CEPE REVIEWER

7/31/2019 CEPE REVIEWER

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Certified Energy PlansExaminer

Presented by:

California Association of u ng nergy onsu tants

Sponsored by:Pacific Gas & Electric Company

1



This program is funded by California utility customers and administered by

,

Utilities Commission.

2 www.pge.com/stockton



a orn a ssoc at on oBuilding Energy Consultants

(877) 530-3045

www.CABEC.org

Presenter: Gina Rodda, CEA, CEPE, LEED AP

Gabel Associates, LLC

3

.

510-428-0803 ex 204



CABEC 2008 Residential Title 24 Energy Code Primer

CABEC 2008 Non Residential Plans Examiner Seminar

4



CEPE Training

This training class is NOT an in-depth review of the NonResidential Energy

Standards. Given the detail of the Standards, that would be a far greater taskthan we can hope to complete.

Rather the class is designed to help you navigate the Standards and learn how

to use the Standards. Do not try to memorize specifics, rather learn where to

find specifics within the Standards and particularly the NonResidential Manual.Please mark, organize and use your printed 2008 Manual (2 nd Quarter) in conjunction with this class.

This class is adequate to help you prepare for the CEPE Exam, but pursuing

further education strongly encouraged.



Testing Date

NonResidential Testing Date:

ovem er , es ng oca ons:

First time and recertification – Sacramento (National University.

First time and recertification – Costa Mesa (National University,3390 Harbor Blvd.)




What can I bring to the testing location?

Paper copies of the:

•2008 NonResidential Com liance Manual,

•2008 Standards and

•2008 Reference Appendices

•CEPE Training Seminar Printout

No electronic devices, i.e. laptops, pda’s. EXCEPT calculators.

Electronic copies of the manual, standards and appendices will be

Recording or copying any part of the test will result in a failing grade

or until the next code release.CABEC 2008 Non Residential Plans Examiner Seminar 7



CEC Telephone Hotline

Your can reach the Energy Hotline on weekdays from 8:00a.m. - noon and 1:00 p.m. – 4:30 p.m.:

- -




Approved Title 24 Programs

EnergyPro 5.1 (anything submitted for permit after July 31, 2010): Energy Soft

LLC www.energysoft.com; 415-897-6400




HERS Providers

Three HERS Providers in California

1. CalCerts www.CalCerts.com

. . .

3. CHEERS www.CHEERS.org

CABEC 2008 Non Residential Plans Examiner Seminar 11




12




13




14



2008 Standards Documents

Energy Commission Documents:

• 2008 Building Energy Efficiency Standards • 2008 Nonresidential Compliance Manual (2 nd quarter)

• 2008 Nonresidential Alternative Calculation Manual

• 2008 Reference Appendices

Available from the Commission Web Site:

• www.energy.ca.gov




Effective Date

A lies to ro ects if the ermit is APPLIED for on or after Januar 1 2010




2008 NonResidential Manual

Ten chapters make up the manual:

• Chapter 1 introduces the Standards and discusses the application and scope.

• Chapter 2 reviews the compliance and enforcement process, including design and the

preparation of compliance documentation through acceptance testing.

• Chapter 3 addresses the requirements for the design of the building envelope.

• Chapter 4 covers the requirements for HVAC systems and water heating systems

• Chapter 5 addresses the requirements for indoor lighting.

• Chapter 6 addresses the requirements for outdoor lighting

• Chapter 7 addresses the requirements for sign lighting (for both indoor and outdoor

app ca ons .

• Chapter 8 addresses the requirements for refrigerated warehouses.


.

• Chapter 10 addresses the acceptance requirements.17



Chapter 1 Introduction

1.4 Why CA Needs Energy Standards:

Electricity Reliability and Demand

Comfort

Environment

Greenhouse Gas Emissions and Global Warning




1.5 What’s New for 2008

New Measures for All Buildings:

1. Electronic Filing : Electronic signature allowed on electronic filings

2. Mandatory: SRI for cool roofs (Solar Reflective Index)

.

New Measures for Non Residential Buildings Only:

4. Prescriptive: Cool roof for steep sloped roofs

5. Mandatory: Roofing products to meet §118

6. Prescri tive: Overall Buildin Envelo e Method

7. Mandatory: Site-Built fenestration

8. Prescriptive: Insulation levels in certain climate zones

9. Acceptance: Updated

10. Mandatory: Demand Control Ventilation expanded

11. Mandatory: Refrigerated Warehouses

12. Mandatory and Prescriptive: Water heating

13. Mandatory: VAV control for single zone variable air volume equipment

14. Mandatory: Expand direct digital control systems to zone level

. rescr p ve: ev se n oor g ng a owances

16. Mandatory: Occupancy sensors has some new requirements

17. Prescriptive: New demand response control credits

18. Prescriptive: Skylights for daylighting

.

20. Mandatory and Prescriptive: New outdoor lighting method for compliance

21. Mandatory and Prescriptive: Sign lighting, indoors and outdoors




1.6 Compliance Approaches

In addition to the mandatory measures (Section 1.6.1), the Standards

provide two basic methods for complying with nonresidential energy

budgets:

the prescriptive approach : If the design fails to meet even one of the

requirements, then the system does not comply with the prescriptiveapproach.

● Envelope, mechanical, indoor lighting and outdoor lighting building

components

the performance approach: annual TDV energy be calculated for theproposed building or space, and must meet or exceed the standard

TDV energy budget (using an approved calculation method).

● Envelope, and/or mechanical can be calculated on their

own… n oor an ou oor g ng cou e nc u e u wou no ecalculated on it’s own.

The mandatory measures must be installed with either method, but note that

mandatory measures may be superseded by more stringent measures under the prescriptive or performance approach .




1.7 Building Types Covered

The Standards do not apply to CBC Group I. This group includes such buildings as hospitals, daycare, nursing

homes, and prisons.




1.7.4 Scope of Improvements Covered

The Standards apply to any new construction that requires a building

permit, whether for an entire building, for outdoor lighting systems, for signs,

or for a modernization.

Until the enforcement agency is satisfied that the building, outdoor lighting,or sign complies with all applicable code requirements, including the

, , ,

occupancy permit).

