duct diffusers cooling mode: single-si-de and two-side horizontal supply and alternating horizontal supply heating mode: vertical air supply
Software: Klima ADE
Page
SLOT DIFFUSERS 180
Slot diffusers LD-13, LD-14 180
Slot diffusers LD-15 195
Slot diffusers LD-17, LD-18 199
Nozzle diffusers LD-19 213
Nozzle diffusers LD-20 219
Floor slot diffusers LD-16N 230
Panel design slot diffusers LDP-13, LDP-14 232
ROUND DUCT DIFFUSERS 234
Round duct diffusers SKD-13 234
Content
� Legend of symbols
INOXElement is intended to be built in the floor.
Element is suitable for the supply of warm air (heating).
The element is made of stainless sheet steel AISI 304.
AI Element is made of aluminium profiles, aluminium sheet or aluminium casting.
Element is intended to be built in the wall.
Element is suitable for the supply of cool air (cooling).
St MElement is made of steel sheet. Element is intended to be built in the ceiling or in the wall.
Element allows regulation by electric motor (Belimo electric motors).
RAL9010
FEU...
Element is powder painted in stan-dard RAL 9010 colour. Other desired colour is to be specified in the order.
Element for air conditioning of rooms with floor to ceiling heights room up to 4 m.
Element is intended for air filtration. The filter of class … is built in.
CDShady symbol means possibility of optional material, surface protection, motor version, …
Element for air conditioning of rooms with floor to ceiling heights from 6 to 15 m.
The possibility of the automatic selec-tion and calculation of the technical characteristics of grilles and difusers in regard to the given conditions with the assistance of the Klima ADE program.
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IMP Klima Slot diffusers, Round duct diffusers
AI
RAL9010
CD
12
3
φ D
Ha
B 60
H1
A
9.4
F
8.5
41
15
E
4
5
6
7
LD-1353
8.5
9.4
F
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5
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E
26A
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LD-14
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A
9.4
F
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LD-14
� Slot diffusers LD-13, LD-14
ApplicationLD-13 and LD-14 slot diffusers are designed for the supply of air in rooms with floor to ceiling heights of 2.5 to 4 m for supplying either cold or warm air, in particular in applications where air conditioning comfort demands are stringent. Due to their high induction rate and rapid decrease of temperature difference, these diffusers are also suitable for variable systems.
DescriptionLD-13 and LD-14 slot diffusers are designed in 1, 2, 3 and 4-slot versions. Diffuser face plate consists of anodised aluminium sections with built-in cylindrical deflectors made of plastics. Deflectors allow continuos adjustment of discharged air direction within the 360° range as well as control of supply air flow rate. The cylindrical deflectors also allow full shutting of the diffuser. The slot diffuser plenum box is made of galvanised sheet steel and has a flow rate control damper built in its inlet spigot, to allow fine adjust-ment of the desired air flow rate.
Control schematic of the spigot volume control damper
Slot diffusers
1. Plenum box2. Inlet spigot3. Volume control damper4. Main section5. Cylindrical deflector6. Side lateral section7. Connecting section8. Outside insulation
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IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
LD-14 O/ 1
LD-14 O/ 2
LD-14 O/ 4
LD-14 O/ 3
LD-13 O/ 1
LD-13 O/ 2
LD-13 O/ 3
LD-13 O/ 4
50
96.5
142
187.553
.553
.553
.553
.5142
107
72.5
37.5
41.5
41.5
41.5
41.5
LD-13/ 1
LD-14/ 1
LD-13/ 2 LD-13/ 3 LD-13/ 4
LD-14/ 2 LD-14/ 3 LD-14/ 4
LD-13
No. of slots H H1 B A E F
1 220 261 95 33 57.5 24.4
2 230 271 129 67 92 58.2
3 250 291 162 101 126.5 92.0
4 290 331 196 135 161.5 125.8
LD-13
No. of slots H H1 B A E F
1 233.5 287 106 44 69 35.3
2 253.5 307 150 89 115 80
3 293.5 347 195 133 161.5 124.7
4 318.5 372 240 178 206.5 169.4
Slot diffuser types
• Single-slot (designation LD-13,14/1) • Two slots (designation LD-13,14/2)• Three-slots (designation LD-13,14/3)• Four-slots (designation LD-13,14/4)
Slot diffusers LD-13 O, LD-14 O
Narrow versionThe narrow slot diffuser differs from the conventional slot diffuser construction as regards its mounting to the ceiling or wall. The conventional slot diffuser has a L-cross-section mounting sleeve which remains visible and may, in certain appli-cations, interfere with aesthetic require-ments. The narrow design has eliminated this deficiency as well as introduced improved structural rigidity due to its reinforced sleeve. The product is thus sui-table for installation in cooling suspended ceilings as well.
LD-13, LD-14LD-13 O, LD-14 O
Standard lenghts L
LD-13 and LD-14 slot diffusers are avai-lable in standard lengths ranging from L=300 to L=2000 mm, with a 100 mm step. In cases where longer diffusers are required, they can be joint together by means of (rail-type) connecting plates. Plenum boxes are also available in standard lengths ranging from 300 mm to 2000 mm.
Special orders
On customer’s request slot diffusers can be made in other dimensions. End seals and longitudinal sections are painted in any RAL scale colour according to the customer’s request. As standard, cylindri-cal deflectors are black or white, on the customer’s request, they can be coloured in any RAL scale colour. Non-standard colours and extra components are to be ordered separately.
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IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
300
300
angle 90˚
L/2L/2
J J
Joining diffusers together in length and width
Joining in width (into diffusers with multiple slots) requires special strip sections, while joining in length requires connecting plates (the total length of combined diffusers is not limited).
Cylindrical deflectors
Cylindrical deflectors are an important components of a slot diffuser. They allow adjustment of both air flow rate and direction. Cylindrical deflectors are made of plastics. As standard, they are black or white.
Slot diffuser face plate designs
Slot diffuser face plates are made of linear or angular ended sections, which allow the diffusers to be joined at different angles. Angular ended sections are not fitted with air direction controls.
End seals
End seals are components of the diffuser face plate. They are available in two designs:• as an angle piece (E – on both ends,
ET – on one end only) or • plates (F – on both ends, FT – on one
end only).The connecting strip-section has no end angle pieces or plates seals (designation T).
Number of inlet spigots
Standard length
Position of spigots
1 300 – 1000 L/2
2 1100 – 1500 J = 300
2 1600 – 2000 J = 400
Number and diameter of inlet spigots
L 300 do 1000 1100 do 1500 1600 do 2000
No. of slotsNumber and diameter of inlet spigots
LD-13 LD-14 LD-13 LD-14 LD-13 LD-14
1 1 x 98 1 x 123 2 x 98 2 x 123 2 x 123 2 x 138
2 1 x 138 1 x 158 2 x 123 2 x 138 2 x 138 2 x 158
3 1 x 158 1 x 198 2 x 138 2 x 158 2 x 158 2 x 198
4 1 x 198 1 x 223 2 x 158 2 x 198 2 x 198 2 x 223
Position of inlet spigots
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IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
Installation with a threaded bar (R)
Installation with wire (R) Installation with suspension bracket (P)
Fixing with self-tapping screws (U)
Fixing with spring clamps (S) Fixing with a cross-member (Z)
Installation with special fastening elements (R)
Installation with springs into ducts (N)
Fixing of the plenum box onto LD-13, LD-14 diffusers
• With self-tapping screws (designation U)• With spring clamps (designation S)• With a cross-member (designation Z)
Installation methods
• With a threaded bar (designation R)• With a wire (designation R)• With suspension brackets on the
plenum box (designation P)• With special fixing elements
(designation R)• With springs (designation N)
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IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
c d
gfe
a b
101˚
LD-13
LD-14Standard
(left) Standard(vertical)
Air jet angle 60°(left, right)
Air jet angle 60°(right)
Air jet angle 60°(left)
Standard(left, right)
Standard (right)Discharge direction
Discharge angle
Min
. air
flow
rate
Max
. air
flow
rate
Discharge direction
Discharge angle
Min
. air
flow
rate
Max
. air
flow
rate
Pogled z vrha
1
2
3
Top view
Slot diffuser with actuator controlled discharge directionSlot diffusers with actuator controlled discharge direction are suitable for summer-winter air supply applications. The desired direction of air jet is achieved by means of an electric actuator which moves a slider. Manual adjustment is therefore not necessary. Compared with standard slot diffusers, air flow rate is reduced by 50 %. There are two options for the Belimo electric motors:LH 24A-SR100 and LH-24A-MP100. The first operates at 24V AC/DC, the second within the range of 0-10V or 0-32V. Their travel distance is 100 mm, for which 150 s is required.
Component parts1. Slot diffuser2. Deflector3. Electric actuatorIn case the discharge angle is to be adjustable by means of an electric actuator (winter-summer application), this requirement shall be specified in the ordering form.* Motor version on customer’s request.
Types of air discharge
Every second row1. Adjustment of deflectors for
warm air supply
Every second row2. Adjustment of deflectors for
cold air supply
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IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
Ordering key
Length L=300, 400, 500, …, 2000 (single piece)
Type of air discharge (a, b, c, d, e, f, g)
I5 Thermal insulation (polyethylene), 5 mm thick, on the outside of the plenum boxI9 Sound and thermal insulation (from -40 °C to 105 °C), 9 mm thick, on the outside of the
plenum box (synthetic rubber based material)
I19 Sound and thermal insulation (from -40 °C to 105 °C), 19 mm thick, on the outside of the plenum box (synthetic rubber based material)
N Installation with spring clamps – without plenum box (LD-13 and LD-14 only)P Installation of the plenum box with hangersR Installation with brackets built in the basic section
Z Fixing of the diffuser to the plenum box with a cross-memberS Fixing of the diffuser to the plenum box with spring clampsU Fixing of the diffuser to the plenum box with self-tapping screws
M Volume control damper
K Plenum box
E End sealing on both endsET End sealing on one end
F End plate on both endsFT End plate on one end
T Rail-type without end sealings and plates
B Black deflectorsW White deflectors
1 Number of slots234
LD-13 Slot diffuserLD-14
LD-13 O Narrow slot diffuserLD-14 O
LD-13/1/B/E/K/M/S/P/I/g L=1700
Note:• Please specify the deflector colour in your order. • Standard eloxal colour of the aluminium section is the original aluminium colour. Other colours shall be specified in the order.• For the LD-13 0 and LD-14 0 type, the following end seals are available: F, FT and T.• When installing in cooling ceilings, consult the manufacturer.• In the case the slot diffuser is ordered complete with plenum box, the air jet configuration is set as shown on the drawing on page 184.• Versions with insulation on the inside of the plenum box are also available.
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IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
1’
32
1
4
B1
B
L
H
H2
M1
B2
Wall mounted slot diffusers LD-13S and LD-14S
ApplicationDesigned for installation in plasterboard walls with a thickness of 100 mm or more. These are used for the supply of air in rooms with ceiling heights of 2.5 to 4 m. Suitable for cooling as well as for heating, especially in rooms with elevated comfort requi-rements. They may also be used to discharge the air from the room, and enable a high level of induction.
DescriptionInlet or outlet connection may be in the plenum box above the ventilated room or on the other side of the wall. On the diffuser side, the plenum box is sound-insulated, lowering the level of noise emissions in the ventilated room.
Component parts1. front chamber connection (KF)1’. rear chamber connection (KB)2. slot diffuser LD-13S or LD-14S3. sound insulation4. plenum box
Plenum boxDespite its low height, it assures sufficient air distribution in the direction from the plenum box connection to LD-13 or D-14 across the entire length of the diffuser. It can be installed in plasterboard walls with a minimum thickness of 100 mm. Design allows installation and placement on metal profile brackets of internal plasterboard walls.
Front plenum box connectionFront plenum box connection allows air inlet and outlet above the suspended ceiling of the ventilated room. This assures a certain competitive advantage, as there is no need to adjust the duct network to the diffuser placement.
Rear plenum box connectionRear side connection allows air inlet and outlet through the neighboring room. Due to the height of the connector according to LD-13 o LD-14, the duct network can be placed above the suspended ceiling.
Sound insulationSound insulation has enhanced absorption properties and prevents the spreading of emissions from the duct network into the ventilated room. The insulation placement effectively reduces internal noise generation in the entire plenum box, particularly on the location of the inlet jet through the connection.
H (mm)
H1 (mm)
H2 (mm)
B (mm)
B1 (mm)
B2 (mm)
L (mm)
ΦD (mm)
LD-13S/1 289 203 40 75 58 45 1000 98
LD-14S/1 289 203 74 75 58 45 1000 123
LD-13S/2 289 203 51 75 58 45 1000 138
LD-14S/2 289 203 96 75 58 45 1000 158
Installation in the plasterboard
Dimensions
186
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
Ordering key
Note:• Please specify the deflector colour in your order.• Standard eloxal colour of the aluminium section is the original aluminium colour. Other colours shall be specified in the order.• Versions with insulation on the inside of the plenum box are also available.
