PANDAPAN341

“PositiveandNegativeDuctworkAccreditation”DuctLeakageTester

PANDA PAN341“Positive and Negative Ductwork Accreditation”

Quantifies air leakage in commercialductwork

Generates a PASS/FAIL result

PANDA 341Duct Leakage Tester

1. Whytestforductleakage?2. Whatarethestandards?3. Whoarethecustomersandhowtoapproachthem?4. Howdoesitwork?5. Featuresandbenefits

Why Test For Duct Leakage?

+ Noductsystemisairtight

+ Asleakageincreases,moreairandenergyarerequiredtomaintaindesignconditions

• Increasesoperatingcosts

• Unabletomeetdesignairfloworcomfortparameters(tempandRH)

Why Test For Duct Leakage?

+ Unwantedcontaminantsmigratingtootherareas

• Laboratoryexhaust

• Industrialprocesses

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Why Test For Duct Leakage?

+ Meetregionalstandardsorrequirements

• Localcodes

• Architecturalengineeringplans

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EN

Standards+ Europe

• DW/143• Eurovent 2/2• EN1507• EN12237• EN13779

+ NorthAmerica• SMACNA(SheetMetalAndAirConditioningContractorsNationalAssociation)- HVACAirDuctleakageTestManual

European Standards

+ MaximumAllowableleakagerateperunitareaofductSurfaceaccordingtoAirTightnessClass

Air Tightness Class

Static Pressure Limit (ps) Pa

Air Leakage Limit (fmax) m3.s-1.m-2 Positive Negative

A 500 500 0.027 ∗ 0.65

1000

B 1000 750 0.009 ∗ 0.65

1000

C 2000 750 0.003 ∗ 0.65

1000

D* 2000 750 0.001 ∗ 0.65

1000

* Class D ductwork is only for special apparatus

North America Standards

+ DuctworkclassificationfromSMACNA+ MaximumAllowableleakagerateperunitarea(100Sq.ft.)ofductSurfaceAreaaccordingtoLeakageClass

APPLICABLE LEAKAGES CLASSES , SMACNA Standard

DUCT CALSS 1/2", 1", 2" W. G. 3" W. G. 4", 6", 10" W. G.

SEAL CLASS C B A

SEALING APPLICABLE

TRANSVERSE JOINTS ONLY

TRANSVERSE JOINTS AND SEAMS

JOINTS, SEAMS AND ALL WALL PENETRATIONS

LEAKAGE CLASSRECTANGULAR 

METAL 24 12 6

ROUND METAL 12 6 3

Who Tests for Duct Leakage+ Mechanical/SheetMetalContractors

• InstallHVACsystemcomponentsperengineeringdrawings- Airhandler- Heatingandcoolingcomponents- Ductworkanddampers- Grillesanddiffusers

• DuctleakagetestingisperformedastheductsarebeingconstructedandinstalledintotheHVACsystem- Easyaccesstoductwork- Noobstructions

+ Commissioning• Generallywitnessesleakagetestingandsignsoffonreport

What is a Duct Leakage Test?

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Static Pressure

Air Flow Rate

Leakage means more Air Flow

required!

Fan adjusted to achieve Static

Pressure

PANDASet-up Summary

1. Blank‐offasectionofDucting

2. ConnectFlexibleHosetoPANDA

3. ConnectFlexibleHosetoDucting

4. AdjustPANDAFantoachievetestPressure

5. Put5numbersintotheApplication

6. RuntheTest!

Positive Pressure Test

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+ PositivePressure– HighFlow• ConnecttotheFanOUTLET

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VeryTightSystem?+ PositivePressure– LowFlow

• AttachLowFlowNozzle• ConnecttotheFanINLET

Negative Pressure Test

+ NegativePressure– HighFlow• ConnecttotheFanINLET

VeryTightSystem?+ NegativePressure– LowFlow

• AttachLowFlowNozzle• ConnecttotheFanINLET

Connect to Ductwork+ KeepPANDAflexibleductlengthtoaminimum+ KeepPANDAflexibleductasstraightaspossible+ Makesurebothendconnectionsaresealed+ MakesurePANDAflexibleducthasnoleaks

+ PressureReadingtubefromthePVM610shouldbeconnecteddirectlytotheductworkundertest

+ Blank‐offallOpenEndsincludingtappings andtestholes+ Blankatconvenientplacewitheasyaccess

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Adjust PANDA to Test Pressure

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Pressure Reading

Fan Speed Control

Fan Run/Stop Switch

Two Instruments

1) PVM610

• MeasurestheStaticPressureintheDuct

• Connectthe+porttotheduct

• Leavethe– portopentoatmosphere

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Two Instruments

2) TA465‐P

• MeasurestheAirFlowRate

• MeasurestheAirTemperature

• MeasuresBarometricPressure

• ApplicationCalculatesPASS/FAIL

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TA465-P Flow Connections

+ High FlowTesting

• ConnecttoFLOWGRIDmarkedP1(+)andP2(‐)

+ Low FlowTesting

• ConnecttoNOZZLEmarkedP1(+)andP2(‐)

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Set-up Test Application

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Enter key parameters into TA465-P:1. Surface Area of ductwork section to be tested

Surface Area not Volume or Cross-sectional Area

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+ +

Set-up Test Application

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Enter key parameters into TA465-P:1. Surface Area of ductwork section to be tested

2. Static Pressure of test, as measured by Model PVM610 micromanometer

3. Flow Device as Nozzle or Flow Grid

4. Air Tightness Class A to Da) ‘A’ is the easiestb) ‘D’ is the tightest

5. Test Length, or duration of leakage testa) Minimum recommended time is 5 minutes..

Run the Test+ Click‘START’toRunTest

• Results

PASS: Leak Factor is below Leak Limit

FAIL: Leak Factor is above Leak Limit

Check Ducting for Leaks

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Look – Atblanks,accessopeningsanddifficultjoints

Listen – withtestrigrunning,leaksshouldbeaudible

Feel – runningyourhandoverjointscanhelplocateleaks

SmokePellet– placedinsideductwork(canbecorrosivesoobtainpermission)

ThermalImagingCamera– providesquickandeasyvisualizationofleaks

FAIL: Leak Factor is above Leak Limit

PANDA Set-up Summary

1) Blank‐offasectionofDucting2) ConnectFlexibleHosetoPANDA3) ConnectFlexibleHosetoDucting4) AdjustPANDAFantoachievetestPressure5) Put5numbersintotheApplication6) RuntheTest!