The Standards apply only to the construction that is the subject of theu ng perm t app cat on w t t e except on o ex st ng spaces t at are

"conditioned“ for the first time, in which case existing envelope components,

and existing lighting systems, whether altered or not, must also show

com liance with the Standards .

Other than for lighting, the Standards apply only to buildings that are directly

or indirectly conditioned by mechanical heating or mechanical cooling.

Section 1.7.17 provides detailed definitions of these terms




1.7.5 Speculative Buildings

Speculative buildings of known occupancy are commonly built by

developers. For example, if a big box retail center or an office

,

the ultimate occupancy of the space but might not know the actualtenants. For this type of building, the owner has several

1. Declare building to be unconditioned space, forcing tenants

to be responsible for envelope, interior lighting, possibly some, .

2. Include envelope compliance.

.

lighting compliance, when those systems are to be installedprior to leasing (Tenant Lease Space lighting allowance).




1.7.6 Mixed Occupancy

Minor Occupancy (exception to §100(f)). When a residential

occupancy is mixed with a nonresidential occupancy the Standards

for each differ.

of the total conditioned floor area , then they may optionally be treated

as if they were of the major occupancy for the purpose of envelope,

HVAC, and water heatin .

Lighting requirements must be met for each occupancy separately.

The mandatory measures applicable to the minor occupancy still

apply.




1.7.8 Hotels and Motels

Compliance is submitted for the features covered in the permit

application only.

Nonresidential areas must meet the envelope, mechanical,

indoor lighting, outdoor lighting, and sign lighting portions of theNonresidential Standards.

Guest room portions of hotels/motels must meet the envelope,

mechanical, and lighting provisions applicable only to

hotels/motel uest rooms. Mandator : 90 ercent of thehotel/motel guest rooms must meet the applicable Lighting

Standards for residential buildings.

, u v u y w

the provisions applicable to that occupancy.




1.7.9 Live Work Spaces

Live-work buildings are a special case of mixed

occupancy buildings, as they combine residential and

nonresidential uses within individual units.

In general, the low-rise or high-rise residential

requirement (depending on the number of habitable

stories) applies since these buildings operate (and

therefore are conditioned 24 hours er da .

Lighting in designated workspaces is required to show

com liance with the Nonresidential Li htin Standards

(§146).




1.7.10 Unconditioned Space

conditioned.

Both the requirements for lighting and minimum skylight

.





30



1.7.11 Newly Conditioned Spaces

When previously unconditioned space becomes

conditioned, the space is then considered an “addition”

and all the building’s components must then comply as

if it were a new building.

or examp e, an uncon one ware ouse s upgraded with a heating system, thus becoming

conditioned space, the building envelope must comply with the current envelope requirements and the lighting system must be brought into

,

including mandatory wiring and switching.




1.7.12 New Construction in Existing Buildings

Tenant improvements, including alterations and repairs

building.

Tenant improvements can include work on the envelope,

e mec an ca , or e g ng sys ems.

The system or systems being installed are considered tobe new construction.




1.7.13 Alterations to Existing Conditioned Spaces

’

system, space conditioning system, indoor lightingsystem, outdoor lighting system, sign, or envelope that is

not an addition.

Alterations or renovations to existing conditioned spaces

have their own set of rules for energy compliance.




1.7.13 Summary of Alterations Rules

1. The Standards apply only to those portions of the systems being altered;untouched portions need not comply with the Standards.

2. If an envelope, indoor lighting, outdoor lighting, or sign lighting alterationincreases the ener use of the altered s stems the alteration must comply with the current Standards.

3. Alterations must comply with the mandatory measures for the changedcomponents.

4. New systems in the alteration must comply with the current Standards.

5. In an existing unconditioned building, outdoor lighting, or sign lightingsystem, altered lighting must meet mandatory measures for the changedli htin com onent.

6. Alterations that increase the connected lighting load or replace more than50 percent of the lighting fixtures (counting existing and new fixtures onlyin the enclosed spaces where light fixture alterations are proposed) must

.

fixture, including installing new ballasts or lamps, without replacing theentire luminaire is not an alteration subject to the alteration requirements.

7. In an existing, unconditioned building where evaporative cooling is added

into compliance with current Standards.




1.7.14 Additions

An addition is any change to a building that increases floor area and conditioned volume.

Additions involve either: the construction of new, conditioned space

and conditioned volume, the installation of space conditioning in apreviously unconditioned space, or the addition of unconditioned

.

The mandatory measures and either the prescriptive or the

.

For conditioned space the heating, lighting, envelope, and water

ea ng sys ems o a ons are rea e e same as or new u ngs.

The only exception to this is if the existing mechanical system(s) are

s mp y ex en e n o e a on.




1.7.15 Changes of Occupancy

action under the Standards.

If changes (alterations) are made to the building,

, .




1.7.16 Repairs

A repair is the reconstruction or renewal of any

maintenance. (and will not require a calculationor mandatory measures).

Repairs shall not increase the preexisting

ener consum tion of the re uiredcomponent, system, or equipment. (if they do,

they are considered an alteration, and will

require a calculation and or mandatorymeasures)


1 7 17 Highlighted Definitions:



1.7.17 Highlighted Definitions:Conditioned Floor Area


This is from the 2008 Residential Manual, but I feel it explains it best.

1.7.17 Highlighted Definitions:



1.7.17 Highlighted Definitions:Directly Conditioned Space

as mec an ca eat ng w a capac y excee ngBtu/(hr-sf),

or has mechanical cooling with a capacity exceeding 5

designed for a process space.





40




7 7 g g dIndirectly Conditioned Space

Indirectly Conditioned Space is enclosed space including, but not

limited to, unconditioned volume in atria, that

(1) is not directly conditioned space; and

(2) either

● a as an area-we g e ea rans er coe c en o rec y

conditioned space exceeding that to the outdoors or to

unconditioned space, or,

● (b) is a space through which air from directly conditioned

spaces is transferred at a rate exceeding three air changes

per hour.

This definition is important because the Standards treat indirectly conditioned space the same as conditioned space.





g gUnconditioned Space

Unconditioned space enclosed space within a building

that is not directly conditioned or indirectly conditioned

space.