LD-13S/1/B/E/K/I5 L =1000
Length
I5 Thermal insulation (polyethylene), 5 mm thick, on the outside of the plenum boxI9 Sound and thermal insulation (from -40 °C to 105 °C), 9 mm thick, on the outside of
the plenum box (synthetic rubber based material)I19 Sound and thermal insulation (from -40 °C to 105 °C), 19 mm thick, on the outside of the
plenum box (synthetic rubber based material)
KF Plenum box, front side connectionKB Plenum box, back side connection
E End sealing on both endsET End sealing on one end
F End plate on both endsFT End plate on one end
T Rail-type without end sealings and plates
B Black deflectorsW White deflectors
1 Number of slots2
S For wall installation
LD-13 Slot diffuser typeLD-14
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IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
1
2
3
4
100 300 500 1000 1200
LD-13
Štev
ilo re
ž
Q(m3/hm)
LD-14
Ax
LL
H1
VH1
∆tH VL∆tL
x xALL
H1
VL
∆tL
VH1
∆tH
VL
∆tL
Nr. o
f slo
ts
Fast selection diagram: LWA < 35 dB(A)
Technical specifications for one-slot diffuser, per meter of lenght, at horizontal discharge
A(m²) Q(m³/h) LWA (dB)
LD-13 0.0092 135 34
LD-14 0.0136 210 28
Definition of symbols
Q (m³/hm) Air flow rate to lengthx (m) Horizontal distance to the wallH (m) Room heightL (m) Throw distance (L=H1+x) VL (m/s) Air velocity at the throw
distance LΔtz (K) Temperature difference betwe-
en the supply and room airΔtL (K) Difference between the core
and room air temperatureΔp (Pa) Pressure dropLWA (dB(A)) Sound power levelvH1 (m/s) Air velocity at the distance H1A, B (m) Distance between diffusers, in
length and in widthH1 (m) Throw distance
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IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
A (m)
V (
m/s
)H1
0.4
0.3
0.25
0.2
0.15
H1 (m)
1 1.2 1.6 2
LD-13 / 1 160 125 110 90 70 55 45
LD-13 / 4 325 250 215 180
LD-13 / 2 230 180 155 125 100LD-13 / 3 280 220 185 155
2 2.5 3 4 5 7 10
LD-13 / 1 160 125 110 90 70 55 45
LD-13 / 4 325 250 215 180
LD-13 / 2 230 180 155 125 100LD-13 / 3 280 220 185 155
L (m)
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V (
m/s
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0.5
0.4
0.30.25
0.2
0.15
0.12 2.5 3 4 5 7 10
2.5
V (
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H1 (m)
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LD-13 / 1 160 125 110 90 70 55 45
LD-13 / 4 395 325 250 215 180
LD-13 / 2 230 180 155 125 100LD-13 / 3 340 280 220 185 155
2.5
0.25
0.20.15
0.1
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V (
m/s
)L
LD-13 / 1 160 125 110 90 70 55 45
LD-13 / 4 395 325 250 215 180
LD-13 / 2 230 180 155 125 100LD-13 / 3 340 280 220 185 155
2.5
0.7
0.5
0.4
0.30.250.2
0.15
0.1
0.052 2.5 3 4 5 7 10
L (m)
(m³/hm) (m³/hm)
(m³/hm) (m³/hm)
Air velocity diagrams for LD-13, at different throw distances
One or two sided horizontal discharge
Alternate sided horizontal discharge
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IFFU
SER
SAI
R D
ISPL
ACEM
ENT
U
NITS
SUPP
LY A
IR N
OZZL
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TER
NAL
ELEM
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AIR
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TING
LO
UVR
ES
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
H1 (m)
1 1.2 1.6 2
LD-14 / 1LD-14 / 2
0. 4
0.3
0.25
0. 2
0.15
2 2.5 3 4 5 7 10
V (
m/s
)H1
V L (m
/s)
2.5
0.8
0.6
0.5
0.4
0.3
0.25
0.2
0.15
0.12 2.5 3 4 5 7 10
H1 (m)
1 1.2 1.6 2
0.30.250.2
0.15
0.1
2.5
LD-14 / 1LD-14 / 2
0.7
0.5
0.4
0.30.25
0.2
0.15
0.1
0.052 2.5 3 4 5 7 10
V (
m/s
)L
2 2.5 3 4 5 7 10
V (
m/s
)H1
A (m)
A (m)
L (m)
L (m)
H1 (m)
1 1.2 1.6 2
LD-14 / 1LD-14 / 2
0. 4
0.3
0.25
0. 2
0.15
2 2.5 3 4 5 7 10
V (
m/s
)H1
V L (m
/s)
2.5
0.8
0.6
0.5
0.4
0.3
0.25
0.2
0.15
0.12 2.5 3 4 5 7 10
H1 (m)
1 1.2 1.6 2
0.30.250.2
0.15
0.1
2.5
LD-14 / 1LD-14 / 2
0.7
0.5
0.4
0.30.25
0.2
0.15
0.1
0.052 2.5 3 4 5 7 10
V (
m/s
)L
2 2.5 3 4 5 7 10
V (
m/s
)H1
A (m)
A (m)
L (m)
L (m)
H1 (m)
1 1.2 1.6 2
LD-14 / 1LD-14 / 2
0. 4
0.3
0.25
0. 2
0.15
2 2.5 3 4 5 7 10
V (
m/s
)H1
V L (m
/s)
2.5
0.8
0.6
0.5
0.4
0.3
0.25
0.2
0.15
0.12 2.5 3 4 5 7 10
H1 (m)
1 1.2 1.6 2
0.30.250.2
0.15
0.1
2.5
LD-14 / 1LD-14 / 2
0.7
0.5
0.4
0.30.25
0.2
0.15
0.1
0.052 2.5 3 4 5 7 10
V (
m/s
)L
2 2.5 3 4 5 7 10
V (
m/s
)H1
A (m)
A (m)
L (m)
L (m)
H1 (m)
1 1.2 1.6 2
LD-14 / 1LD-14 / 2
0. 4
0.3
0.25
0. 2
0.15
2 2.5 3 4 5 7 10
V (
m/s
)H1
V L (m
/s)
2.5
0.8
0.6
0.5
0.4
0.3
0.25
0.2
0.15
0.12 2.5 3 4 5 7 10
H1 (m)
1 1.2 1.6 2
0.30.250.2
0.15
0.1
2.5
LD-14 / 1LD-14 / 2
0.7
0.5
0.4
0.30.25
0.2
0.15
0.1
0.052 2.5 3 4 5 7 10
V (
m/s
)L
2 2.5 3 4 5 7 10
V (
m/s
)H1
A (m)
A (m)
L (m)
L (m)
(m³/hm) (m³/hm)
(m³/hm) (m³/hm)
Air velocity diagrams for LD-14, at different throw distances
One or two sided horizontal discharge
Alternate sided horizontal discharge
190
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
Q (m3/h)
200
100
50
2015
1086
4
3
21.5
1100 150 200 300 400 500 700 1000
20
25
30
35
40
45
50
55
5001000
15002000
L w A (dB(A) )
p
(Pa)
t
Q (m3/h)
200
100
50
20
1086
43
21.5
1100 150 200 300 400 500 700 1000
60
5001000
1500
2000
L w A (dB(A) )
5550
4540
35
30
25
20
15
10t
p (
Pa)
LD 13/1 LD 13/2
Correction factors applicable to LD-13/1
Type of discharge Vertical Horizontal
Flow rate control
damperOpen Closed Open Closed
L=500 x 1 x 1.44 x 0.87 x 1.34
L=1000 x 1 x 3.30 x 0.85 x 3.02
L=1500 x 1 x 5.26 x 0.84 x 4.47
L=2000 x 1 x 7.37 x 0.81 x 5.68
Correction factors applicable to LD-13/2
Type of discharge Vertical Horizontal
Flow rate control
damperOpen Closed Open Closed
L=500 x 1 x 1.91 x 0.86 x 1.79
L=1000 x 1 x 5.91 x 0.70 x 5.31
L=1500 x 1 x 9.88 x 0.58 x 8.67
L=2000 x 1 x 14.10 x 0.47 x 11.99
Sound power level and pressure drop
Example
Q = 150 m³/hL = 1000 mmΔpt = 14 Pa (vertical; damper opened)Δpt = 14 x 3.30 = 46.2 Pa (vertical; damper closed)Δpt = 14 x 0.85 = 11.9 Pa (horizontal; damper opened)Δpt = 14 x 3.02 = 42.3 Pa (horizontal; damper closed)
LWA = 32 dB(A)
Example
Q = 150 m³/hL = 500 mmΔpt = 22 Pa (vertical; damper opened)Δpt = 22 x 1.91 = 42.0 Pa (vertical; damper closed)Δpt = 22 x 0.86 = 18.9 Pa (horizontal; damper opened)Δpt = 22 x 1.79 = 39.4 Pa (horizontal; damper closed)
LWA = 30 dB(A)
191
VENT
ILAT
ING
GRIL
LES,
VE
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ATIN
G VA
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VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
CIRC
ULA
R D
IFFU
SER
S,
SQUA
RE
DIF
FUSE
RS
SWIR
L D
IFFU
SER
S,
VAR
IAB
LE S
WIR
L
DIF
FUSE
RS
SLOT
DIF
FUSE
RS,
RO
UND
DU
CT D
IFFU
SER
SAI
R D
ISPL
ACEM
ENT
U
NITS
SUPP
LY A
IR N
OZZL
ESEX
TER
NAL
ELEM
ENTS
AIR
FLO
W
CONT
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UNI
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SOU
ND A
TTEN
UATO
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TING
LO
UVR
ES
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
200
100
50
20
1086
43
21.5
1
500
1000
1500
2000
L w A (dB(A) )
10
Q (m3/h)100 150 200 300 400 500 700 1000
15
20
25
30
35
4045
5060
70
75
p
(Pa)
t
200
100
50
20
1086
43
21.5
1
500
1000
1500
2000
L w A (dB(A) )
10
15
20
25
30
35
40
45
5055
Q (m 3/h)100 150 200 300 400 500 700 1000
p
(Pa)
t
Correction factors applicable to LD-13/3
Type of discharge Vertical Horizontal
Flow rate control
damperOpen Closed Open Closed
L=500 x 1 x 2.37 x 0.84 x 2.24
L=1000 x 1 x 8.52 x 0.56 x7.59
L=1500 x 1 x 14.50 x 0.32 x 12.86
L=2000 x 1 x 20.82 x 0.18 x 18.29
Correction factors applicable to LD-13/4
Type of discharge Vertical Horizontal
Flow rate control
damperOpen Closed Open Closed
L=500 x 1 x 3.08 x 0.70 x 2.91
L=1000 x 1 x 11.07 x 0.47 x 9.87
L=1500 x 1 x 18.85 x 0.27 x 16.72
L=2000 x 1 x 27.07 x 0.15 x 23.78
Sound power level and pressure drop
Example
Q = 300 m³/hL = 1000 mmΔpt = 15 Pa (vertical; damper opened)Δpt = 15 x 8.52 = 127.8 Pa (vertical; damper closed)Δpt = 15 x 0.56 = 8.4 Pa (horizontal; damper opened)Δpt = 15 x 7.59 = 113.8 Pa (horizontal; damper closed)
LWA = 29 dB(A)
Example
Q = 300 m³/hL = 500 mmΔpt = 35 Pa (vertical; damper opened)Δpt = 35 x 3.08 = 107.8 Pa (vertical; damper closed)Δpt = 35 x 0.70 = 24.5 Pa (horizontal; damper opened)Δpt = 35 x 2.91 = 101.8 Pa (horizontal; damper closed)
LWA = 33 dB(A)
LD 13/3 LD 13/4
192
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
200
100
50
20
10
6
4
2
1.5
1
5001000
1500
2000
p
(Pa)
t
L w A (dB(A) )
15
Q (m 3/h)100 150 200 300 400 500 700 1000
20
25
30
3540
45
50
8
3
200
100
50
20
108
6
43
2
1.5
1
500
1000
1500
2000
p
(Pa)
t
L w A (dB(A
) )
15
Q (m 3/h)100 150 200 300 400 500 700 1000
20
25
30
35
4045
50
Sound power level and pressure drop
Correction factors applicable to LD-14/1
Type of discharge Vertical Horizontal
Flow rate control
damperOpen Closed Open Closed
L=500 x 1 x 1.81 x 0.76 x 1.31
L=1000 x 1 x 3.83 x 0.42 x 3.23
L=1500 x 1 x 5.80 x 0.28 x 5.11
L=2000 x 1 x 7.87 x 0.19 x 7.07
Correction factors applicable to LD-14/2
Type of discharge Vertical Horizontal
Flow rate control
damperOpen Closed Open Closed
L=500 x 1 x 2.11 x 0.53 x 1.59
L=1000 x 1 x 8.84 x 0.29 x 7.96
L=1500 x 1 x 15.36 x 0.20 x 14.14
L=2000 x 1 x 22.32 x 0.14 x 20.70
LD 14/2LD 14/1
Example
Q = 300 m³/hL = 1000 mmΔpt = 33 Pa (vertical; damper opened)Δpt = 33 x 3.83 = 126.4 Pa (vertical; damper closed)Δpt = 33 x 0.42 = 14.0 Pa (horizontal; damper opened)Δpt = 33 x 3.23 = 107.0 Pa (horizontal; damper closed)
LWA = 38 dB(A)
Example
Q = 300 m³/hL = 500 mmΔpt = 47 Pa (vertical; damper opened)Δpt = 47 x 2.11 = 99.2 Pa (vertical; damper closed)Δpt = 47 x 0.53 = 24.9 Pa (horizontal; damper opened)Δpt = 47 x 1.59 = 74.7 Pa (horizontal; damper closed)
LWA = 36 dB(A)
193
VENT
ILAT
ING
GRIL
LES,
VE
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ATIN
G VA
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VENT
ILAT
ING
GRIL
LES,
VE
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ATIN
G VA
LVES
CIRC
ULA
R D
IFFU
SER
S,
SQUA
RE
DIF
FUSE
RS
SWIR
L D
IFFU
SER
S,
VAR
IAB
LE S
WIR
L
DIF
FUSE
RS
SLOT
DIF
FUSE
RS,
RO
UND
DU
CT D
IFFU
SER
SAI
R D
ISPL
ACEM
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U
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SUPP
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OZZL
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UNI
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TING
LO
UVR
ES
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
200
100
50
20
1086
43
2
1.5
1
500
1000
1500
2000
p
(Pa)
t
15
Q (m3/h)100 150 200 300 400 500 700 1000
L w A (dB(A ) )
20
25
30
35
4045
50
200
100
50
20
1086
43
21.5
1
500
1000
1500
2000
p
(Pa)
t
L w A (dB(A) )
15
Q (m 3/h)100 150 200 300 400 500 700 1000
520
25
30
35
40
Sound power level and pressure drop
Correction factors applicable to LD-14/3
Type of discharge Vertical Horizontal
Flow rate control
damperOpen Closed Open Closed
L=500 x 1 x 2.41 x 0.33 x 1.87
L=1000 x 1 x 13.86 x 0.19 x 12.69
L=1500 x 1 x 24.92 x 0.16 x 23.17
L=2000 x 1 x 36.76 x 0.13 x 31.33
Correction factors applicable to LD-14/4
Type of discharge Vertical Horizontal
Flow rate control
damperOpen Closed Open Closed
L=500 x 1 x 3.14 x 0.28 x 2.43
L=1000 x 1 x 18.02 x 0.15 x 16.50
L=1500 x 1 x 32.34 x 0.13 x 28.12
L=2000 x 1 x 47.79 x 0.10 x 39.63
LD 14/3 LD 14/4
Example
Q = 600 m³/hL = 1000 mmΔpt = 18 Pa (vertical; damper opened)Δpt = 18 x 13.86 = 249.5 Pa (vertical; damper closed)Δpt = 18 x 0.19 = 3.4 Pa (horizontal; damper opened)Δpt = 18 x 12.69 = 228.4 Pa (horizontal; damper closed)
LWA = 38 dB(A)
Example
Q = 600 m³/hL = 500 mmΔpt = 70 Pa (vertical; damper opened)Δpt = 70 x 3.14 = 219.8 Pa (vertical; damper closed)Δpt = 70 x 0.28 = 19.6 Pa (horizontal; damper opened)Δpt = 70 x 2.43 = 170.1 Pa (horizontal; damper closed)
LWA = 36 dB(A)
194
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
AI
RAL9010
CD
41
205
15
7.5
147
80
φ78
60
4
3
2
1
Installation openings: 15 x L (diffuser length)
Joining slot diffusers together in length
� Slot diffuser LD-15
ApplicationSlot diffuser LD-15 is designed to supply air in rooms with floor to ceiling heights from 2.5 to 4 m. They are primarily desi-gned for the supply of cold air in applicati-ons with high comfort demands.
DescriptionLD-15 slot diffuser is of a one-slot con-struction. The diffuser face plate consi-sts of aluminium sections with built-in cylindrical deflectors made of recycled plastics. Individually adjustable deflectors allow continuous adjustment of discharge angle within the 360° range, as well as adjustment of air flow rate. The diffuser air flow can be completely shut by means of the cylindrical deflectors. The plenum box is made of galvanised sheet steel.
No. of spigots Standard lengths (L)
1 300, 400, 500, 600, 700, 800, 900, 1000
2 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000
Position of inlet spigotsThe positions of inlet spigots are equal to those of LD-13 and LD-14 slot diffusers. See drawing and table on page 182.
Slot diffuser face plate designsSlot diffuser face plates are made of line-ar or angular ended sections, which allow the diffusers to be joined at different angles. Angular ended sections are not fitted with air direction controls.
Cylindrical air deflectorsCylindrical deflectors are the most impor-tant components of a slot diffuser. They allow free adjustment of the air flow rate.
Joining slot diffusers together in lengthSections can be joint together by means of connecting plates. Total length of so joint sections is not limited.