PANDA

• Weight:45kg(99lbs)

• RemovableBox

• RemovableFlexibleDuct

Features and BenefitsPowerfulblowerbuilds‐upthestaticpressurefast

Transportable

Real‐timeresults

UserFriendly

Versatileinstrument

Ruggedindustrialconstruction

Features+ UserFriendly:

• Variablespeedblowermotorcontrol• DirectreadingdigitalInstruments• Builtinductleakageapplications

- Savestime,lessmath+ PASS/FAIL results

• DataLoggingCapability• Nochartsorgraphstoread• Automaticallycorrectforairdensity

+ Powerfulblowerbuilds‐upthestaticpressurefast!!• Allowsforlongerductrunstobetested

- Testupto120mlong,1m2 ductin20minutes+ EasilyswitchfromPositivePressuremodetoNegativePressureMode

• Repositionflexductconnectiononblower+ Easilyswitchfromhighflowmodetolowflow+ Ruggedindustrialconstruction

Thank You!!!

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PANDA PAN341

o Sheet Metal Contractors o Test and Balancerso Commissioning/Acceptance test engineers o HVAC Manufacturerso Design Engineers

Powerful and fast Transportable

Real-time resultsUser Friendly

Versatile instrument Rugged industrial construction..

Ideal for:

PANDA PAN341“Positive and Negative Ductwork Accreditation”

Questions?

Primary Market - New building Installations Target - Meet standards or requirements

EN1507- Requirement for Strength and Leakage Rates of Rectangular Ducts

EN12237- Requirement for Strength and Leakage Rates of Circular Ducts

Defines Maximum Allowable leakage rate per unit Area of Duct Surface

According to 4 Air Tightness Classes

Meet regional standards or requirements Europe

• EN13779Ventilation for buildings - Achieve a good air quality with acceptable installation and running costs

• HVCA DW/143 Ventilation for buildings: Guidance document for Ductwork Leakage Testing

• Eurovent 2/2 Ventilation for buildings: Air Leakage Rate in Sheet Metal Air Distribution Systems

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Air Tightness Class

Static Pressure Limit (ps) Pa

Air Leakage Limit (fmax) m3.s-1.m-2 Positive Negative

A 500 500 0.027 ∗ 0.65

1000

B 1000 750 0.009 ∗ 0.65

1000

C 2000 750 0.003 ∗ 0.65

1000

D* 2000 750 0.001 ∗ 0.65

1000

* Class D ductwork is only for special apparatus

Primary Market - New building Installations Target - Meet standards or requirements

Meet regional standards or requirementsNorth America

• SMACNASheet Metal And Air Conditioning Contractors National Association

HVAC Air Duct leakage Test Manual

Meet regional standards or requirementsNorth America

• SMACNA

- Ductwork classification from SMACNA

- Maximum Allowable leakage rate per unit area (100 Sq. ft.) of duct Surface Area according to Leakage Class

APPLICABLE LEAKAGES CLASSES , SMACNA Standard

DUCT CALSS 1/2", 1", 2" W. G. 3" W. G. 4", 6", 10" W. G.

SEAL CLASS C B A

SEALING APPLICABLE

TRANSVERSE JOINTS ONLY

TRANSVERSE JOINTS AND SEAMS

JOINTS, SEAMS AND ALL WALL PENETRATIONS

LEAKAGE CLASSRECTANGULAR 

METAL 24 12 6

ROUND METAL 12 6 3

Primary Market: New Building Installations Target: Meet standards or requirements Test and Balancing Engineers

o Leak Test the HVAC system before balancing

o Saves time correcting the Balance when leaks are found

o They make more money providing an extra service to meet the standards

o They will get repeat business

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Primary Market: New Building Installations Target: Meet standards or requirements Commissioning/ Acceptance Test Engineers

o Leak Test the HVAC system before other checks

o Saves time checking the Balance when leaks are found

o They make more money providing an extra service of checking that standards are met

o They will get repeat business

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Primary Market: New Building Installations Target: Meet standards or requirements HVAC Manufacturers – Sheet Metal Contractors

o Leak Test the HVAC system before shipping to site

o Leak test the ducting before shipping to site

o Guarantee of product quality and saves time on site

o This will help them win contracts and get repeat business

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Primary Market: New Building Installations Target: Meet standards or requirements Design Engineers and Specifiers

o If Duct Leakage Testing is specified then the test must be carried out!

o This group may not be customers, but they are influencers

o Duct Leakage Testing makes for an Energy Efficient Building

Secondary Market: Existing Installations Target: desire to improve energy performance

o Facilities Management

o HVAC Maintenance Companies

o HVAC Planning Engineers

o Customers of a HVAC system

Additional Market: Special Applications Target: desire to do a tightness test

o Cleanroom builders/installers

o Car and truck manufacturers

o Aerospace (plane tightness test)

o Chimney Manufacturers

o Confined spaces/cabinets

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