Indoor Lighting and Skylight Standards Apply.





g gProcess Space

a space that is designed and thermostatically

,

temperature°

or to maintain a process environmentempera ure

greater than 90°F

Process space is considered UnconditionedSpace: Indoor Lighting and Skylight Standards

pp y.




Questions?




Compliance & Enforcement

1



2.2 The Compliance and Enforcement Process

The process of complying with and enforcing the Building

.

Those involved may include the architect or buildingdesi ner buildin develo ers urchasin a ent

general contractor, subcontractor/installers, energy

consultant, plan checkers, inspectors, realtors, theowner, and third party inspectors (HERS raters).

Communication between these parties is essential for

the compliance/enforcement process to run efficiently.

CABEC 2008 Non Residential Plans Examiner Seminer 2



2.2.1 Design Phase - Certificate of Compliance

During the design phase the plans and specifications

will be constructed or installed. The design must

ncorpora e ea ures a are n comp ance w

applicable codes and standards. The building or

system overa es gn must e eta e n t e

construction documents and specifications, and these

documents must be submitted to the enforcementagency for approval.


2.2.2 Permit Application - Certificate of C li



Compliance

A Certificate of Compliance is required to be submitted

,

documents must be approved by the enforcementa enc .

For all buildings, the Certificate(s) of Compliance must

the Business and Professions Code to accept

conformance with the building energy code.




2.2.5 Construction Phase - InstallationC ifi



Certificate


2 2 6 A T i C ifi f A



2.2.6 Acceptance Testing - Certificate of Acceptance


2.2.7 HERS Verification – Certificate of FieldV ifi i d Di i T i



Verification and Diagnostic Testing

When single-zone, constant volume air distribution

,

more than 25 percent of the system duct area located

n uncon one space, uc sea ng s prescr p ve y

required.

Duct sealing and testing is the only NonResidential

HERS measure. There are numerous Residential

HERS measures but they can not be used with the

NonRes Standards.


2 2 8 2 4 5



2.2.8 – 2.4.5

2.2.8 Final inspection by the enforcement agency and issuance of thecertificate of occupancy

2.2.9 Occupancy permit

2.2.10 Occupancy – compliance, operating and maintenance information

2.3 Compliance documentation

2.3.1 Construction documents

2.3.2 Signing responsibilities

2.4 Roles and responsibilities

2.4.3 Permit applicant responsibilities

2.4.4 Plans examiner responsibilities

2.4.5 Field inspector responsibilities


Questions?



Questions?

CABEC 2008 Non Residential Plans Examiner Seminer



Building Envelope

1

3 1 Overview



3.1 Overview

3.1 Overview

3.3 Opaque Envelope Insulation

.

3.5 Infiltration and Air Leakage

3.6 Relocatable Public School Buildings

3.7 Overall Envelope Approach

3.8 Performance Approach

3.9 Additions and Alterations

3.10 Compliance Documentation


Envelope Compliance Methods



Envelope Compliance Methods

3.1.1 Prescriptive Component Envelope Approach

Each of the envelope assemblies (walls, roofs, floors, windows, andskylights) must comply individually with its requirement.

If one component of the envelope does not comply, the entire envelope does

not comply.

. .

Treats envelope components as a system and offers the ability to makesimple trade-offs between envelope components.

3.1.3 Performance Approach

When the performance approach is used for the envelope only, the computer model deals with the energy efficiency of the entire envelope under both

ea ng an coo ng con ons.

If the envelope is combined with other parts of the building for energycompliance, then more trade-offs can be made.


3.1.4 What is new in 2008



3.1.4 What is new in 2008

A new section [§143(c)] reduces the prescriptive area threshold for skylights in largeenclosed spaces in low-rise nonresidential buildings from 25,000 square feet down to

8,000 square feet.

The building plans must show all skylit and primary sidelit areas that total more than

2,500 sf in an enclosed space (room) (§131(c)2B&C).

A new prescriptive requirement for steep-sloped roofing products (cool roof).

The overall building envelope method has been revised to combine heating and

cooling and to provide simplified trade-offs for roofing alterations.

anges o s e- u enes ra on requ remen s nc u ng e new omponen

Modeling Approach (CMA) certification and changes to CEC default values.

Revised prescriptive roof, wall, and floor insulation requirements in certain climate

zones.

The alteration requirements for roofing products have been changed.

-

products.


3.2 Fenestration



3

3.2.1 Mandatory Measures

The mandatory measures for doors, windows, and skylights address the air--

determined.(Unframed glass doors and fire doors are the two exceptions to theseair leakage requirements.)

Fenestration products must be labeled with a U-factor and SHGC, and the

product meets the air infiltration requirements of §116(a)

As the plans examiner or the Title 24 consultant you don’t need to know much about

this section other than the compliance documents use either reasonableper ormance va ues a u gmen exper ence ca or e e au va ues oU-factor and SHGC values.

Option 1: For buildings with less than 10,000 ft2 of site-built fenestration mayoptionally use either CEC Default Tables 116-A and 119-B, NFRC rating usingNFRC 100 or 200 procedure, or the Alternative equation in Reference

Nonresidential Appendix NA6.

Option 2: For buildings with greater 10,000 ft2 of site-built fenestration: NFRC-

116-B


3.2.2 Window Prescriptive Requirements



3.2.2 Window P esc iptive Requi ements

1. Maximum area

2. Maximum U-factor

3. Maximum relative solar heat gain


Keys to getting the areas correct



y g g

rough opening dimensions.

For glass doors, also use the rough opening area, except where the

door glass area is less than 50% of the door, in which case the

,plus two inches added to all four sides of the glass.


Envelope Component Glazing Areas



p p g

The total window area may not exceed 40% of the gross wall area or:

Optionally, the maximum area may be determined by multiplying

the length of the display perimeter (see definition below in this

section) by 6 ft in height and use the larger of the product of thatmultiplication or 40% of gross wall area.

Display perimeter is the length of an exterior wall in a Group B;

Group F, Division 1; or Group M occupancy that immediately

abuts a ublic sidewalk, measured at the sidewalk level for eachstory that abuts a public sidewalk.

Glazing in a demising wall does not count toward the total building

.

demising walls, but it must meet the U-factor and relative solar heat gain (RSHG) requirements for the climate zone.