1. Plenum box2. Inlet spigot3. Main section4. Cylindrical air deflector
195
VENT
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GRIL
LES,
VE
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ATIN
G VA
LVES
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
CIRC
ULA
R D
IFFU
SER
S,
SQUA
RE
DIF
FUSE
RS
SWIR
L D
IFFU
SER
S,
VAR
IAB
LE S
WIR
L
DIF
FUSE
RS
SLOT
DIF
FUSE
RS,
RO
UND
DU
CT D
IFFU
SER
SAI
R D
ISPL
ACEM
ENT
U
NITS
SUPP
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IR N
OZZL
ESEX
TER
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ELEM
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AIR
FLO
W
CONT
ROL
UNI
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SOU
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TTEN
UATO
RS,
SO
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ATT
ENUA
TING
LO
UVR
ES
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
Fixing of the diffuser to the plenum box with self-tapping screws (U) Fixing of the diffuser to the plenum box
with a spring clamps (S)
Ordering key
Installation with suspension brackets on the plenum box (P)
Installations with suspension bracket on the main section (R)
Fixing of the plenum box onto a LD-15 slot diffuser• With self-tapping screws (designation U)• With spring clamps (designation S)
Installation methods• Installation with suspension brackets on
the plenum box (designation P)• Instalaltion with suspension brackets
on the main section (designation R)
Note:• Please specify the deflector colour in your order.• Standard eloxal colour of the aluminium section is the original aluminium colour. Other colours
shall be specified in the order.• When installing in cooling ceilings, consult the manufacturer.• Versions with insulation on the inside of the plenum box are also available.
LD-15/B/K/M/S/P/I L=1500
Length L=300, 400, 500, 600 …, 2000 (single piece)
I5 Thermal insulation (polyethylene), 5 mm thick, on the outside of the plenum box.
I9 Sound and thermal insulation (from -40 °C to 105 °C), 9 mm thick, on the outside of the plenum box (synthetic rubber based material).
I19 Sound and thermal insulation (from -40 °C to 105 °C), 19 mm thick, on the outside of the plenum box (synthetic rubber based material).
P Installation of the diffuser with suspension brackets on the plenum box
R Installation with suspension brackets on the main section
S Fixing of the diffuser to the plenum box with a spring clampU Fixing of the diffuser to the plenum box with self-tapping screwsM Volume control damperK Plenum boxB Black deflectorsW White deflectors
196
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
0.4
0.3
0.25
0.2
0.15
V (
m/s
)H1
2 2.5 3 4 5 7 10A (m)
H1 (m)1 1.2 1.6 2
LD-15 / 1 160 125 110 90 70 55 45
0.4
0.30.25
0.2
0.15
LD-15 / 1 160 125 110 90 70 55 45
V (
m/s
)L
2 2.5 3 4 5 7 10L (m)
2.5
0.5
0.6
0.8
0.1
0.1
0.25
0.2
0.15
V (
m/s
)H1
2 2.5 3 4 5 7 10A (m)
H1 (m)1 1.2 1.6 2
LD-15 / 1 160 125 110 90 70 55 452.5
2 2.5 3 4 5 7 10L (m)
LD-15 / 1 160 125 110 90 70 55 45
0.7
0.5
0.4
0.30.250.2
0.15V (
m/s
)L
0.1
0.05
(m³/hm) (m³/hm)
(m³/hm) (m³/hm)
L= 500
L=1500
L=1000
L=2000
50 100 150 200
Q (m3/h)
250
LWA<35 dB(A)
LWA35-45 dB(A)
Q (m³/hm)
Technical dataFree surface, per 1 m of length: Aef=0.004559 m².Air flow rate per 1 m of length: Q=20-70 m³/hm.
Fast selection diagram
Air velocity diagrams, at different throw distances
One or two sided horizontal discharge:
Alternate sided horizontal discharge:
197
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
CIRC
ULA
R D
IFFU
SER
S,
SQUA
RE
DIF
FUSE
RS
SWIR
L D
IFFU
SER
S,
VAR
IAB
LE S
WIR
L
DIF
FUSE
RS
SLOT
DIF
FUSE
RS,
RO
UND
DU
CT D
IFFU
SER
SAI
R D
ISPL
ACEM
ENT
U
NITS
SUPP
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IR N
OZZL
ESEX
TER
NAL
ELEM
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AIR
FLO
W
CONT
ROL
UNI
TS
SOU
ND A
TTEN
UATO
RS,
SO
UND
ATT
ENUA
TING
LO
UVR
ES
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
200
100
50
20
10
6
43
21.5
1
500
10001500
p
(Pa
)t
15
10 20
L wa (dB(A))
30 40 50 60 80 100 150 200 250
1000
10
20
25
30
35
40
45
50
55
Q (m3/hm)
αα
α=0˚ α=45˚ α=90˚
Q (m³/h) 100 150 200 100 150 200 100 150 200
L=500 Data in the diagram +5 +7 +10 +15 +32 +35
L=1000 Data in the diagram +10 +12 +15 +33 +62 +100
L=1500 Data in the diagram +4 +4 +8 +32 +63 +106
L=2000 Data in the diagram +1 +2 +3 +27 +55 +81
α = 0˚ Control damper in the inlet spigot is fully opened
α = 45˚ Control damper in the inlet spigot is half opened
α = 90˚ Control damper in the inlet spigot is fully closed
Sound power level and pressure drop
α=0˚ α=45˚ α=90˚
Q (m³/h) 100 150 200 100 150 200 100 150 200
L=500 Data in the diagram +5 +7 +5 +12 +28 +60
L=1000 Data in the diagram +8 +25 +33 +29 +66 +116
L=1500 Data in the diagram +4 +11 +14 +29 +63 +101
L=2000 Data in the diagram +1 +5 +7 +23 +52 +87
α = 0˚ Control damper in the inlet spigot is fully opened
α = 45˚ Control damper in the inlet spigot is half opened
α = 90˚ Control damper in the inlet spigot is half opened
ΔPt correction (in Pa) in cases of vertical discharge
ΔPt correction (in Pa) in cases of inclined discharge
198
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
FA
bE
1
82
3
4
5
6 7
43
1825
43
ØD H2 H
H1
60B1. Plenum box2. Inlet spigot3. Volume control damper4. Side section5. Cylindrical deflector6. Intermediate section7. Connecting bar8. Insulation (entire outside surface
of the plenum box)
ApplicationSlot diffusers LD-17 and LD-18 are designed for supply of cold or warm air in rooms with a height between 2.5 m and 4 m. They allow easy setting of air deflectors for different modes of operation and can be mounted to ceiling or wall.
DescriptionLD-17 and LD-18 slot diffusers are desi-gned in 1, 2, 3 and 4-slot versions. The unit’s front consists of anodised alumini-um profiles (on customer’s request, these can be powder painted in RAL 9010 or another colour). The individually adjusta-ble air deflectors are made of plastic in white (RAL 9010) or black (RAL 9005) colour). Plenum box is made of galvani-sed sheet steel. Slot diffusers LD-17 and LD-18 are made in standard lengths: from 200 up to 2000 mm with a 100 mm step (any length available upon request).Nominal air volume per 1 m of slot:LD-17 – 150 m³/h LD-18 – 200 m³/h (Δpt = 30 Pa, NR = 35 dB)
LD-17 b=15
No. of slots A F E B H H1 H2
1 45.5 34.5 65 107 220 263 203.5
2 78.5 67.5 98 139 230 273 213.5
3 111.5 100.5 131 172 250 293 233.5
4 144.5 133.5 164 205 290 333 273.5
LD-18 b=26.5
No. of slots A F E B H H1 H2
1 57.0 46.0 76.5 118 233 276 216.5
2 101.0 90.5 121.0 162 253 296 236.5
3 146.0 135.0 165.5 207 293 336 276.5
4 190.5 179.5 210.0 251 318 361 301.5
� Slot diffusers LD-17, LD-18
199
VENT
ILAT
ING
GRIL
LES,
VE
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ATIN
G VA
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VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
CIRC
ULA
R D
IFFU
SER
S,
SQUA
RE
DIF
FUSE
RS
SWIR
L D
IFFU
SER
S,
VAR
IAB
LE S
WIR
L
DIF
FUSE
RS
SLOT
DIF
FUSE
RS,
RO
UND
DU
CT D
IFFU
SER
SAI
R D
ISPL
ACEM
ENT
U
NITS
SUPP
LY A
IR N
OZZL
ESEX
TER
NAL
ELEM
ENTS
AIR
FLO
W
CONT
ROL
UNI
TS
SOU
ND A
TTEN
UATO
RS,
SO
UND
ATT
ENUA
TING
LO
UVR
ES
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
φD
B 60
H2
43 H
1 H
J JL/2 L/2
30
0
300
90°
Position of inlet spigots
Number of spigots Standard length Position of inlet
spigots
1 300-1000 L/2
2 1100-1500 J=300
2 1600-2000 J=400
Slot diffuser face plate designsSlot diffuser face plates are made of linear or angular ended sections, which allow the diffusers to be joined at different angles.
Number and diameter of inlet spigots
Joining diffusers together in lengthJoining in length requires connecting pla-tes (the total length of combined diffusers is not limited).
End sealsEnd seals are components of the diffuser face plate. They are available in two designs:• as an angle piece (E – on both ends,
ET – on one end only) or • plates (F – on both ends, FT – on one
end only).The connecting strip-section has no end anglepieces or plates seals (designation T).
L 300 to 1000 1100 to 1500 1600 to 2000
Number of slots Number and diameter of inlet spigots
LD-17 LD-18 LD-17 LD-18 LD-17 LD-18
1 1x98 1x123 2x98 2x123 2x123 2x138
2 1x138 1x158 2x123 2x138 2x138 2x158
3 1x158 1x198 2x138 2x158 2x158 2x198
4 1x198 1x223 2x158 2x198 2x198 2x223
200
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
Fixing of the plenum box onto LD-17, LD-18 diffusers
Installation methods
Types of air discharges
Fixing with self-tapping screws (U) Fixing with spring clamps (S) Fixing with a cross-member (Z)
Installation with hangers (P) Installation with a cross member without plenum box (N)
Different settings of the two slot model (similar combinations are possible also for diffusers with more slots).
Vertical – heating Horizontal – cooling
201
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
CIRC
ULA
R D
IFFU
SER
S,
SQUA
RE
DIF
FUSE
RS
SWIR
L D
IFFU
SER
S,
VAR
IAB
LE S
WIR
L
DIF
FUSE
RS
SLOT
DIF
FUSE
RS,
RO
UND
DU
CT D
IFFU
SER
SAI
R D
ISPL
ACEM
ENT
U
NITS
SUPP
LY A
IR N
OZZL
ESEX
TER
NAL
ELEM
ENTS
AIR
FLO
W
CONT
ROL
UNI
TS
SOU
ND A
TTEN
UATO
RS,
SO
UND
ATT
ENUA
TING
LO
UVR
ES
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
100 300 500 1000
1
2
3
4
štev
ilo re
ž
Q (m /hm)3
LD-17
LD-18
Nr. o
f slo
ts
Quick selection diagram: LWA < 35 dB(A)
Ordering key
I5 Thermal insulation (polyethylene), 5 mm thick, on the outside of the plenum boxI9 Sound and thermal insulation (from -40 °C to 105 °C), 9 mm thick, on the outside of the plenum box
(synthetic rubber based material)I19 Sound and thermal insulation (from -40 °C to 105 °C), 19 mm thick, on the outside of the plenum box
(synthetic rubber based material)N Diffuser installation with a cross-member without plenum boxP Installation of the plenum box with hangers
Z Fixing of the diffuser to the plenum box with a cross-memberS Fixing of the diffuser to the plenum box with spring clampsU Fixing of the diffuser to the plenum box with self-tapping screws
M Volume control damper
K Plenum box
E End sealing on both endsET End sealing on one end
F End plate on both endsFT End plate on one end
T Rail-type without end sealings and plates
B Black deflectorsW White deflectors
1 Number of slots234
LD-17 Slot diffuser typeLD-18
LD-17/1/B/E/K/M/S/P I5 L=1000 (length L=200, 300, …, 2000)
Note:• Please specify the deflector colour in your order.• Standard eloxal colour of the aluminium section is the original aluminium colour. Other colours shall be specified in the order.• When installing in cooling ceilings, consult the manufacturer.• Versions with insulation on the inside of the plenum box are also available.