What direction does it face? North = NE but not NW

West = NW but not SW

CABEC 2008 Non Residential Plans Examiner

Seminar

9

Window U-factor




Relative Solar Heat Gain (RSHG)



Note also that the RSHG limitation allows credit

an overhang, it must extend beyond both sides

of the window jamb by a distance equal to the

overhang projection (§143(a)5Cii).

This would occur naturall with a continuouseave overhang but may require special

attention in some designs. See Section 3.2.6

for more information on RSHG.


3.2.3 Skylight Prescriptive EnvelopeRequirements



As with windows, there are three aspects of the envelope

component approach for skylights:

1. Maximum area

2. Maximum U-factor

3. Maximum solar heat gain coefficient


Skylight Areas



The maximum area limit for skylights is 5% of the gross exterior roof area.

This effectively prevents large skylights under the envelope component

approach. The limit increases to 10% for buildings with an atrium over 55 ft

high (The 10% skylight allowance is not allowed for atriums unless they also

meet the smoke control requirement).

.

The standards allow the daylighting area requirements for spaces affected by

§143(c) to be fulfilled by using a combination of skylights and windows. Onemay choose to provide all daylighting through windows alone, skylights alone

or a combination of both. The standards prohibit double-counting of daylit

area that may be served by multiple skylights or windows due to close

spacing of the skylights or windows. Areas that are skylit shall have a

minimum skylight area to skylit area ratio of at least 3.3% or minimum skylight

effective aperture of at least 1.1%


Skylight U-factor/SHGC



If the designer failed to provide the mounting method information on the plans and a glass skylight is installed,compliance shall be determined by assuming that the skylight must meet the requirements for skylights with a

curb.

All plastic skylights types are assume to meet the requirements for plastic skylights with a curb.


Skylight U-factor



1. When skylights are specified, the designer must also calculate the skylit

ay g area. e o a o e s y ay g areas n a room excee

2,500 sf the skylit daylight area must be drawn on the plans. You willneed to re uire desi ners to show the calculations OR the da li ht area

on the plans. More on this later in the lighting section.

. .

Without that information you can not definitively determine the U-factors or

the SHGC.


3.2.4 Prescriptive Daylighting Controls for Skylightsin large spaces



Prescriptively required for skylights in enclosed spaces (conditioned or unconditioned)

larger than 8000 SF,

directly under a roof,

has a ceiling height greater than 15 ft,

in climates ones 2-15

general lighting system with a lighting power density greater than 0.5 W/ft2

Exemptions:

Auditoriums, churches, movie theaters, museums, and refrigerated warehouses


3.2.5 Min. Skylight Area in large spaces



Required for skylights in enclosed spaces (conditioned or unconditioned):

1. In climate zones 2 through 15

². ,

3. Directly under a roof

5. A lighting power density for general lighting equal to or greater than

0.5 w/ft²


3.2.5 Min. Skylight Area (large spaces)



A. Daylit area must be at least ½ of the floor area under the skylights, and this area mustbe shown on the plans

.

area ratio of at least 3.3 % or minimum skylight effective aperture of at least 1.1 %.

C. Have a glazing material or diffuser that has a measured haze value greater than 90%.

In addition conditioned s aces will enerall needs dual lazin unconditioned can

use single glazing.

D. Controls must meet mandatory requirements of §131(c)2

Exemptions:

Auditoriums, churches, movie, theaters, museums, and refrigerated warehouse.

In buildings with unfinished interiors in which future enclosed spaces are planned to

have ≤8,000 ft2 of floor area, or ceiling heights less than or equal to 15 feet, based onproposed future interior wall and ceiling locations as delineated in the plans. This

exemption shall not be used for S-1 or S-2 (storage), or for F-1 or F-2 (factory)

occupancies.


Lighting Controls for Skylit Areas



Control at least 50% of the general lighting in

lighting in the enclosed space and controlling

luminaires in primary sidelit areas separately

from skylit areas, both in addition to other

lighting control requirements.

When the total daylit area under skylights

exceeds 2,500 ft² the general lighting must be

controlled by an automatic multi-leveldaylighting control or a multi-level astronomical

.


3.2.6 Determining Fenestration U-factors



As a Certified Energy Plans Examiner you neednot know how to calculate U-factors but you do

z v - w y u

them.

CEC Default Values form Table 116-A

For buildings with less than 10,000 sf of fenestration area the Standards allow the use

-

from Reference Nonresidential Appendix NA6


3.2.7 Determining Relative Solar Heat Gain



Relative solar heat gain (RSHG) is essentially the same

as SHGC, except for the external shading correction

based on the overhangs.

An overhang factor may be used if the overhang

extends beyond both sides of the window jamb a

distance equal to the overhang projection (H)

143 a 5Cii .


3.2.8 Determining SHGC



There are four acceptable methods for determining SHGC :

-.

built fenestration.

2. For spaces with insulated roofs, use the NFRC or default rating of

the top dome only.

3. A third method is to use the SHGC Defaults from Standards Table

-

4. Skylights and site-built fenestration in buildings with less than

10,000 ft² of site-built fenestration, use Equation NA6-2 in the

Reference Nonresidential Appendix NA6.


3.2.9 Determining Visible Trans.



to the light that is incident on the outside of the glazing.

The value of VT for a given material is found in the

manufacturer’s literature.


3.2.10 Site Built Fenestration



It is not necessary to complete the NFRC testing and labeling prior

to completing the compliance documentation and filing the building

. ,

fenestration performance shown in the plans and specifications

and used in the compliance calculations is “reasonable” and.

If the values used for compliance are within 5 percent of the

Reference Nonresidential Appendix NA6 values, then the values

may be considered reasonable for plan check.

The glazing contractor or other appropriate party assumes

.


3.3 Opaque Envelope Insulation



3.3.1 Mandatory Measures Certification of Insulation Materials: See Reference Joint Appendix JA4; only U-factors may be

used to demonstrate com liance

Restricted use of Urea Formaldehyde Foam Insulation: must be installed on the exterior side of the

wall (not in the cavity of framed walls), and a continuous barrier must be placed in the wallconstruction to isolate the insulation from the interior of the space.