202
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
Sound power level, pressure drop and throw distances
LD-17 horizontal discharge
Type Q[l/s] 13.9 27.8 41.7 55.6 83.3 111.1 138.9 166.7 194.4 222.2 250.0 277.8 333.3
[m³/h) 50 100 150 200 300 400 500 600 700 800 900 1000 1200
LD-17/1 L=500 mm
LWA [dB (A)] 32 47
Δpt [Pa] 13 42
L0.2 [m] 5.6 6.6
Lmin [m] 12.5 >15
LD-17/1 L=1000 mm
LWA [dB (A)] 27 35 43 50
Δpt [Pa] 8 27 56 95
L0.2 [m] 6 6.5 6.7 6.8
Lmin [m] 12 >15 >15 >15
LD-17/1 L=1500 mm
LWA [dB (A)] <25 29 34 40 50
Δpt [Pa] 5 16 32 52 99
L0.2 [m] 5.5 6.1 6.5 6.6 6.8
Lmin [m] 4 12.5 >15 >15 >15
LD-17/1 L=2000 mm
LWA [dB (A)] <25 32 36 43 49
Δpt [Pa] 2 3 6 11 19
L0.2 [m] 5.8 6.1 6.5 6.7 6.8
Lmin [m] 6.5 12.5 13 >15 >15
LD-17/2 L=500 mm
LWA [dB (A)] <25 34 42 50
Δpt [Pa] 3 11 22 36
L0.2 [m] 5 5.4 5.7 5.8
Lmin [m] 11.5 14 >15 >15
LD-17/2 L=1000 mm
LWA [dB (A)] 27 30 36 45 50
Δpt [Pa] 7 14 22 48 80
L0.2 [m] 5.3 5.4 5.5 5.7 5.8
Lmin [m] 8 13.2 13.4 >15 >15
LD-17/2 L=1500 mm
LWA [dB (A)] 26 30 36 42 46 52
Δpt [Pa] 8 13 28 44 65 84
L0.2 [m] 5.1 5.4 5.5 5.6 5.8 5.8
Lmin [m] 5.7 13.3 13.5 >15 >15 >15
LD-17/2 L=2000 mm
LWA [dB (A)] 26 32 36 41 44 48 51
Δpt [Pa] 2 4 7 10 13 18 22
L0.2 [m] 5.2 5.4 5.5 5.6 5.7 5.7 5.8
Lmin [m] 7.5 13.2 13.4 >15 >15 >15 >15
LD-17/3 L=500 mm
LWA [dB (A)] 30 37 45 54
Δpt [Pa] 5 12 20 50
L0.2 [m] 8 8.5 8.7 9
Lmin [m] 9 10.5 11.2 13.5
LD-17/3 L=1000 mm
LWA [dB (A)] <25 29 34 42 50
Δpt [Pa] 3 8 14 32 54
L0.2 [m] 7.7 7.9 8 8.5 8.8
Lmin [m] 6.4 6.9 9 11 12
LD-17/3 L=1500 mm
LWA [dB (A)] 28 35 42 48 53
Δpt [Pa] 8 19 34 52 79
L0.2 [m] 7.8 8.2 8.5 8.7 8.7
Lmin [m] 7.5 9.5 10.8 11.7 12.3
LD-17/3 L=2000 mm
LWA [dB (A)] 31 36 41 46 50 54
Δpt [Pa] 2 4 6 8 12 17
L0.2 [m] 7.9 8.1 8.4 8.5 8.6 9
Lmin [m] 7.7 9.6 10.5 11 11.9 12
203
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
CIRC
ULA
R D
IFFU
SER
S,
SQUA
RE
DIF
FUSE
RS
SWIR
L D
IFFU
SER
S,
VAR
IAB
LE S
WIR
L
DIF
FUSE
RS
SLOT
DIF
FUSE
RS,
RO
UND
DU
CT D
IFFU
SER
SAI
R D
ISPL
ACEM
ENT
U
NITS
SUPP
LY A
IR N
OZZL
ESEX
TER
NAL
ELEM
ENTS
AIR
FLO
W
CONT
ROL
UNI
TS
SOU
ND A
TTEN
UATO
RS,
SO
UND
ATT
ENUA
TING
LO
UVR
ES
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
Type Q[l/s] 13.9 27.8 41.7 55.6 83.3 111.1 138.9 166.7 194.4 222.2 250.0 277.8 333.3
[m³/h) 50 100 150 200 300 400 500 600 700 800 900 1000 1200
LD-17/4 L=500 mm
LWA [dB (A)] 25 32 40 51 55
Δpt [Pa] 3 7 12 29 50
L0.2 [m] 7.2 7.5 7.6 8 8.1
Lmin [m] 8.2 9 9.5 10.5 11.2
LD-17/4 L=1000 mm
LWA [dB (A)] 35 38 46 53 60
Δpt [Pa] 9 21 38 56 90
L0.2 [m] 7.5 7.6 7.7 7.9 8
Lmin [m] 8.3 9 9.5 10.5 10.5
LD-17/4 L=1500 mm
LWA [dB (A)] 32 38 44 48 52 60
Δpt [Pa] 10 19 30 44 60 80
L0.2 [m] 7.2 7.5 7.6 7.8 7.9 8
Lmin [m] 7.5 8.7 9.5 9.8 10.2 10.4
LD-17/4 L=2000 mm
LWA [dB (A)] 34 38 42 45 49 52 56 60
Δpt [Pa] 3 5 7 9 12 17 23 33
L0.2 [m] 7.4 7.5 7.6 7.8 7.8 7.8 7.9 8.3
Lmin [m] 8.2 8.6 9.2 9.5 9.7 10.2 10.5 11.3
Sound power level, pressure drop and throw distances
LD-17 vertical discharge
Type Q[l/s] 13.9 27.8 41.7 55.6 83.3 111.1 138.9 166.7 194.4 222.2 250.0 277.8 333.3
[m³/h) 50 100 150 200 300 400 500 600 700 800 900 1000 1200
LD-17/1 L=500 mmLWA [dB (A)] 32 47
Δpt [Pa] 17 68
L0.2 (+10K) [m] 2.4 4.8
LD-17/1 L=1000 mmLWA [dB (A)] 27 35 43 50
Δpt [Pa] 4 17 39 68
L0.2 (+10K) [m] 1 2.4 3.5 5
LD-17/1 L=1500 mmLWA [dB (A)] <25 29 34 40 50
Δpt [Pa] 2 8 17 30 68
L0.2 (+10K) [m] 0.9 1.5 2.3 3.3 4.7
LD-17/1 L=2000 mmLWA [dB (A)] <25 32 36 43 49
Δpt [Pa] 4 10 17 39 68
L0.2 (+10K) [m] 0.8 1.8 2.4 3.8 4.8
LD-17/2 L=500 mmLWA [dB (A)] 25 35 43 51
Δpt [Pa] 4 17 39 68
L0.2 (+10K) [m] 1.6 3 4 4.5
LD-17/2 L=1000 mmLWA [dB (A)] 28 31 37 46 51
Δpt [Pa] 4 10 17 39 68
L0.2 (+10K) [m] 1.6 2.6 3 4.2 4.5
Definition of symbols
LWA A-weighted sound power levelDpt Total pressure drop calculated to normal conditionsL0.2 Isothermal throw distance of supply air jet, when its velocity drops down to 0.2 m/s Lmin Minimum distance between diffusers, that the jet velocity is less than or equal to 0.2 m/s
Conditions for Lmin:
Q=600 m³/hL=1000 mmRoom height: H=2.8 mOccupied zone height: 1.8 mRoom temperature: 24 °CSupply temperature: DT= -6 K
204
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
Type Q[l/s] 13.9 27.8 41.7 55.6 83.3 111.1 138.9 166.7 194.4 222.2 250.0 277.8 333.3
[m³/h) 50 100 150 200 300 400 500 600 700 800 900 1000 1200
LD-17/2 L=1500 mmLWA [dB (A)] 26 30 36 42 46 52
Δpt [Pa] 4 8 17 30 48 68
L0.2 (+10K) [m] 1.6 2.5 3.2 3.6 4 4.5
LD-17/2 L=2000 mmLWA [dB (A)] 26 32 36 41 44 48 51
Δpt [Pa] 4 10 17 27 39 52 68
L0.2 (+10K) [m] 1.8 2.5 3.1 3.5 3.8 4.3 4.5
LD-17/3 L=500 mmLWA [dB (A)] 31 38 46 55
Δpt [Pa] 8 17 30 68
L0.2 (+10K) [m] 3.1 4.2 5.5 7.5
LD-17/3 L=1000 mmLWA [dB (A)] 31 36 44 52
Δpt [Pa] 4 8 17 30
L0.2 (+10K) [m] 1.9 3.1 4.2 5.5
LD-17/3 L=1500 mmLWA [dB (A)] 30 37 44 50 55
Δpt [Pa] 3 8 14 21 30
L0.2 (+10K) [m] 1.5 2.9 3.8 4.8 5.5
LD-17/3 L=2000 mmLWA [dB (A)] 32 37 42 47 51 55
Δpt [Pa] 4 8 12 17 23 30
L0.2 (+10K) [m] 1.9 3.1 3.8 4.3 5 5.5
LD-17/4 L=500 mmLWA [dB (A)] 27 34 42 53 57
Δpt [Pa] 4 10 17 39 68
L0.2 (+10K) [m] 3.1 4.3 5.2 6.8 7.7
LD-17/4 L=1000 mmLWA [dB (A)] 36 39 47 54 61
Δpt [Pa] 4 10 17 27 39
L0.2 (+10K) [m] 3 4.4 5.2 6.1 6.7
LD-17/4 L=1500 mmLWA [dB (A)] 33 39 45 49 53 61
Δpt [Pa] 4 8 12 17 23 30
L0.2 (+10K) [m] 2.9 4.1 4.8 5.2 5.8 6.2
LD-17/4 L=2000 mmLWA [dB (A)] 35 39 43 46 50 53 57 61
Δpt [Pa] 4 7 10 13 17 22 27 39
L0.2 (+10K) [m] 3.1 4 4.3 4.8 5.3 5.8 6.1 6.8
Definition of symbols
LWA A-weighted sound power levelDpt Total pressure drop calculated to normal conditionsL0.2 (+10 °C) Isothermal throw distance of supply air jet with temperature +10K,
when its velocity drops down to 0.2 m/s
205
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
CIRC
ULA
R D
IFFU
SER
S,
SQUA
RE
DIF
FUSE
RS
SWIR
L D
IFFU
SER
S,
VAR
IAB
LE S
WIR
L
DIF
FUSE
RS
SLOT
DIF
FUSE
RS,
RO
UND
DU
CT D
IFFU
SER
SAI
R D
ISPL
ACEM
ENT
U
NITS
SUPP
LY A
IR N
OZZL
ESEX
TER
NAL
ELEM
ENTS
AIR
FLO
W
CONT
ROL
UNI
TS
SOU
ND A
TTEN
UATO
RS,
SO
UND
ATT
ENUA
TING
LO
UVR
ES
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
Sound power level, pressure drop and throw distances
LD-18 horizontal discharge
Type Q[l/s] 27.8 41.7 55.6 83.3 111.1 138.9 166.7 194.4 222.2 250.0 277.8 333.3 388.9
[m³/h) 100 150 200 300 400 500 600 700 800 900 1000 1200 1400
LD-18/1 L=500 mm
LWA [dB (A)] 41 51
Δpt [Pa] 24 53
L0.2 [m] 6.6 6.9
Lmin [m] >15 >15
LD-18/1 L=1000 mm
LWA [dB (A)] 29 37 44
Δpt [Pa] 16 36 64
L0.2 [m] 6.2 6.5 6.7
Lmin [m] 12.8 >15 >15
LD-18/1 L=1500 mm
LWA [dB (A)] 25 31 36 46
Δpt [Pa] 9 19 34 77
L0.2 [m] 5.8 6.2 6.4 6.6
Lmin [m] 4.2 12.8 >15 >15
LD-18/1 L=2000 mm
LWA [dB (A)] <25 28 32 40 47 53 58 62
Δpt [Pa] 1 2 4 9 15 24 35 47
L0.2 [m] 5.2 5.9 6.2 6.5 6.7 6.8 6.9 6.9
Lmin [m] 2 6.6 12.8 >15 >15 >15 >15 >15
LD-18/2 L=500 mm
LWA [dB (A)] 29 37 45 56
Δpt [Pa] 6 13 24 53
L0.2 [m] 5.4 5.6 5.7 5.8
Lmin [m] 14 >15 >15 >15
LD-18/2 L=1000 mm
LWA [dB (A)] <25 27 32 40 48
Δpt [Pa] 4 9 16 37 65
L0.2 [m] 5 5.3 5.5 5.6 5.7
Lmin [m] 2 8 13.4 >15 >15
LD-18/2 L=1500 mm
LWA [dB (A)] <25 27 34 40 45 50
Δpt [Pa] 5 9 20 35 55 80
L0.2 [m] 5 5.2 5.4 5.6 5.7 5.7
Lmin [m] 2 5.8 13.4 >15 >15 >15
LD-18/2 L=2000 mm
LWA [dB (A)] 25 30 35 39 44 47 51 54 57 62 67
Δpt [Pa] 1 3 6 9 13 18 23 29 36 52 71
L0.2 [m] 5 5.3 5.4 5.5 5.6 5.7 5.7 5.7 5.8 5.8 5.8
Lmin [m] 2 8 13.4 >15 >15 >15 >15 >15 >15 >15 >15
LD-18/3 L=500 mm
LWA [dB (A)] <25 31 37 48 56 63
Δpt [Pa] 3 6 11 24 42 66
L0.2 [m] 8 8.3 8.6 8.8 9 9.1
Lmin [m] 8 10 11.2 12.6 13.4 13.8
LD-18/3 L=1000 mm
LWA [dB (A)] <25 27 34 40 46 51 55
Δpt [Pa] 4 7 16 29 45 65 88
L0.2 [m] 7.7 8 8.3 8.6 8.7 8.8 8.9
Lmin [m] 6.4 8 10 11.2 12 12.6 13
LD-18/3 L=1500 mm
LWA [dB (A)] <25 29 34 38 42 46 50 53 56
Δpt [Pa] 4 9 15 24 34 47 61 77 96
L0.2 [m] 7.6 8 8.2 8.4 8.6 8.7 8.7 8.8 8.9
Lmin [m] 5.8 8.2 9.6 10.6 11.2 11.8 12.2 12.6 12.8
LD-18/3 L=2000 mm
LWA [dB (A)] 26 30 34 37 40 44 46 49 54 58
Δpt [Pa] 1 2 3 4 6 8 10 12 17 23
L0.2 [m] 7.7 8 8.2 8.4 8.5 8.6 8.6 8.7 8.8 8.9
Lmin [m] 6.4 8 9.2 10 10.8 11.2 11.8 12 12.6 13
206
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
Type Q[l/s] 27.8 41.7 55.6 83.3 111.1 138.9 166.7 194.4 222.2 250.0 277.8 333.3 388.9
[m³/h) 100 150 200 300 400 500 600 700 800 900 1000 1200 1400
LD-18/4 L=500 mm
LWA [dB (A)] 28 34 44 52 58 64 68
Δpt [Pa] 3 6 13 24 37 53 72
L0.2 [m] 7.4 7.6 7.8 8 8.1 8.2 8.3
Lmin [m] 8.2 9 10.2 10.6 11 11.2 11.4
LD-18/4 L=1000 mm
LWA [dB (A)] <25 31 37 42 47 51 55 58
Δpt [Pa] 4 9 16 26 37 50 65 83
L0.2 [m] 7 7.4 7.6 7.7 7.8 7.9 8 8
Lmin [m] 6.2 8.2 9 9.6 10.2 10.4 10.6 10.8
LD-18/4 L=1500 mm
LWA [dB (A)] 26 31 35 38 42 45 48 51 56
Δpt [Pa] 5 9 14 20 28 36 46 57 82
L0.2 [m] 7 7.3 7.4 7.6 7.7 7.8 7.8 7.9 8
Lmin [m] 6.2 7.6 8.4 9 9.6 9.8 10 10.4 10.6
LD-18/4 L=2000 mm
LWA [dB (A)] 28 31 34 37 40 42 45 50 54
Δpt [Pa] 2 3 4 6 7 9 11 16 22
L0.2 [m] 7 7.2 7.4 7.5 7.6 7.7 7.7 7.8 7.9
Lmin [m] 6.2 7.4 8.2 8.6 9.2 9.4 9.8 10.2 10.4
Conditions for Lmin:
Q=600 m³/hL=1000 mmRoom height: H=2.8 mOccupied zone height: 1.8 mRoom temperature: 24 °CSupply temperature: DT= -6 K
Definition of symbols
LWA A-weighted sound power levelDpt Total pressure drop calculated to normal conditionsL0.2 Isothermal throw distance of supply air jet, when its velocity
drops down to 0.2 m/sLmin Minimum distance between diffusers, that the jet velocity is
less than or equal to 0.2 m/s
207
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
CIRC
ULA
R D
IFFU
SER
S,
SQUA
RE
DIF
FUSE
RS
SWIR
L D
IFFU
SER
S,
VAR
IAB
LE S
WIR
L
DIF
FUSE
RS
SLOT
DIF
FUSE
RS,
RO
UND
DU
CT D
IFFU
SER
SAI
R D
ISPL
ACEM
ENT
U
NITS
SUPP
LY A
IR N
OZZL
ESEX
TER
NAL
ELEM
ENTS
AIR
FLO
W
CONT
ROL
UNI
TS
SOU
ND A
TTEN
UATO
RS,