Flamespread Rating: Exposed installations of faced insulation must use fire retardant facings that

have been tested and certified not to exceed a flame spread of 25 and a smoke development rating

of 450.

Insulation over T-bar Ceilin s & Exce tions: Insulation installed on the to of sus ended T-bar ceilings with removable ceiling panels may not be used to comply with the efficiency standards.

Exception is the 2,000/12 foot rule

Demising Walls: must be insulated with a minimum of R-13 insulation. Exceptions: Demising walls

, ,

insulated

Insulation Requirements for Heated Slab Floors: See Table 118-A of the Standards. The top of the

insulation must be protected with a rigid plate to prevent intrusion of insects into the building

.

Wet Insulation Systems: CZ 1 & 16 are special in that you multiply the stated R-value by 0.8 before

using the look-up tables.


3.3.2 Prescriptive Insulation



The prescriptive requirements include minimum

insulation levels for roofs/ceilings, walls, and

floors. The requirements are expressed as amax mum - actor.

When an assembly of the proposed buildingdoes not precisely match one of the choices in

Reference Joint Appendix JA4, choose the best

ma c an an nsu a on eve a s e same or

less than the proposed assembly


Specific Envelope Assembly



Exterior Roofs and Ceilings (Table 3-9):





Exterior Walls (Table 3-10):

Light Mass walls (lightweight CMUand hollow cla masonr units aredefined as having a heat capacitygreater than or equal to 7.0 Btu/h-ft2 and less than 15.0 Btu/h-ft2.

Heavy mass walls (Solid UnitMasonry and Solid Concrete walls)are defined as having a heatcapacity greater than or equal to

15.0 Btu/h-ft2





Demising Walls:

epara ng con one space rom enc ose

unconditioned space, must be insulated with a minimumof R-13 insulation if the wall is a framed assembly. If it is

not a framed assembly, then no insulation is required.





Exterior Floors and Soffits (Table 3-11):





Exterior Doors (Table 3-12) new to 2008:

- ,

as a fenestration product and the entire door area is modeled as a

fenestration unit.


Table 143 –A Prescriptive Envelope Criteria (Put a copy in your Manual)




Seminar

32

Table 143 – B Prescriptive Envelope Criteria (Put a copy in your Manual)




Seminar

33


Additi d Alt ti



Additions and Alterations:

In general, additions and alterations to the building envelope must meet the prescriptive insulation

re uirements in 149 of the Standards or com l with the erformance com liance a roach. , .

Roofing Alterations §149(b)1B: For reroofin , when low-slo ed roofs are ex osed to the roof deck, the ex osed area must be

insulated to levels specified in Table 149-A.

Exceptions:

. -

2. If mechanical equipment is located on the roof and it will not be disconnected and lifted as part of theroof replacement, insulation added may be limited to the maximum insulation thickness that will allow aheight of 8 inches (20 cm) from the roof membrane surface to the top of the base flashing

3. If adding the required insulation will reduce the base flashing height to less than 8 inches (20 cm) atpenthouse or parapet walls, the insulation added may be limited to the maximum insulation thickness thatwill allow a height of 8 inches (20 cm) from the roof membrane surface to the top of the base flashing.

4. Tapered insulation may be used which has a thermal resistance less than that prescribed in Table 149-Aat the drains and other low points, provided that the insulation thickness is increased at high points, so thatthe average thermal resistance equals or exceeds the level specified in Table 149-A.


3.4 Roofing Products (Cool Roofs)



A roof with high solar reflectance and thermal emittance is referredto as a “cool roof”

Roofing Products and Cool Roofs Projects complying with theprescriptive approach must meet the requirements of §143(a)1 (cool

.

All cool roofs for which compliance credit is taken, regardless of

com liance a roach must meet the re uirements of 118 i . Thatsection says a roofing product’s thermal emittance and 3-year agedsolar reflectance shall be certified and labeled by the Cool Roof Rating Council (CRRC).

The Solar Reflectance Index (SRI) may be used as an alternative tothermal emittance and 3-year aged solar reflectance whencomplying with the requirements of Sections 141, 142, 143(a)1,

, , .,or


3.4.2 Roofing Products

Prescriptive Requirements



Prescriptive Requirements A low-sloped roof is defined as a surface with a pitch less than or

equal to 2:12 (9.5 degrees from the horizon), steeped slope is greater than 2:12.


3.4.2 Roofing Products (cont)

E ti



Exceptions :

1. Wood framed roof assemblies in climate zones 3 and 5 areexempt if the roof assembly has a U-factor of 0.039 or lower.

2. Metal framed roofs in climate zones 3 and 5 are also- . .

3. Roof area covered by building integrated photovoltaic panelsand buildin inte rated solar thermal anels is not re uired tomeet the cool roof requirements.

4. If the roof construction has a thermal mass over the roof .


3.5 Infiltration and Air Leakage

Joints and other openings in the building envelope that are potential



Joints and other openings in the building envelope that are potentialsources of air leakage shall be caulked, gasketed, weather-stripped,or otherwise sealed to limit infiltration and exfiltration.


3.6 Relocatable Public School Bldgs



Building envelopes must meet the prescriptive requirements in §143and lighting power requirements in §146.

Manufacturers must certify compliance and provide documentation

according to the chosen method of compliance.

orientations.

If the prescriptive method is used for all climate zones compliance,

-

For climate zone specific prescriptive compliance, the relocatableclassrooms must comply with the requirements of Table 143-A.


3.7.1 Overall Envelope TDV Energy Approach

The envelope tradeoff procedure has been revised with the 2008



The envelope tradeoff procedure has been revised with the 2008Standards. Previously, heat loss and heat gain rates were calculatedseparately and compared to the standard design values now thesprea s ee oo or o er approve programs a ows one o ra e obetween the two.

(TDV) energy associated with the building envelope, and in doing so,accounts for both overall heat loss and overall heat gain.

There is an Envelope Tradeo spreadsheet tool available on theCalifornia Energy Commission website which can perform thiscalculation.

The Nonresidential Manual provides those interested with a detailedexplanation of the calculations for both the Standard and Proposedbuildings.


3.7.4 Roof Alterations

The overall envelope approach may be used for roof alterations to



The overall envelope approach may be used for roof alterations, totrade off roof insulation with roofing products (cool roof) thermalperformance.

For low-sloped roofs the insulation level of the standard design is the

greater of the existing insulation or the minimum required in table 149- A unless the roof ualifies for one of the 3 exce tions.

1.Existing insulation of R-7 or better

. ,height.

3.If insulation will reduce flashing to less than 8” in height

For steep-sloped roofs, the U-factor criteria of Tables 143-A and 143-B of the Standards apply to the standard design building.



The energy software does an hourly simulation of the



The energy software does an hourly simulation of theproposed building, including a detailed accounting of

v ufenestration input, and including the precise geometry of

exterior overhangs or side fins.

Pro ram users and those checkin for enforcementshould consult the most current version of the user’smanuals and associated compliance supplements for s ecific instructions on the o eration of the ro ram.


3.8.7 Historic Buildings

Qualified historic buildings as defined in the California



Qualified historic buildings, as defined in the CaliforniaHistorical Building Code are not covered by the

.

However…

non-historical components of the buildings, such as newor replacement equipment, additions and alterations tohistoric buildin s and new a liances in historicbuildings may need to comply with Building EnergyEfficiency Standards and Appliance Standards

e a orn a s or ca u ng o e

Section102.1.1 specifies that all non-historical additionsmust comply with the Building Energy EfficiencyStandards.



The Standards offer prescriptive approaches and a performance



p p pp papproach to additions and alterations (but they do not apply torepairs).

An addition is a change to an existing building that increasesconditioned floor area and volume.

When an unconditioned area adds heating or cooling so that itbecomes conditioned, this area is treated as an addition.

An alteration is a change to an existing building that is not anaddition.

A repair is the reconstruction or renewal of any part of an existing

building for the purpose of its maintenance.

the repaired component, system, or equipment; otherwise, it isconsidered to be an alteration.


3.9 Additions and Alterations Compliance Options

For additions, the compliance options include:



, p p

The prescriptive envelope component approach;

The prescriptive overall envelope TDV energy approach;

The Addition alone performance approach.

The existing-plus-addition performance approach.

For alterations, the compliance options include:

The prescriptive envelope component approach;

The prescriptive overall envelope TDV energy approach;

The existing-plus-alteration performance approach.


3.9.1 Mandatory Measures for Additions and Alterations

§116 - Mandatory Requirements for



§116 Mandatory Requirements for

-

Other Openings;

§118 - Mandatory Requirements for Insulation

and Roofing Products (Cool Roofs).


3.9.3 Alterations, Fenestration

If less than 150 square feet of fenestration area is replaced throughout the entire buildingthen only the U-value requirements are met. The SHGC or Relative solar heat gain Coefficients



then only the U value requirements are met. The SHGC or Relative solar heat gain Coefficients

requirements need not be met.

The same requirements and exceptions apply if 50 square feet or less of fenestration area is

added .

For hotels/ motels or high rise residential buildings.

● Up to 150 square feet of added fenestration area is exempt from the 40 percent limitation

on west-facing orientation, U-factor, and the total area no greater than 40 percent of the

gross wall area limitation in §143(a)5,

-WWR of Table 143-B.

● Up to 50 square feet of skylight area is exempt from having no greater than five percent of

the gross exterior roof area limitation in §143(a)6A in the Standards.

● The added skylights shall meet the SHGC requirements in Table 143-B for the 2.1 to 5

percent area.


3.9.3 Alterations, Roofing Products When more than , t or more than 5 percent o a roo , whichever

is less, is being replaced on a conditioned building, energy code



g p g gy

requirements for roof surface radiative (cool roofs) properties and roof

.

Cool Roof Exemptions: .

2. Roof areas that have thermal mass over the roof membrane with

a weight of at least 25 lb/ft²

Insulation Exemptions:

1. HVAC equipment is not moved and insulation would be difficult

2. Roofs having “significant length” of penthouse walls or parapet

walls of different material than roof

Code requirements regarding roof insulation would not be "triggered" if

the existing roof surface were overlaid instead of replaced.


3.10 Compliance DocumentationField Inspection Checklist



Under the Prescriptive Approach:

● Documentation Author is responsible for filling out the Field

Inspection Energy Checklist. n er e er ormance pproac :

● The fields will be automatically filled.

A copy shall be made available to the Field Inspector during

different stage inspection.


3.10 Compliance DocumentationENV-1C Certificate of Compliance

The ENV 1C Certificate of Compliance form has 4



The ENV-1C Certificate of Compliance form has 4.

A copy of these forms should also be submitted tothe buildin de artment alon with the rest of thecompliance submittal at the time of building permitapplication.

The applicant may use alternative formats of theseforms provided the information is the same and insimilar format.


3.10 Compliance DocumentationEnvelope Mandatory Measures



The Documentation Author will indicate the location of the Mandatory

Measures on the building plans.

They should be incorporated into the organization of the plan set and

modified to be s ecific to the buildin desi n.


Questions?



Mechanical Systems

1

4.1 Overview

The objective of the Standards requirements for mechanical systems isto reduce energy consumption while maintaining occupant comfort.



1. Maximizing equipment efficiency, both at design conditions and

during part load operation

2. Minimizing distribution losses of heating and cooling energy

3. Optimizing system control to minimize unnecessary operation and

The Standards also reco nize the im ortance of indoor air ualit for

occupant comfort and health. To this end, the Standards incorporate

requirements for outdoor air ventilation that must be met during alloperating conditions.


4.1.2 Mandatory Measures

Mandatory measures (§110-119 and §120-129) apply

t ll t h th th d i h tha

t o r y



to all systems, whether the designer chooses the n d a

prescriptive or performance approach to compliance. M a

Eleven Mandatory Measures listed in Section 4.1.2


4.1.3 Prescriptive and PerformanceCompliance Approaches

After the mandatory measures are met, the Standardsa n c e



y r m

a ow mec an ca sys em comp ance o e

demonstrated through prescriptive or performance o r

P e r f o

requirements.

e s c r i p t i v

P r


4.1.3 Prescriptive and PerformanceCompliance Approaches

Prescriptive Requirements

1. Load calculations, sizing, system type and equipment selection p t i v e



g y yp q p[§144(a) and (b)]. c

r i

2. Fan power consumption [§144(c)].

3. Controls to reduce reheating, recooling and mixing of

P r e

. . .