SO
UND
ATT
ENUA
TING
LO
UVR
ES
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
Sound power level, pressure drop and throw distances
LD-18 vertical discharge
Type Q[l/s] 27.8 41.7 55.6 83.3 111.1 138.9 166.7 194.4 222.2 250.0 277.8 333.3 388.9
[m³/h) 100 150 200 300 400 500 600 700 800 900 1000 1200 1400
LD-18/1 L=500 mmLWA [dB (A)] 40 51
Δpt [Pa] 25 56
L0.2 (+10K) [m] 3.4 5.1
LD-18/1 L=1000 mmLWA [dB (A)] 29 36 43
Δpt [Pa] 17 39 69
L0.2 (+10K) [m] 1.5 2.5 3.4
LD-18/1 L=1500 mmLWA [dB (A)] 25 31 36 45
Δpt [Pa] 10 21 38 86
L0.2 (+10K) [m] 0.7 1.5 2.2 3.5
LD-18/1 L=2000 mmLWA [dB (A)] 28 32 39 46 52 57
Δpt [Pa] 4 7 17 30 47 67
L0.2 (+10K) [m] 0.9 2 2.5 3.5 4.4 5.2
LD-18/2 L=500 mmLWA [dB (A)] 29 37 44 55
Δpt [Pa] 6 14 25 56
L0.2 (+10K) [m] 2.4 3.2 3.8 4.6
LD-18/2 L=1000 mmLWA [dB (A)] <25 27 32 40 47
Δpt [Pa] 4 10 17 39 69
L0.2 (+10K) [m] 1 1.9 2.4 3.2 3.8
LD-18/2 L=1500 mmLWA [dB (A)] <25 27 33 39 44 49
Δpt [Pa] 6 10 22 39 61 88
L0.2 (+10K) [m] 1.1 1.7 2.4 3 3.4 3.8
LD-18/2 L=2000 mmLWA [dB (A)] 25 30 35 39 43 47 50 53 56 61
Δpt [Pa] 2 5 9 15 21 29 38 48 59 85
L0.2 (+10K) [m] 1 1.9 2.4 2.9 3.2 3.5 3.8 4 4.3 4.6
LD-18/3 L=500 mmLWA [dB (A)] 23 30 36 46 54 60
Δpt [Pa] 3 6 11 25 44 69
L0.2 (+10K) [m] 1.9 3.1 4 5.7 7.1 8.2
LD-18/3 L=1000 mmLWA [dB (A)] <25 26 33 39 44 49 53
Δpt [Pa] 4 8 17 31 49 70 95
L0.2 (+10K) [m] 1.3 1.9 3.1 4 5 5.8 6.5
LD-18/3 L=1500 mmLWA [dB (A)] 23 28 33 37 41 45 48 51
Δpt [Pa] 5 10 18 28 41 56 73 92
L0.2 (+10K) [m] 1 1.9 2.7 3.4 4 4.7 5.2 5.8
LD-18/3 L=2000 mmLWA [dB (A)] 26 29 33 36 39 42 45 47 52 56
Δpt [Pa] 3 5 8 12 16 21 27 34 48 66
L0.2 (+10K) [m] 1.3 1.9 2.5 3.1 3.6 4 4.5 5 5.8 6.5
LD-18/4 L=500 mmLWA [dB (A)] 21 27 33 42 50 56 61
Δpt [Pa] 2 3 6 14 25 39 56
L0.2 (+10K) [m] 2.1 3.3 4.1 5.4 6.4 7.2 7.9
Definition of symbols
LWA A-weighted sound power levelDpt Total pressure drop calculated to normal conditions
L0.2 (+10 °C) Isothermal throw distance of supply air jet with temperature +10K, when its velocity drops down to 0.2 m/s
208
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
100
LD-17/1
∆p t
(Pa)
Q (m /h) 3 150 200 300
5
10
20
4050
100
200L=500 mm 1500
2000
500 700
1000
30
2
LD-17/2
(Pa)
5
10
20
4050
100
200L=500 mm
1500
2000
1000
30
2
LD-17/4
(Pa)
5
10
20
4050
100
200 L=500 mm
1500
2000
1000
30
2
40
30
35
45
50
L WA (dB(A))
40
30
35
45
50
40
30
35
45
50
50 100Q (m /h) 3
150 200 300 500 70050 900
100
LD-17/3
(Pa)
Q (m /h) 3 200 300
5
10
20
4050
100
200L=500 mm
1500
2000
500 900700
1000
30
2
40
30
35
45
50
150 100Q (m /h) 3
200 300 500 900700150
∆p t
∆p t
∆p t
L WA (dB(A))
L WA (dB(A))
L WA (dB(A))
Type Q[l/s] 27.8 41.7 55.6 83.3 111.1 138.9 166.7 194.4 222.2 250.0 277.8 333.3 388.9
[m³/h) 100 150 200 300 400 500 600 700 800 900 1000 1200 1400
LD-18/4 L=1000 mmLWA [dB (A)] <25 30 36 41 45 49 53 56
Δpt [Pa] 4 10 18 27 39 54 70 89
L0.2 (+10K) [m] 2.1 3.3 4.1 4.8 5.4 6 6.5 6.9
LD-18/4 L=1500 mmLWA [dB (A)] 26 30 34 37 41 44 47 50 54
Δpt [Pa] 6 10 16 23 32 41 52 65 93
L0.2 (+10K) [m] 2.1 2.9 3.6 4.1 4.6 5 5.5 5.8 6.5
LD-18/4 L=2000 mmLWA [dB (A)] 27 30 33 36 39 41 44 48 52
Δpt [Pa] 3 5 7 10 13 16 20 29 39
L0.2 (+10K) [m] 2.1 2.8 3.3 3.8 4.2 4.5 4.8 5.5 6
Pressure drop(valid for horizontal discharge and plenum box with 100 % opened volume control damper)
209
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
CIRC
ULA
R D
IFFU
SER
S,
SQUA
RE
DIF
FUSE
RS
SWIR
L D
IFFU
SER
S,
VAR
IAB
LE S
WIR
L
DIF
FUSE
RS
SLOT
DIF
FUSE
RS,
RO
UND
DU
CT D
IFFU
SER
SAI
R D
ISPL
ACEM
ENT
U
NITS
SUPP
LY A
IR N
OZZL
ESEX
TER
NAL
ELEM
ENTS
AIR
FLO
W
CONT
ROL
UNI
TS
SOU
ND A
TTEN
UATO
RS,
SO
UND
ATT
ENUA
TING
LO
UVR
ES
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
LD-17/2 Type of discharge Horizontal Vertical
Length Volume control damper Open Closed Open Closed
L=500Δpt x 1 x 2 x 1.0 x 2.2
LWA - + 4 + 1 + 2
L=1000Δpt x 1 x 2.3 x 1.2 x 2.2
LWA - + 4 + 1 + 2
L=1500Δpt x 1 x 2.3 x 1.2 x 2.3
LWA - + 3 - + 1
L=2000Δpt x 1 x 3 x 1.6 x 3.4
LWA - + 3 - + 1
LD-17/3 Type of discharge Horizontal Vertical
Length Volume control damper Open Closed Open Closed
L=500Δpt x 1 x 2.5 x 1.1 x 2.4
LWA - + 5 + 1 + 4
L=1000Δpt x 1 x 2.6 x 1.2 x 2.5
LWA - + 6 + 2 + 4
L=1500Δpt x 1 x 2.7 x 1.2 x 2.8
LWA - + 6 + 2 + 3
L=2000Δpt x 1 x 3.2 x 2.5 x 6
LWA - + 5 + 1 + 2
LD-17/4 Type of discharge Horizontal Vertical
Length Volume control damper Open Closed Open Closed
L=500Δpt x 1 x 2.2 x 1.2 x 2.4
LWA - + 6 + 2 + 3
L=1000Δpt x 1 x 2.4 x 1.2 x 2.4
LWA - + 5 + 1 + 3
L=1500Δpt x 1 x 2.7 x 1.2 x 2.7
LWA - + 6 + 1 + 2
L=2000Δpt x 1 x 5 x 1.9 x 4.3
LWA - + 6 + 1 + 2
Correction factors
LD-17/1 Type of discharge Horizontal Vertical
Length Volume control damper Open Closed Open Closed
L=500Δpt x 1 x 1.1 x 1.1 x 1.5
LWA - + 1 - + 2
L=1000Δpt x 1 x 1.2 x 1.2 x 1.5
LWA - + 2 - + 1
L=1500Δpt x 1 x 1.3 x 1.2 x 1.6
LWA - + 2 - +1
L=2000Δpt x 1 x 2.9 x 2.0 x 2.7
LWA - + 2 - -
210
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
100
LD-18/1
(Pa)
Q (m /h) 3 150 200 300
5
10
20
4050
100
200L=500 mm 1500
2000
500 1000700
1000
30
2
100
LD-18/2
(Pa)
Q (m /h) 3 150 200 300
5
10
20
4050
100
200L=500 mm 1500
2000
500 1000700
1000
30
2
100
LD-18/3
(Pa)
Q (m /h) 3 150 200 300
5
10
20
4050
100
200L=500 mm
1500
2000
500 1000700
1000
30
2
100
LD-18/4
(Pa)
Q (m /h) 3 150 200 300
5
10
20
4050
100
200L=500 mm
1500
2000
500 1000700
1000
30
2
40
30
35
45
50
40
30
35
45
50
40
30
35
45
50
1400
40
30
35
45
50
1200
∆p t
∆p t
∆p t
∆p t
L � � (��( �) )
L � � (��( �) )
L � � (��( �) )
L � � (��( �) )
Pressure drop(valid for horizontal discharge and plenum box with 100 % opened volume control damper)
211
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
CIRC
ULA
R D
IFFU
SER
S,
SQUA
RE
DIF
FUSE
RS
SWIR
L D
IFFU
SER
S,
VAR
IAB
LE S
WIR
L
DIF
FUSE
RS
SLOT
DIF
FUSE
RS,
RO
UND
DU
CT D
IFFU
SER
SAI
R D
ISPL
ACEM
ENT
U
NITS
SUPP
LY A
IR N
OZZL
ESEX
TER
NAL
ELEM
ENTS
AIR
FLO
W
CONT
ROL
UNI
TS
SOU
ND A
TTEN
UATO
RS,
SO
UND
ATT
ENUA
TING
LO
UVR
ES
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
LD-18/3 Type of discharge Horizontal Vertical
Length Volume control damper Open Closed Open Closed
L=500Δpt x 1 x 2.5 x 1.0 x 2.4
LWA - + 6 - + 3
L=1000Δpt x 1 x 2.5 x 1.1 x 2.5
LWA - + 6 - + 3
L=1500Δpt x 1 x 2.5 x 1.2 x 2.7
LWA - + 6 - + 2
L=2000Δpt x 1 x 3.1 x 2.8 x 6.5
LWA - + 6 - + 3
LD-18/2 Type of discharge Horizontal Vertical
Length Volume control damper Open Closed Open Closed
L=500Δpt x 1 x 2.1 x 1 x 2.1
LWA - + 3 - + 1
L=1000Δpt x 1 x 2.2 x 1.1 x 2.1
LWA - + 3 - + 1
L=1500Δpt x 1 x 2.2 x 1.1 x 2.2
LWA - + 3 - + 1
L=2000Δpt x 1 x 3 x 1.6 x 3.3
LWA - + 3 - + 1
LD-18/4 Type of discharge Horizontal Vertical
Length Volume control damper Open Closed Open Closed
L=500Δpt x 1 x 2.2 x 1 x 2.4
LWA - + 5 + 1 + 2
L=1000Δpt x 1 x 2.3 x 1.1 x 2.5
LWA - + 5 - + 2
L=1500Δpt x 1 x 2.6 x 1.1 x 2.6
LWA - + 5 - + 2
L=2000Δpt x 1 x 5 x 1.8 x 4.3
LWA - + 4 - + 2
Correction factors
LD-18/1 Type of discharge Horizontal Vertical
Length Volume control damper Open Closed Open Closed
L=500Δpt x 1 x 1 x 1 x 1.4
LWA - + 1 - -
L=1000Δpt x 1 x 1.1 x 1.1 x 1.4
LWA - + 1 - -
L=1500Δpt x 1 x 1.2 x 1.1 x 1.5
LWA - + 1 - -
L=2000Δpt x 1 x 2.8 x 1.9 x 2.6
LWA - + 1 - -
212
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
L1 L1L
H1 A
L1 L1L
H1 A A
8
85 125
8
85 125
B
φD
60
H32
A
JJL/2 L/2
3
2 7
1
5
4
6
� Nozzle diffuser LD-19
ApplicationNozzle diffuser LD-19 is designed for supply of warm or cold air and can be mounted in the wall or in the ceiling. Adjustable deflectors allow us to set different directions of air discharge.
Description Front plate is made of sheet steel and powder painted in white (RAL 9010) or any other RAL colour (on customer’s request). Individually adjustable nozzles are made of plastics in white (RAL 9010) or black (RAL 9005) colour.Plenum box is made of sheet steel. Nozzle diffusers are made in standard lenghts (one section) from 600 up to 2000 mm with 100 mm step.
Dimensions
L 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000
L1 552 652 752 852 476 526 576 626 676 726 776 826 876 926 976
No. of nozzles* 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
No. of rows A H1 B H
1 85 65 117 216.5
2 125 105 162 236.5
*Up to length L=900mm: fixing with 4 screws. Other sizes: fixing with 6 screws.
1. Plenum box 2. Spigot3. Volume control damper (M)4. Nozzle5. Cross bar6. Fixing screw7. Insulation (entire outside surface
of the plenum box)
213
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
CIRC
ULA
R D
IFFU
SER
S,
SQUA
RE
DIF
FUSE
RS
SWIR
L D
IFFU
SER
S,
VAR
IAB
LE S
WIR
L
DIF
FUSE
RS
SLOT
DIF
FUSE
RS,
RO
UND
DU
CT D
IFFU
SER
SAI
R D
ISPL
ACEM
ENT
U
NITS
SUPP
LY A
IR N
OZZL
ESEX
TER
NAL
ELEM
ENTS
AIR
FLO
W
CONT
ROL
UNI
TS
SOU
ND A
TTEN
UATO
RS,
SO
UND
ATT
ENUA
TING
LO
UVR
ES
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
Nastavitve kota šobe Hlajenje Gretje
B
φD
60
H32
A
JJL/2 L/2
Nastavitve kota šobe Hlajenje Gretje
Front plate installation
Types of air discharge
Number and dimensions of spigots
Position of inlet spigots
L 600 – 1000 1100 – 1500 1600 – 2000
No. of rows Number and dimensions of spigots fD
1 1x123 2x123 2x138
2 1x158 2x138 2x158
With screws (V)
Installation with a cross-member (Z)
Installation on a cross bar can be made through the hole, in which is mounted a nozzle.
Installation of a plenum box with suspension bracket (P)
Possible angle settingsCooling
Heating
No. of inlet spigots
Standard length
Position of inlet spigots
1 600-1000 L/2
2 1100-1500 J=300
2 1600-2000 J=400
214
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
Ordering key
Note:Standard colour is RAL 9010. Other colours on customer’s request.