5. Supply temperature reset [§144(f)].

6. Restrictions on electric-resistance heating [§144(g)].

7. Fan speed controls for heat rejection equipment [§144(h)].

8. Limitation on centrifugal fan cooling towers [§144(h)].

9. Limitation on air-cooled chillers [§144(i)].

10. Hydronic system design [§144(j)].

. .

12. Variable air volume control for single zone systems [§144(l)]


4.3 Ventilation Requirements

Within a building, all enclosed spaces that are normally used by humansmust be continuously ventilated during occupied hours with outdoor air

i ith t l h i l til ti (S ti 121( )1 a t o r y



using either natural or mechanical ventilation. (Section 121(a)1 n d

“Spaces normally used by humans” refers to spaces where people

can be reasonably expected to remain for an extended period of time.

M a

,

not have any unusual sources of air contaminants, do not need to be

directly ventilated. For example:

c ose oes no nee o e ven a e , prov e s nonormally occupied.

A storeroom that is only infrequently or briefly occupied does not

require ventilation. However, a storeroom that can be expected to

be occupied for extended periods for clean-up or inventory mustbe ventilated, preferably with systems controlled by a local switch

so a e ven a on sys em opera es on y w en e space s

occupied.


4.3.1 Natural Ventilation

Natural outdoor ventilation may be provided for spaces where allnormally occupied areas of the space are within a specific distanced

a t o r y



normally occupied areas of the space are within a specific distance n d

can flow. This distance is 20 ft. for most spaces and 25 ft. for

hotel/motel guestrooms and high-rise residential spaces. The sum

M a

area of each space that is naturally ventilated. The openings must

also be readily accessible to the occupants of the space at all

times.

Airflow through the openings must come directly from the

outdoors; air may not flow through any intermediate spaces such

u , u , ,

atriums. High windows or operable skylights need to have acontrol mechanism accessible from the floor.


4.3.2 Mechanical Ventilation

For each space requiring mechanical ventilation the ventilation rates

must the greater of either:d a t o r y



must the greater of either: n d

The conditioned floor area, multiplied by the ventilation rate from

Table 121-A (Standards)

M a

15 cfm person, multiplied by the expected number of occupants.




Floor area definitions for Ventilation

Floor Area, Gross:

The floor area within the inside perimeter of the exterior wallsn i t i o n s



The floor area within the inside perimeter of the exterior walls i n

of the building under consideration, exclusive of vent shafts

and courts, without deduction for corridors, stairways, closets,

the thickness of interior walls, columns or other features. The

D e

floor area of a building, or portion thereof, not provided with

surrounding exterior walls shall be the usable area under the

horizontal projection of the roof or floor above. The gross floor

.Floor Area, Net:

areas such as corridors, stairways, toilet rooms, mechanical

rooms and closets.


Partial Min. Ventilation Rate per Occ. Table 4-3




Ventilation Example 4-9




4.3.3 Direct Air Transfer

The Standards allow air to be directly transferred fromother spaces in order to meet a part of the ventilation d

a t o r y



other spaces in order to meet a part of the ventilation n

supply to a space, provided the total outdoor quantity

required by all spaces served by the building’s M a

systems.

Transfer air must be free from an unusual

contaminants, and as such should not be taken directly

from rooms where such sources of contaminants are

.

It is typically taken from the return plenum or directly.


4.3.4 Distribution to Zonal Units

When a return plenum is used to distribute outside air to a zonal heating or cooling unit, the outside air supply

n d a t o r y



o a o a ea g o coo g u , e ou s de a supp y n

must be connected either:

1. Within 5 ft. of the unit; or

M a

2. Within 15 ft. of the unit, with the air directed

substantially toward the unit, and with a discharge

. .


4.3.5 Ventilation System Operation

The Standards require that the minimum rate of outdoor air calculatedper §121(b)2 be provided to each space at all times when the

n d a t o r

y



n .

For spaces served by variable air volume (VAV) systems, this means

that the minimum su l settin of each VAV box should be no

M a

less than the design outdoor ventilation rate calculated for the

space, unless transfer air is used.

, ,air, must meet the minimum ventilation rate.

If transfer air is not used, the box must be controlled so that the

minimum required airflow is maintained at all times (unless

demand controlled ventilation is employed).


4.3.6 Pre-Occupancy Purge

Since many indoor air pollutants are out gassed from thebuilding materials and furnishings, the Standards require

n d a t o r

y



g g , q n

that buildings having a scheduled operation be purged

before occupancy. M a

mme a e y pr or o occupancy, ou oor ven a on mus

be provided in an amount equal to the lesser of:

.

2. Three complete air changes.


Figure 4-8

n d a t o r

y



n

M a


4.3.7 Demand Controlled Ventilation

Demand controlled ventilation (DCV) systems reduce the amount of ventilation supply air in response to a measured level of carbon

dioxide in the breathin zone.n d a t o r

y



n

The Standards requires the use of DCV systems for spaces with all

of the following characteristics:

M a

A. Served by single zone units with any controls or multiple zone

systems with Direct Digital Controls (DDC) to the zone level, and

. ave a es gn occupancy o person or sma er or areaswithout fixed seating where the design density for egress

purposes in the CBC is 40 ft2/person or smaller), and

C. Has an air economizer


4.3.7 DCV Exceptions

There are four exceptions to this requirement:

1. The following spaces are permitted to use DCV but are not required e p t i o n

s

t l ll t ffi d b lti l



to: classrooms, call centers, office spaces served by multiple zone

systems that are continuously occupied during normal business hours

with occupant density greater than 25 people per 1000 ft² per - -

E x

medical buildings, and public areas of social services buildings.

2. Where the space exhaust is greater than the required ventilation

rate minus 0.2 cfm/ft².

3. DCV devices are not allowed in the following spaces:

● Spaces that have processes or operations that generate dusts,

, , ,

exhaust ventilation.

4. Spaces with an area of less than 150 ft², or a design occupancy of

- - .