I5 Thermal insulation (polyethylene), 5 mm thick, on the outside of the plenum boxI9 Sound and thermal insulation (from -40 °C to 105 °C), 9 mm thick, on the outside of the
plenum box (synthetic rubber based material)I19 Sound and thermal insulation (from -40 °C to 105 °C), 19 mm thick, on the outside of the
plenum box (synthetic rubber based material)
P Installation of the plenum box with hangers
Z Fixing of the diffuser to the plenum box with a cross-memberV Visible installation (front plate without plenum box)
M Volume control damper
K Plenum box
B Black deflectorsW White deflectors
1 Number of rows with nozzles2
LD-19 Nozzle diffuser
LD-19/1/B/K/M/Z/P/I5 L=1000 (length L=600, 700, …, 2000)
215
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
CIRC
ULA
R D
IFFU
SER
S,
SQUA
RE
DIF
FUSE
RS
SWIR
L D
IFFU
SER
S,
VAR
IAB
LE S
WIR
L
DIF
FUSE
RS
SLOT
DIF
FUSE
RS,
RO
UND
DU
CT D
IFFU
SER
SAI
R D
ISPL
ACEM
ENT
U
NITS
SUPP
LY A
IR N
OZZL
ESEX
TER
NAL
ELEM
ENTS
AIR
FLO
W
CONT
ROL
UNI
TS
SOU
ND A
TTEN
UATO
RS,
SO
UND
ATT
ENUA
TING
LO
UVR
ES
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
L02 (m)L02 (m) L02 (m)L02 (m)
Quick selection
Sound power level, pressure drop and throw distances
Horizontal discharge DT= 0K
Type Q (l/s) 13.9 27.8 41.7 55.6 69.4 83.3 111.1
(m³/h) 50 100 150 200 250 300 400
LD-19/1 L=600 mm
LWA (dB(A)) 27 40 46.8 / / / /
Δpt (Pa) 12.8 47 101.2 / / / /
L0.2 (m) 2.7 3.5 4.1 / / / /
Lmin (m) 4.3 5.9 7.1 / / / /
LD-19/1 L=1000 mm
LWA (dB(A)) 21.4 33.7 40.8 44.8 / / /
Δpt (Pa) 5 17.7 37.7 64.6 / / /
L0.2 (m) 2.2 2.8 3.6 4.4 / / /
Lmin (m) 3.2 4.4 6.0 7.6 / / /
LD-19/1 L=1500 mm
LWA (dB(A)) 16.4 27.4 34.8 39.7 43.1 / /
Δpt (Pa) 2.3 7.9 16.9 28.9 43.8 / /
L0.2 (m) 2 2.5 2.8 3.3 3.9 / /
Lmin (m) 2.7 3.7 4.4 5.4 6.6 / /
LD-19/1 L=2000 mm
LWA (dB(A)) 13.1 22.8 30 35.2 39.1 41.9 45.5
Δpt (Pa) 1.4 4.6 9.7 16.5 25 35.2 60.4
L0.2 (m) 1.9 2.2 2.6 2.9 3.2 3.6 3.9
Lmin (m) 2.5 3.1 3.9 4.5 5.1 5.9 6.6
LD-19/2 L=600 mm
LWA (dB(A)) 19.1 30.9 38.2 / / / /
Δpt (Pa) 3.4 12.2 26 / / / /
L0.2 (m) 3.2 4.6 6.8 / / / /
Lmin (m) 5.4 8.2 12.6 / / / /
LD-19/2 L=1000 mm
LWA (dB(A)) 13.1 22.8 30 35.2 / / /
Δpt (Pa) 1.5 4.9 10.1 17.1 / / /
L0.2 (m) 2.7 3.5 4.3 5.4 / / /
Lmin (m) 4.3 5.9 7.6 9.8 / / /
LD-19/2 L=1500 mm
LWA (dB(A)) 10.3 18.4 24.9 30.1 34.2 / /
Δpt (Pa) 0.7 2.4 4.8 7.9 11.9 / /
L0.2 (m) 2.4 3 3.4 4.2 4.8 / /
Lmin (m) 3.7 4.9 5.7 7.3 8.5 / /
LD-19/2 L=2000 mm
LWA (dB(A)) 9.1 16.6 22.8 27.8 31.9 35.3 40.3
Δpt (Pa) 0.5 1.4 2.8 4.7 6.9 9.6 16.2
L0.2 (m) 2.4 2.8 3.1 3.6 4 4.4 5.6
Lmin (m) 3.6 4.4 5.1 6.1 6.9 7.7 10.1
Definition of symbols
LWA (dB(A)) Sound power levelDpt (Pa) Total pressure dropL0.2 (m) Isothermal throw length of supply air jet, when its speed drops down to 0.2 m/sLmin (m) Minimum distance between diffusers, that the jet velocity is less than or equal to 0.2 m/s
Conditions for Lmin:
Room height: H=2.8 mOccupied zone height: 1.8 mRoom temperature: 24 °CSupply temperature by cooling: ΔT= - 6 K
216
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
L 02 (m
)
Vertical discharge DT= +5K
Type Q (l/s) 13.89 27.78 41.67 55.56 69.44 83.33 111.11
(m³/h) 50.00 100.00 150.00 200.00 250.00 300.00 400.00
LD-19/2 L=600 mmLWA (dB(A)) 19.1 30.9 38.2 / / / /Δpt (Pa) 3.4 12.2 26 / / / /L0.2 (m) 1.20 1.72 2.55 / / / /
LD-19/2 L=1000 mmLWA (dB(A)) 13.1 22.8 30 35.2 / / /Δpt (Pa) 1.5 4.9 10.1 17.1 / / /L0.2 (m) 1.16 1.45 1.64 2.03 / / /
LD-19/2 L=1500 mmLWA (dB(A)) 10.3 18.4 24.9 30.1 34.2 / /Δpt (Pa) 0.7 2.4 4.8 7.9 11.9 / /L0.2 (m) 1.07 1.33 1.51 1.87 2.14 / /
LD-19/2 L=2000 mmLWA (dB(A)) 9.1 16.6 22.8 27.8 31.9 35.3 40.3Δpt (Pa) 0.5 1.4 2.8 4.7 6.9 9.6 16.2L0.2 (m) 1.03 1.26 1.40 1.62 1.80 1.98 2.52
Sound power level, pressure drop and throw distances
Vertical discharge DT= 0K
Type Q (l/s) 13.9 27.8 41.7 55.6 69.4 83.3 111.1
(m³/h) 50 100 150 200 250 300 400
LD-19/2 L=600 mmLWA (dB(A)) 19.1 30.9 38.2 / / / /Δpt (Pa) 3.4 12.2 26 / / / /L0.2 (m) 1.8 2.6 3.9 / / / /
LD-19/2 L=1000 mmLWA (dB(A)) 13.1 22.8 30 35.2 / / /Δpt (Pa) 1.5 4.9 10.1 17.1 / / /L0.2 (m) 1.6 2.0 2.3 2.8 / / /
LD-19/2 L=1500 mmLWA (dB(A)) 10.3 18.4 24.9 30.1 34.2 / /Δpt (Pa) 0.7 2.4 4.8 7.9 11.9 / /L0.2 (m) 1.4 1.7 1.9 2.4 2.7 / /
LD-19/2 L=2000 mmLWA (dB(A)) 9.1 16.6 22.8 27.8 31.9 35.3 40.3Δpt (Pa) 0.5 1.4 2.8 4.7 6.9 9.6 16.2L0.2 (m) 1.3 1.6 1.8 2.1 2.3 2.5 3.2
Vertical discharge DT= +10K
Type Q (l/s) 13.89 27.78 41.67 55.56 69.44 83.33 111.11
(m³/h) 50.00 100.00 150.00 200.00 250.00 300.00 400.00
LD-19/2 L=600 mmLWA (dB(A)) 19.1 30.9 38.2 / / / /Δpt (Pa) 3.4 12.2 26 / / / /L0.2 (m) 0.85 1.22 1.81 / / / /
LD-19/2 L=1000 mmLWA (dB(A)) 13.1 22.8 30 35.2 / / /Δpt (Pa) 1.5 4.9 10.1 17.1 / / /L0.2 (m) 0.86 1.07 1.22 1.50 / / /
LD-19/2 L=1500 mmLWA (dB(A)) 10.3 18.4 24.9 30.1 34.2 / /Δpt (Pa) 0.7 2.4 4.8 7.9 11.9 / /L0.2 (m) 0.74 0.92 1.04 1.29 1.47 / /
LD-19/2 L=2000 mmLWA (dB(A)) 9.1 16.6 22.8 27.8 31.9 35.3 40.3Δpt (Pa) 0.5 1.4 2.8 4.7 6.9 9.6 16.2L0.2 (m) 0.69 0.85 0.94 1.09 1.21 1.33 1.69
Definitions of symbols
LWA (dB(A)) Sound power levelDpt (Pa) Total pressure dropL0.2 (m) Isothermal throw length of supply air jet, when its speed drops down to 0.2 m/s
217
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
CIRC
ULA
R D
IFFU
SER
S,
SQUA
RE
DIF
FUSE
RS
SWIR
L D
IFFU
SER
S,
VAR
IAB
LE S
WIR
L
DIF
FUSE
RS
SLOT
DIF
FUSE
RS,
RO
UND
DU
CT D
IFFU
SER
SAI
R D
ISPL
ACEM
ENT
U
NITS
SUPP
LY A
IR N
OZZL
ESEX
TER
NAL
ELEM
ENTS
AIR
FLO
W
CONT
ROL
UNI
TS
SOU
ND A
TTEN
UATO
RS,
SO
UND
ATT
ENUA
TING
LO
UVR
ES
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
L WA (dB(A))
L WA (dB(A))
L WA (dB(A))
L WA (dB(A))
100
LD-19/1
∆p t
(Pa
)
Q (m /h) 3 150 200 300
5
10
20
4050
100
200L=600mm 1500 2000
500 1000700
1000
30
2
100
LD-19/2
∆p t
(Pa
)
Q (m /h) 3 150 200 300
5
10
20
4050
100
200L=600mm
1500
2000
500 1000700
1000
30
2
50
45
40
35
45
40
35
30
100
LD-20/1
∆p t
(Pa
)
Q (m /h) 3 150 200 300
5
10
20
4050
100
200L=600mm 1500 2000
500 1000700
1000
30
2
30
25
40
35
100
LD-20/2
∆pt
(Pa
)
Q (m /h) 3 150 200 300
5
10
20
4050
100
200L=600mm
1500
2000
500 1000700
1000
30
2
20
25
30
35L WA
(dB(A))
L WA (dB(A))
L WA (dB(A))
L WA (dB(A))
100
LD-19/1
∆p t
(Pa
)
Q (m /h) 3 150 200 300
5
10
20
4050
100
200L=600mm 1500 2000
500 1000700
1000
30
2
100
LD-19/2
∆p t
(Pa
)Q (m /h) 3
150 200 300
5
10
20
4050
100
200L=600mm
1500
2000
500 1000700
1000
30
2
50
45
40
35
45
40
35
30
100
LD-20/1
∆p t
(Pa
)
Q (m /h) 3 150 200 300
5
10
20
4050
100
200L=600mm 1500 2000
500 1000700
1000
30
2
30
25
40
35
100
LD-20/2
∆p t
(Pa
)
Q (m /h) 3 150 200 300
5
10
20
4050
100
200L=600mm
1500
2000
500 1000700
1000
30
2
20
25
30
35
LD 19/2
Sound power level and pressure dropPressure drop by horizontal discharge and 100 % opened volume control damper.
Correction factors applicable to LD-19
LD-19/1 LD-19/2
LengthVolume control damper Volume control damper
open closed open closed
L=600 X 1 X 1.3 X 1 X 1.8
L=1000 X 1 X 1.4 X 1 X 2
L=1500 X 1 X 1.5 X 1 X 2.2
L=2000 X 1 X 2 X 1 X 2.5
218
IMP Klima
LD 19/1
Slot diffusers, Round duct diffusersSlot diffusers
L1 L1L
H1 A
L1 L1L
H1 A A
8
85 125
8
85 125
B
φD
60
H32
Aφ20
8
JJL/2 L/2
3
2 7
1
5
4
6
� Nozzle diffuser LD-20
ApplicationNozzle diffuser LD-20 is designed to supply low quantities of air on big window surfaces to prevent condensation (ceiling installation near windows) or for big throws for cooling when wall installation (Coanda effect).
DescriptionThe front plate is made of sheet steel powder painted in white (RAL 9010) or any other RAL colour (on customer’s request). Individually adjustable nozzles are made from plastic in white (RAL 9010) or black (RAL 9005) colour. Plenum box is made of sheet steel. Nozzle diffuser LD-20 can be made in standard lenghts (one section) from 600 up to 2000 mm with 100 mm step.
L 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000
L1 552 652 752 852 476 526 576 626 676 726 776 826 876 926 976
No. of nozzles 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
No. of rows H1 B H A
1 65 117 216.5 85
2 105 162 236.5 125
1. Plenum box 2. Inlet spigot3. Volume control damper (M)4. Nozzle5. Cross-bar6. Fixing screw7. Insulation (entire outside surface of the
plenum box)
219
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
CIRC
ULA
R D
IFFU
SER
S,
SQUA
RE
DIF
FUSE
RS
SWIR
L D
IFFU
SER
S,
VAR
IAB
LE S
WIR
L
DIF
FUSE
RS
SLOT
DIF
FUSE
RS,
RO
UND
DU
CT D
IFFU
SER
SAI
R D
ISPL
ACEM
ENT
U
NITS
SUPP
LY A
IR N
OZZL
ESEX
TER
NAL
ELEM
ENTS
AIR
FLO
W
CONT
ROL
UNI
TS
SOU
ND A
TTEN
UATO
RS,
SO
UND
ATT
ENUA
TING
LO
UVR
ES
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
150150
150
150
B
φD
60
H32
Aφ20
8
JJL/2 L/2
With screws(V)
Installation with a cross-member (Z) Installation on a cross bar can be made through the hole, in which is mounted a nozzle.
Installation of a plenum box with suspension bracket (P)
L 600 – 1000 1100 – 1500 1600 – 2000
No. of rows Number and dimensions of spigots fD
1 1x123 2x123 2x138
2 1x158 2x138 2x158
Possible angle settings
Front plate installation
Number and dimensions of spigots
Position of inlet spigots No. of inlet spigots
Standardlength
Position of inlet spigots
1 600-1000 L/2
2 1100-1500 J=300
2 1600-2000 J=400
220
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
Ordering key
LD-20/1/B/K/M/Z/P/I5 L=1000 (lenght L=600, 700, …, 2000)
Note:Sandard colour is RAL 9010. Other colours on customer’s request.
I5 Thermal insulation (polyethylene), 5 mm thick, on the outside of the plenum boxI9 Sound and thermal insulation (from -40 °C to 105 °C), 9 mm thick, on the outside of the plenum
I19 Sound and thermal insulation (from -40 °C to 105 °C), 19 mm thick, on the outside of the plenum box (synthetic rubber based material)
P Installation of the plenum box with hangers
Z Fixing of the diffuser to the plenum box with a cross-memberV Visible installation (front plate without plenum box)
M Volume control damper
K Plenum box
B Black nozzlesW White nozzles
1 Number of rows with nozzles2
LD-20 Nozzle diffuser
221
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
CIRC
ULA
R D
IFFU
SER
S,
SQUA
RE
DIF
FUSE
RS
SWIR
L D
IFFU
SER
S,
VAR
IAB
LE S
WIR
L
DIF
FUSE
RS
SLOT
DIF
FUSE
RS,
RO
UND
DU
CT D
IFFU
SER
SAI
R D
ISPL
ACEM
ENT
U
NITS
SUPP
LY A
IR N
OZZL
ESEX
TER
NAL
ELEM
ENTS
AIR
FLO
W
CONT
ROL
UNI
TS
SOU
ND A
TTEN
UATO
RS,
SO
UND
ATT
ENUA
TING
LO
UVR
ES
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
Quick selection
Sound power level, pressure drop and throw distances
Horizontal discharge DT=0K
Type Q (l/s) 13.9 27.8 41.7 55.6 69.4 83.3 111.1
(m³/h) 50 100 150 200 250 300 400
LD-20/1 L=600 mm
LWA (dB(A)) 20 33.8 41 / / / /
Δpt (Pa) 13.5 35.6 74.8 / / / /
L0.2 (m) 6.6 > 10 > 10 / / / /
LD-20/1 L=1000 mm
LWA (dB(A)) 11 23.2 30 36 / / /
Δpt (Pa) 12 22 43 76 / / /
L0.2 (m) 3.8 6.6 9.3 > 10 / / /
LD-20/1 L=1500 mm
LWA (dB(A)) 8 14.5 25 31 35 37.5 43
Δpt (Pa) 5.5 12.5 25 39.6 55 86.4 136.8
L0.2 (m) 2.1 3.5 5 6.4 7.9 9.3 > 10
LD-20/1 L=2000 mm
LWA (dB(A)) / 11 21 26.5 31 34.7 40
Δpt (Pa) / 7.5 15 23.7 33 45.5 75.2
L0.2 (m) / 2.5 3.6 4.6 5.7 6.7 7.5
LD-20/2 L=600 mm
LWA (dB(A)) 14 25 31 / / / /
Δpt (Pa) 2 8.3 18.3 / / / /
L0.2 (m) 4.2 9.1 > 10 / / / /
LD-20/2 L=1000 mm
LWA (dB(A)) / 19 24 27.8 31 / /
Δpt (Pa) / 4 8 15 22 / /
L0.2 (m) / 7.1 8.9 > 10 > 10 / /
LD-20/2 L=1500 mm
LWA (dB(A)) / 14.6 20.4 24 27 28.5 32.5
Δpt (Pa) / 2.4 4.7 7.6 13 17 28.5
L0.2 (m) / 4.3 5.3 6.2 7.3 8.1 8.9
LD-20/2 L=2000 mm
LWA (dB(A)) / 11 17 21.5 24 26.3 30.3
Δpt (Pa) / 1.4 2.7 4.2 6.5 8.2 14.4
L0.2 (m) / 2.8 3.5 4.0 4.7 5.3 5.8
222
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
Sound power level, pressure drop and throw distances
Horizontal discharge DT=-5K
Type Q (l/s) 13.9 27.8 41.7 55.6 69.4 83.3 111.1
(m³/h) 50 100 150 200 250 300 400
LD-20/1 L=600 mm
LWA (dB(A)) 20 33.8 41 / / / /
Δpt (Pa) 13.5 35.6 74.8 / / / /
L0.2 (m) 5.1 > 10 > 10 / / / /
LD-20/1 L=1000 mm
LWA (dB(A)) 11 23.2 30 36 / / /
Δpt (Pa) 12 22 43 76 / / /
L0.2 (m) 2.9 6.9 8.8 > 10 / / /
LD-20/1 L=1500 mm
LWA (dB(A)) 8 14.5 25 31 35 37.5 43
Δpt (Pa) 5.5 12.5 25 39.6 55 86.4 136.8
L0.2 (m) 1.6 3.8 4.8 6.6 8.2 9.8 > 10
LD-20/1 L=2000 mm
LWA (dB(A)) / 11 21 26.5 31 34.7 40
Δpt (Pa) / 7.5 15 23.7 33 45.5 75.2
L0.2 (m) / 2.7 3.4 4.7 5.8 7.0 8.1
LD-20/2 L=600 mm
LWA (dB(A)) 14 25 31 / / / /
Δpt (Pa) 2 8.3 18.3 / / / /
L0.2 (m) 7.3 9.1 > 10 / / / /
LD-20/2 L=1000 mm
LWA (dB(A)) / 19 24 27.8 31 / /
Δpt (Pa) / 4 8 15 22 / /
L0.2 (m) / 4.7 7.1 9.3 > 10 / /
LD-20/2 L=1500 mm
LWA (dB(A)) / 14.6 20.4 24 27 28.5 32.5
Δpt (Pa) / 2.4 4.7 7.6 13 17 28.5
L0.2 (m) / 2.8 4.3 5.6 7.0 8.2 9.3
LD-20/2 L=2000 mm
LWA (dB(A)) / 11 17 21.5 24 26.3 30.3
Δpt (Pa) / 1.4 2.7 4.2 6.5 8.2 14.4
L0.2 (m) / 1.8 2.8 3.6 4.5 5.3 6.0
223
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
CIRC
ULA
R D
IFFU
SER
S,
SQUA
RE
DIF
FUSE
RS
SWIR
L D
IFFU
SER
S,
VAR
IAB
LE S
WIR
L
DIF
FUSE
RS
SLOT
DIF
FUSE
RS,
RO
UND
DU
CT D
IFFU
SER
SAI
R D
ISPL
ACEM
ENT
U
NITS
SUPP
LY A
IR N
OZZL
ESEX
TER
NAL
ELEM
ENTS
AIR
FLO
W
CONT
ROL
UNI
TS
SOU
ND A
TTEN
UATO
RS,
SO
UND
ATT
ENUA
TING
LO
UVR
ES
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
L02 (m)
L02 (m)
L02 (m)
L02 (m)
Sound power level, pressure drop and throw distances
Horizontal discharge DT=-10K
Type Q (l/s) 13.9 27.8 41.7 55.6 69.4 83.3 111.1
(m³/h) 50 100 150 200 250 300 400
LD-20/1 L=600 mm
LWA (dB(A)) 20 33.8 41 / / / /
Δpt (Pa) 13.5 35.6 74.8 / / / /
L0.2 (m) 3.5 8.5 > 10 / / / /
LD-20/1 L=1000 mm
LWA (dB(A)) 11 23.2 30 36 / / /
Δpt (Pa) 12 22 43 76 / / /
L0.2 (m) 2 4.9 8.1 > 10 / / /
LD-20/1 L=1500 mm
LWA (dB(A)) 8 14.5 25 31 35 37.5 43
Δpt (Pa) 5.5 12.5 25 39.6 55 86.4 136.8
L0.2 (m) 1.1 2.6 4.4 5.9 7.3 9.1 > 10
LD-20/1 L=2000 mm
LWA (dB(A)) / 11 21 26.5 31 34.7 40
Δpt (Pa) / 7.5 15 23.7 33 45.5 75.2
L0.2 (m) / 1.9 3.1 4.2 5.3 6.6 7.5
LD-20/2 L=600 mm
LWA (dB(A)) 14 25 31 / / / /
Δpt (Pa) 2 8.3 18.3 / / / /
L0.2 (m) 3.4 4.3 7.74 / / / /
LD-20/2 L=1000 mm
LWA (dB(A)) / 19 24 27.8 31 / /
Δpt (Pa) / 4 8 15 22 / /
L0.2 (m) / 2.5 4.5 6.7 9.7 / /
LD-20/2 L=1500 mm
LWA (dB(A)) / 14.6 20.4 24 27 28.5 32.5
Δpt (Pa) / 2.4 4.7 7.6 13 17 28.5
L0.2 (m) / 1.5 2.7 4.0 5.8 6.9 8.3
LD-20/2 L=2000 mm
LWA (dB(A)) / 11 17 21.5 24 26.3 30.3
Δpt (Pa) / 1.4 2.7 4.2 6.5 8.2 14.4
L0.2 (m) / 1.0 1.8 2.6 3.8 4.5 5.4
Definition of symbols
LWA (dB(A)) Sound power levelDpt (Pa) Total pressure dropL0.2 (m) Isothermal throw length of supply air jet, when its speed drops down to 0.2 /s
224
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
Sound power level, pressure drop and throw distances
Vertical discharge DT=0K
Type Q (l/s) 13.9 27.8 41.7 55.6 69.4 83.3 111.1
(m³/h) 50 100 150 200 250 300 400
LD-20/1 L=600 mm
LWA (dB(A)) 20 33.8 41 / / / /
Δpt (Pa) 13.5 35.6 74.8 / / / /
L0.2 (m) 5.2 > 10 > 10 / / / /
LD-20/1 L=1000 mm
LWA (dB(A)) 11 23.2 30 36 / / /
Δpt (Pa) 12 22 43 76 / / /
L0.2 (m) 3.2 7.4 9.4 > 10 / / /
LD-20/1 L=1500 mm
LWA (dB(A)) 8 14.5 25 31 35 37.5 43
Δpt (Pa) 5.5 12.5 25 39.6 55 86.4 136.8
L0.2 (m) 1.5 3.9 6.6 9.8 > 10 > 10 > 10
LD-20/1 L=2000 mm
LWA (dB(A)) / 11 21 26.5 31 34.7 40
Δpt (Pa) / 7.5 15 23.7 33 45.5 75.2
L0.2 (m) / 2.6 4.6 6.6 9 > 10 > 10
LD-20/2 L=600 mm
LWA (dB(A)) 14 25 31 / / / /
Δpt (Pa) 2 8.3 18.3 / / / /
L0.2 (m) 2.7 5.4 8.8 / / / /
LD-20/2 L=1000 mm
LWA (dB(A)) / 19 24 27.8 31 / /
Δpt (Pa) / 4 8 15 22 / /
L0.2 (m) / 3 5.4 7.2 8.9 / /
LD-20/2 L=1500 mm
LWA (dB(A)) / 14.6 20.4 24 27 28.5 32.5
Δpt (Pa) / 2.4 4.7 7.6 13 17 28.5
L0.2 (m) / 3.3 4.6 6.1 7.7 9.4 > 10
LD-20/2 L=2000 mm
LWA (dB(A)) / 11 17 21.5 24 26.3 30.3
Δpt (Pa) / 1.4 2.7 4.2 6.5 8.2 14.4
L0.2 (m) / 1.9 2.6 3.4 4.2 5.1 7.1
225
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
CIRC
ULA
R D
IFFU
SER
S,
SQUA
RE
DIF
FUSE
RS
SWIR
L D
IFFU
SER
S,
VAR
IAB
LE S
WIR
L
DIF
FUSE
RS
SLOT
DIF
FUSE
RS,
RO
UND
DU
CT D
IFFU
SER
SAI
R D
ISPL
ACEM
ENT
U
NITS
SUPP
LY A
IR N
OZZL
ESEX
TER
NAL
ELEM
ENTS
AIR
FLO
W
CONT
ROL
UNI
TS
SOU
ND A
TTEN
UATO
RS,
SO
UND
ATT
ENUA
TING
LO
UVR
ES
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
Sound power level, pressure drop and throw distances
Vertical discharge DT=+5K
Type Q (l/s) 13.9 27.8 41.7 55.6 69.4 83.3 111.1
(m³/h) 50 100 150 200 250 300 400
LD-20/1 L=600 mm
LWA (dB(A)) 20 33.8 41 / / / /
Δpt (Pa) 13.5 35.6 74.8 / / / /
L0.2 (m) 3.9 > 10 > 10
LD-20/1 L=1000 mm
LWA (dB(A)) 11 23.2 30 36 / / /
Δpt (Pa) 12 22 43 76 / / /
L0.2 (m) 2 5.1 8.6 > 10 / / /
LD-20/1 L=1500 mm
LWA (dB(A)) 8 14.5 25 31 35 37.5 43
Δpt (Pa) 5.5 12.5 25 39.6 55 86.4 136.8
L0.2 (m) 1.2 3 5.1 7.5 > 10
LD-20/1 L=2000 mm
LWA (dB(A)) / 11 21 26.5 31 34.7 40
Δpt (Pa) / 7.5 15 23.7 33 45.5 75.2
L0.2 (m) / 2.1 3.6 5.2 7 9.1 > 10
LD-20/2 L=600 mm
LWA (dB(A)) 14 25 31 / / / /
Δpt (Pa) 2 8.3 18.3 / / / /
L0.2 (m) 2.3 5.9 > 10 / / / /
LD-20/2 L=1000 mm
LWA (dB(A)) / 19 24 27.8 31 / /
Δpt (Pa) / 4 8 15 22 / /
L0.2 (m) / 3 5.4 7.2 8.4 / /
LD-20/2 L=1500 mm
LWA (dB(A)) / 14.6 20.4 24 27 28.5 32.5
Δpt (Pa) / 2.4 4.7 7.6 13 17 28.5
L0.2 (m) / 1.85 3.1 4.5 6.2 7.9 > 10
LD-20/2 L=2000 mm
LWA (dB(A)) / 11 17 21.5 24 26.3 30.3
Δpt (Pa) / 1.4 2.7 4.2 6.5 8.2 14.4
L0.2 (m) / 1.6 2.2 3.2 4.3 5.4 8
226
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
Sound power level, pressure drop and throw distances
Vertical discharge DT=+10K
Type Q (l/s) 13.9 27.8 41.7 55.6 69.4 83.3 111.1
(m³/h) 50 100 150 200 250 300 400
LD-20/1 L=600 mm
LWA (dB(A)) 20 33.8 41 / / / /
Δpt (Pa) 13.5 35.6 74.8 / / / /
L0.2 (m) 2.6 6.3 > 10 / / / /
LD-20/1 L=1000 mm
LWA (dB(A)) 11 23.2 30 36 / / /
Δpt (Pa) 12 22 43 76 / / /
L0.2 (m) 1.5 3.6 6.2 8.8 / / /
LD-20/1 L=1500 mm
LWA (dB(A)) 8 14.5 25 31 35 37.5 43
Δpt (Pa) 5.5 12.5 25 39.6 55 86.4 136.8
L0.2 (m) 1.5 2 3.3 4.8 6.5 8.3 > 10
LD-20/1 L=2000 mm
LWA (dB(A)) / 11 21 26.5 31 34.7 40
Δpt (Pa) / 7.5 15 23.7 33 45.5 75.2
L0.2 (m) / 1.4 2.4 3.4 4.6 5.8 8.5
LD-20/2 L=600 mm
LWA (dB(A)) 14 25 31 / / / /
Δpt (Pa) 2 8.3 18.3 / / / /
L0.2 (m) 1.5 4.5 8.2 / / / /
LD-20/2 L=1000 mm
LWA (dB(A)) / 19 24 27.8 31 / /
Δpt (Pa) / 4 8 15 22 / /
L0.2 (m) / 2 3.6 5.3 7.4 / /
LD-20/2 L=1500 mm
LWA (dB(A)) / 14.6 20.4 24 27 28.5 32.5
Δpt (Pa) / 2.4 4.7 7.6 13 17 28.5
L0.2 (m) / 1.1 2.1 3.3 4.6 6.1 9.2
LD-20/2 L=2000 mm
LWA (dB(A)) / 11 17 21.5 24 26.3 30.3
Δpt (Pa) / 1.4 2.7 4.2 6.5 8.2 14.4
L0.2 (m) / 0.7 1.3 2.1 3 3.9 6.1
227
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
VENT
ILAT
ING
GRIL
LES,
VE
NTIL
ATIN
G VA
LVES
CIRC
ULA
R D
IFFU
SER
S,
SQUA
RE
DIF
FUSE
RS
SWIR
L D
IFFU
SER
S,
VAR
IAB
LE S
WIR
L
DIF
FUSE
RS
SLOT
DIF
FUSE
RS,
RO
UND
DU
CT D
IFFU
SER
SAI
R D
ISPL
ACEM
ENT
U
NITS
SUPP
LY A
IR N
OZZL
ESEX
TER
NAL
ELEM
ENTS
AIR
FLO
W
CONT
ROL
UNI
TS
SOU
ND A
TTEN
UATO
RS,
SO
UND
ATT
ENUA
TING
LO
UVR
ES
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
L 02 (m
)
L 02 (m
)
Sound power level, pressure drop and throw distances
Vertical discharge DT=+15K
Type Q (l/s) 13.9 27.8 41.7 55.6 69.4 83.3 111.1
(m³/h) 50 100 150 200 250 300 400
LD-20/1 L=600 mm
LWA (dB(A)) 20 33.8 41 / / / /
Δpt (Pa) 13.5 35.6 74.8 / / / /
L0.2 (m) 1.8 4.5 7.9 / / / /
LD-20/1 L=1000 mm
LWA (dB(A)) 11 23.2 30 36 / / /
Δpt (Pa) 12 22 43 76 / / /
L0.2 (m) 1.1 2.6 4.3 5.1 / / /
LD-20/1 L=1500 mm
LWA (dB(A)) 8 14.5 25 31 35 37.5 43
Δpt (Pa) 5.5 12.5 25 39.6 55 86.4 136.8
L0.2 (m) 1.1 1.4 2.4 3.5 4.6 6 8.8
LD-20/1 L=2000 mm
LWA (dB(A)) / 11 21 26.5 31 34.7 40
Δpt (Pa) / 7.5 15 23.7 33 45.5 75.2
L0.2 (m) / 1 1.6 2.4 3.3 4.2 6.1
LD-20/2 L=600 mm
LWA (dB(A)) 14 25 31 / / / /
Δpt (Pa) 2 8.3 18.3 / / / /
L0.2 (m) 1.2 3.1 5.6 / / / /
LD-20/2 L=1000 mm
LWA (dB(A)) / 19 24 27.8 31 / /
Δpt (Pa) / 4 8 15 22 / /
L0.2 (m) / 1.6 2.4 3.7 5.3 / /
LD-20/2 L=1500 mm
LWA (dB(A)) / 14.6 20.4 24 27 28.5 32.5
Δpt (Pa) / 2.4 4.7 7.6 13 17 28.5
L0.2 (m) / 1 1.5 2.3 3.2 4.2 6.3
LD-20/2 L=2000 mm
LWA (dB(A)) / 11 17 21.5 24 26.3 30.3
Δpt (Pa) / 1.4 2.7 4.2 6.5 8.2 14.4
L0.2 (m) / 0.6 0.9 1.5 2.1 2.8 4.2
Definition of symbols
LWA (dB(A)) Sound power levelDpt (Pa) Total pressure dropL0.2 (m) Isothermal throw length of supply air jet, when its speed drops down to 0.2 m/s
228
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
L WA (dB(A))
L WA (dB(A))
L WA (dB(A))
L WA (dB(A))
100
LD-19/1
∆p t
(Pa
)
Q (m /h) 3 150 200 300
5
10
20
4050
100
200L=600mm 1500 2000
500 1000700
1000
30
2
100
LD-19/2
∆p t
(Pa
)
Q (m /h) 3 150 200 300
5
10
20
4050
100
200L=600mm
1500
2000
500 1000700
1000
30
2
50
45
40
35
45
40
35
30
100
LD-20/1
∆p t
(Pa
)
Q (m /h) 3 150 200 300
5
10
20
4050
100
200L=600mm 1500 2000
500 1000700
1000
30
2
30
25
40
35
100
LD-20/2
∆p t
(Pa
)Q (m /h) 3
150 200 300
5
10
20
4050
100
200L=600mm
1500
2000
500 1000700
1000
30
2
20
25
30
35L WA
(dB(A))
L WA (dB(A))
L WA (dB(A))
L WA (dB(A))
100
LD-19/1
∆p t
(Pa
)
Q (m /h) 3 150 200 300
5
10
20
4050
100
200L=600mm 1500 2000
500 1000700
1000
30
2
100
LD-19/2
∆p t
(Pa
)
Q (m /h) 3 150 200 300
5
10
20
4050
100
200L=600mm
1500
2000
500 1000700
1000
30
2
50
45
40
35
45
40
35
30
100
LD-20/1
∆p t
(Pa
)
Q (m /h) 3 150 200 300
5
10
20
4050
100
200L=600mm 1500 2000
500 1000700
1000
30
2
30
25
40
35
100
LD-20/2
∆pt
(Pa
)
Q (m /h) 3 150 200 300
5
10
20
4050
100
200L=600mm
1500
2000
500 1000700
1000
30
2
20
25
30
35
Sound power level and pressure drop Pressure drop by horizontal discharge and 100 % opened volume control damper
Correction factors applicable to LD-20
LD-20/1 LD-20/2
LengthVolume control damper Volume control damper
open closed open closed
L=600 X 1 X 1.25 X 1 X 1.6
L=1000 X 1 X 1.3 X 1 X 1.8
L=1500 X 1 X 1.4 X 1 X 2
L=2000 X 1 X 1.8 X 1 X 2.3
229
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VENT
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CIRC
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R D
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S,
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DIF
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SWIR
L D
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S,
VAR
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LE S
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L
DIF
FUSE
RS
SLOT
DIF
FUSE
RS,
RO
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DU
CT D
IFFU
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SAI
R D
ISPL
ACEM
ENT
U
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SUPP
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ESEX
TER
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AIR
FLO
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CONT
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SOU
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UATO
RS,
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TING
LO
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ES
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
AI
RAL9010
CD
15 130 15
57
100
18.5
150
230
180
330
280
8.5
32
45.5
72.5
59
86
15 130 15
57
100
18.5
150
230
180
330
280
8.5
32
45.5
72.5
59
86
15 130 15
57
100
18.5
150
230
180
330
280
8.5
32
45.5
72.5
59
86
15 130 15
57
100
18.5
150
230
180
330
280
8.5
32
45.5
72.5
59
86
15 130 15
57
100
18.5
150
230
180
330
280
8.5
32
45.5
72.5
59
86
15 130 15
57
100
18.5
150
230
180
330
280
8.5
32
45.5
72.5
59
86
� Floor Slot Diffusers LD-16N
ApplicationLD-16N floor slot diffusers are a suitable solution for swimming pools and similar rooms with large glass surfaces and windows. They are designed for installati-on in the floor. Warm air is supplied in the upwards direction, towards the window. With appropriate dimensions, proper air supply is guaranteed, free of excessive draught or noise (LWA<35 dB(A)).
DescriptionLD-16N slot diffusers are designed in 1, 2, 3, 4, 5 and 6 slot versions. They are made of fixed aluminium sections and an aluminium structural frame.The diffusers are available in single piece lengths 200 mm to 2000 mm. Painting according to the customer’s specification is available on order.
Advantages• No glass misting• Optimal ventilation• No heat losses• Low pressure drop• Prevents the descent of cold air along
windows• Does not cause heating of air near the
windows even in the sunshine• Easy installation
Versions
single slot LD-16N/1 two slots LD-16N/2 three slots LD-16N/3
four slots LD-16N/4 five slots LD-16N/5 six slots LD-16N/6
230
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
5
10
15
20
25
1000 2000 3000 4000 6000 7000 8000Q (m 3/h)
LD
-16
/1
LD
-1N/2
L D- 16
/3
L D- 16N/4
L D -16N/5
L D -16N/6
5000
LWA < 35 dB(A) ∆pt = 80 Pa/mv ef = 2.5 m/s
L (m
)
v ef
N
6
N
max 0.2m
1
2
3
Ordering key
Installation method
Fast selection diagramLwA < 35 dB(A); Vef =2,5 m/s; Dpt = 16 Pa
1 glass2 LD-16N slot diffuser3 air supply channel
Example
The available floor area next to the glass surface is 15 m in length. The calculated supplied air flow rate is 4000 m³/h. From the diagram, the type: LD-16N/3 L=15m is selected.
Q (m³/h) Air flow rateLWA (dB(A)) Sound power levelΔpt (Pa) Pressure dropL (m) Slot diffuser lengthvef (m/s) Effective air velocity
LD-16N / 1 / L / n
Note:Standard colour is RAL 9010.
Number of longitudinal sections (pieces)
Single piece length (L = 200, 300, …, 2000)
1 Number of slots23456
LD-16N Floor slot diffuser
231
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G VA
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CIRC
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R D
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S,
SQUA
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DIF
FUSE
RS
SWIR
L D
IFFU
SER
S,
VAR
IAB
LE S
WIR
L
DIF
FUSE
RS
SLOT
DIF
FUSE
RS,
RO
UND
DU
CT D
IFFU
SER
SAI
R D
ISPL
ACEM
ENT
U
NITS
SUPP
LY A
IR N
OZZL
ESEX
TER
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ELEM
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AIR
FLO
W
CONT
ROL
UNI
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SOU
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TTEN
UATO
RS,
SO
UND
ATT
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LO
UVR
ES
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
St
RAL9010
8
7
6
m
1
2
3
4
5 C3
A
H
9
φ D
φ
8
7
6
� Panel design slot diffusers LDP-13, LDP-14
ApplicationPanel design slot diffusers are designed for the supply of air in rooms with floor to ceiling heights from 2.4 m to 4 m. They are suitable for supplying either cold or warm air.
DescriptionLDP-13 and LDP-14 consists of a diffuser face plate and a plenum box. The diffuser face plate is commonly made of sheet steel and its design can be suited to the customer’s requirements. Longitudinal guides, fitting tight to the sheet steel, are inserted in the diffuser face plate. Cylindri-cal deflectors, made of recycled plastics (ABS-antistatic) are installed in the guides, to allow free adjustment of both air jet discharge direction and flow rate. The number of slots per unit depends on the size of the unit. Diffuser face plate is pow-der painted in a RAL 9010 scale colour, or, on special orders, in other colours. The deflectors, equal to those of LD-13 or LD-14 slot diffusers, are white or black as standard. The plenum box is made of galvanised sheet steel. It is fitted with a flow rate control damper, designed for fine air flow rate adjustment.
Type• LDP-13 m = 12 mm• LDP-14 m = 22 mm
1 Plenum box2 Volume control damper3 Inlet spigot4 Cross member5 Diffuser face plate6 Guide7 Air deflector8 Spring clamp
LDP-13 LDP-14
Size фC3 Slot length фA фD H No. of slots h No. of slots h
400 395 300 370 198 320 8
25
6
40500 495 400 470 198 320 10 6
600 595 500 570 248 380 12 8
625 620 500 570 248 380 12 8
232
IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
Ordering key
Special ordersOn special order, we can deliver diffuser face plates of any design. The shape and dimensions are specified in agreement with the designer or customer.
Technical dataTecnical data are determined upon the definition of the shape, design, number of discharge slots and other factors.
Fast flow rate determination (at LWA < 35 dB(A))LPD-13: flow rate per 1 meter length
≈100 m³/hLPD-14: flow rate per 1 meter length
≈150 m³/h
Size (400, 500, 600, 625)
I5 Thermal insulation (polyethylene), 5 mm thick, on the outside of the plenum boxI9 Sound and thermal insulation (from -40 °C to 105 °C), 9 mm thick, on the outside of the plenum box
(synthetic rubber based material)I19 Sound and thermal insulation (from -40 °C to 105 °C), 19 mm thick, on the outside of the plenum box
(synthetic rubber based material)
M Volume control damper
K Plenum box
B Black deflectorsW White deflectors
LDP-13LDP-14
LDP-13/B/K/M/I Size 400
Note:• Please specify the deflector colour in your order. • Versions with insulation on the inside of the plenum box are also available.
233
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G VA
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CIRC
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R D
IFFU
SER
S,
SQUA
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DIF
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RS
SWIR
L D
IFFU
SER
S,
VAR
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LE S
WIR
L
DIF
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RS
SLOT
DIF
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RS,
RO
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IMP Klima
Slot diffusers, Round duct diffusersSlot diffusers
St
RAL9010
Dφ
60 60L
Lv 60L
Lv
L5
LvL
60
d
23 1
LD L LV
/ 1000 800
1505 750 2 X 500
1755 875 2 X 600
2005 1000 2 X 800
� Round Duct Diffuser SKD-13
ApplicationRound duct diffusers SKD-13 are designed for supplying air to the rooms with large floor to ceiling heights, e.g. conference halls, gyms, industrial halls etc. They can be installed at any location wi-thin the duct network, which renders them suitable for supplying of either hot or cold air.The T register model is designed to control the supply air flow-rate at the individual diffuser level. The T register design is recom-mended for installations with several round duct diffusers in one line. In such cases, the flow-rates of the diffusers near the line beginning should be slightly reduced, in order to supply adequate amounts of air to the diffusers farther along the line.
DescriptionThe duct diffuser consists of galvanised round cross-section tubes with inserted longitudinal guides, fitting tight into the tubes. Cylindri-cal deflectors made of recycled plastics are inserted into the guides, to allow continuous adjustment of discharged air direction within the 360o range. Diffusers are available with different number of slots. The tube is painted in a RAL 9010 scale colour, or, on special orders, in other colours. The deflectors, equal to those of LD-13 slot diffusers, are white or black as standard. A T register, made of galvanised sheet steel, is inserted in the SKD--13D/T. The T register The setting piece is adjusted with a gear mo-ved using a straight screwdriver. The gear can be accessed through a hole in the cover.
Diffuser structure for lengths exceeding 1000 mm
Note: фD is the diffuser internal diameter.
Round duct diffusers
1. SKD-13D2. T-register3. Gear
234
IMP Klima
Slot diffusers, Round duct diffusersRound duct diffusers
Lv
L
H
60
Ød Ød Ød
4020
4040
407
L
r
7
Ød Ød Ød
4020
4040
407
L
r
7
Ød Ød Ød
4020
4040
407
L
r
7
L L 87
φD
L40 407
SKD-13/D Joining piece Tube Joining piece SKD-13/D
Installation of SKD-13/D
SKD-13/RSKD-13/R is constructed for installations into round ducts with square openings.
L LV H No. of slots
ΦD of tube
Openings
L-35 H-35
580 500 100 1 150-355 545 65
680 600 150 2 355-900 645 115
880 800 200 3 600-2400 845 165
880 800 250 4 600-2400 845 215
Accessories
Size d L,r
150 148.7 – 149.3 150
160 158.7 – 159.3 160
180 178.6 – 179.3 180
200 198.6 – 199.3 200
224 222.5 – 223.3 224
250 248.5 – 249.3 250
280 278.4 – 279.3 280
300 298.4 – 299.3 300
315 313.4 – 314.3 315
355 353.3 – 354.3 355
400 398.3 – 399.3 400
450 448.2 – 449.3 450
500 498.2 – 499.3 500
560 558.1 – 559.3 560
630 628.1 – 629.3 630
710 708.0 – 709.3 710
800 798.1 – 799.3 800
900 897.0 – 899.3 900
Elbow 900
Joining piece
End cover
Installation of SKD-13/R:
Note: фd is the external diameter.
235
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CIRC
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IFFU
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S,
SQUA
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DIF
FUSE
RS
SWIR
L D
IFFU
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S,
VAR
IAB
LE S
WIR
L
DIF
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SLOT
DIF
FUSE
RS,
RO
UND
DU
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SUPP
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LO
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IMP Klima
Slot diffusers, Round duct diffusersRound duct diffusers
Ordering key SKD-13D
Note:• Please specify the deflector colour in your order. Other colours on customer's
request.
Types of discharge
Heating – vertical 90°Cooling – one sided – right (horizontal)Cooling – one sided left (horizontal)
For determination of air velocity data at different throw distances and temperature differences, please use software for air distribution elements calculation KLIMA ADE.
Cooling – two-sided horizontal discharge Cooling – alternate sided horizontal discharge
Length
Number of slots
Tube diameter
T-register
B Black deflectorsW White deflectors
Tube
SKD-13D /B /T /ф355 /2 L=1000 mm
Ordering key SKD-13R
Length
Number of slots
Tube diameter
T-register
B Black deflectorsW White deflectors
R Diffuser designed for installation into round ducts
SKD-13R /B /T /ф355 /2 L=680 mm, H=150 mm
Example accessory specification:
Accessory: Elbow 900Colour: RAL 9010Quantity: 1 piece
236
IMP Klima
Slot diffusers, Round duct diffusersRound duct diffusers
Pipe length Ld [mm](Slot length Lv [mm])
No. of slots Lwa[dB(a)]
Recommended air flow volume [m³/h]
150, 160, 180 200, 224, 250 280, 300, 315, 355 400, 450 500, 560 630, 710, 800, 900
1000 (800)
2 26 128 128 128 128 128 128
4 30 256 256 256 256 256 256
6 34 384 384 384 384
8 35 512 512 512
10 36 640 640 640
12 37 768 768
14 38 896 896
1505 (2 x 500)
2 35 160 160 160 160 160 160
4 38 320 320 320 320 320 320
6 40 480 480 480 480
8 41 640 640 640
10 46 800 800 800
12 46 960 960
14 47 1120
1755 (2 x 600)
2 30 192 192 192
4 32 384 384 384
6 33 576 576
8 35 768
10 38 960
2005 (2 x 800)
2 30 256 256 256
4 32 512 512 512
6 34 768 768
8 37 1024
10 40 1280
Other dimensions are available on request.
The recommended air flow is 80 m³/h m per meter of active slot length.
Pressure drop determination diagram
v air jet velocity in the duct
237
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VENT
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G VA
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CIRC
ULA
R D
IFFU
SER
S,
SQUA
RE
DIF
FUSE
RS
SWIR
L D
IFFU
SER
S,
VAR
IAB
LE S
WIR
L
DIF
FUSE
RS
SLOT
DIF
FUSE
RS,
RO
UND
DU
CT D
IFFU
SER
SAI
R D
ISPL
ACEM
ENT
U
NITS
SUPP
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IR N
OZZL
ESEX
TER
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ELEM
ENTS
AIR
FLO
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CONT
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LO
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ES
IMP Klima
160
140
120
1009080
70
60
50
40
1
2
3
4
5
6
30
5 10 15 20 25 30
5
10
10 15 20 25 30 40
V [
m /
hm sl
ot]
v [
m/s
]du
ct3
Total pressure p [Pa] at the SKD-13 diffuser
without T register
with T register
15 20 25 30 35 40
15 20 3025 35 40
25 30 35 40 45 50
35 40 45 50 55 60
Slot diffusers, Round duct diffusersRound duct diffusers