4.3.7 Demand Controlled Ventilation Example




4.4.1 Mandatory MeasuresDuct Insulation

Portions of supply-air and return-air ducts ductwork conveyingheated or cooled air located in one or more of the following spaces

n d a t o r

y

-a



-

1. Outdoors, or M a

. ,

3. In a space directly under a roof with fixed vents or openings

to the outside or unconditioned spaces, or

4. In an unconditioned crawlspace; or

5. In other unconditioned spaces.

Portions of supply-air ducts ductwork that are not in one of these

spaces shall be insulated to a minimum installed level of R-4.2 (or any higher level required by CMC Section 605) or be enclosed in

directly conditioned space.


4.4.2 Prescriptive RequirementsDuct Leakage

Ducts on small single zone systems with portions o the ductwork

either outdoors or in uninsulated or vented ceiling spaces arerequired to be sealed and leak tested as specified in Reference

c r i p t i v

e



.

Duct leakage testing only applies when all of the following are true:

1. The system is constant volume.

P r e

2. It serves less than 5000 ft2 of conditioned space.

3. 25% or more of the duct surface area is located in the outdoors, unconditioned

, , -

greater than the U-factor of the ceiling except where the roof meets with the

requirements of §143(a)1C.

agency to demonstrate a leakage rate of no more than 6 percent of fan flow.

Registration of forms is required with a HERS provider (CalCerts), is also required.

15% of fan flow, or more then 60% reduction from previous system. Repaired leaks

visually inspection from HERS rater.


4.5 HVAC Controls4.5.1 Mandatory Measures 1 and 2

1. Heat pump controls for the auxiliary heaters:

Heat pumps with electric resistance supplemental heaters must have controls that limit the

operation of the supplemental heater to defrost and as a second stage of heating when the n d a t o r

y

.a



2. Zone thermostatic control including special requirements for hotel/motel guest rooms and

perimeter systems:

M a

ona : ermostat c contro s must e prov e or eac space-con t on ng zone or we ng

unit to control the supply of heating and cooling energy within that zone

Hotel and motel guest rooms: thermostats to have numeric temperature setpoints in °F, and

setpoint stops that prevent the thermostat from being adjusted outside the normal comfort

range. These stops must be concealed so that they are accessible only to authorizedpersonnel.

Perimeter Systems: provided controls are incorporated to prevent the two systems from

conflicting with each other. If not:

● 1. The perimeter system must be designed solely to offset envelope heat losses or gains;

and

● 2. The perimeter system must have at least one thermostatic control for each building

.

● 3. The perimeter system is controlled by at least one thermostat located in one of the

zones served by the system

.CABEC 2008 Non Residential Plans Examiner Seminar


3. Shut-off and setback/setup controls: n d a t o r

y

a



For specific occupancies and conditions, each space-

conditioning system must be provided with controls that can

M a

.

4. Infiltration control:

dampers that automatically close when fans shut down (unless

system must operate 24 hours, or where prohibited). The

dam ers ma either be motorized or of the ravit t e.



5. Off-hours space isolation:

When the total area served by a system exceeds 25,000 ft², the

Standards require that the system be designed, installed and controlled n d a t o r

y

with area isolation devices The requirements are:a



with area isolation devices. The requirements are:

● 1. The building shall be divided into isolation areas, the area of each

not exceeding 25,000 ft².

M a

● 2. An isolation area cannot include spaces on different floors.

● 3. Each isolation area shall be provided with isolations devices such

as valves or dam ers that allow the su l of heatin or coolin to

be setback or shut off independently of other isolation areas.

● 4. Each isolation area shall be controlled with an automatic time

switch, occupancy sensor, or manual timer.

Any zones requiring continuous operation do not have to be

included in an Isolation area.

. on ro equ pmen cer ca on


4.5 HVAC Controls4.5.2 Prescriptive Measures

Space Conditioning Zone Controls to preventreheating, recooling and simultaneous heating and c

r i p t i v

e

coolinge



cooling.

VAV Zone Controls to have DDC (direct digital

P r e

controls), primary airflow not to exceed 20% at peak,

and airflow to be modulated.

Economizer must be fully integrated and must beprovided for each individual cooling space-conditioning

s stem that has a desi n su l ca acit over 2 500

cfm and a total cooling capacity over 75,000 Btu/h.

(exceptions do apply)

Supply Pressure controls for VAV systems for motors

equal or less than 10 hpCABEC 2008 Non Residential Plans Examiner Seminar

4.5 HVAC Controls4.5.2 Prescriptive Measures

Supply-Air temperature reset control to multiple zones mustautomatically reset in response to building loads or outdoor

c r i p t i v

e

.e



Heat Rejection fan control on cooling towers, closed-circuit fluid

coolers, air-cooled condensers and eva orative condensers are

P r e

required to have speed control (exceptions apply)

Hydronic System controls to include:

Design systems for variable flow §144(j)1; Chiller and boiler isolation §144(j)2 and 3; Chilled and hot water reset §144(j)4;

Isolation valves for water-loop heat pump systems §144(j)5;

VSDs for pumps serving variable flow systems

§144(j)6;Hydronic Heat Pump (WLHP) Controls §144(j)7.




CABEC 2008 Non Residential Plans

Examiner Seminar

Section 4.6 HVAC (prescriptive) SystemRequirements

The HVAC system requirements are all prescriptive c r i p t i v

e

e



requirements and may be modified in the whole P r e

building performance process. There are no mandatory



4.6.4 Sizing and Equipment Selection

The Standards require that mechanical heating and cooling equipment c r i p t i v

e

including electric heaters and boilers be the smallest size available,e



within the available options of the desired equipment line, that meets

the design heating and cooling loads of the building or spaces being P r

4.6.5 Load Calculations: to be ASHRAE based

. .

individual fan systems where the total power of the supply, return andexhaust fans within the fan system exceed 25 hp at design conditions

. .

1 hp or less are required to have either electrically commuted motors

(ECM) or shall have a minimum motor efficiency of 70 percent when ratedin accordance with NEMA Standard MG -1998 Rev. 2 at full load rating

conditions.



c r i p t i v

e4.6.8 Electric Resistance Heating

r e



P r



4.6.10 Centrifugal Fan Limitations:

Open cooling towers with a combined rated capacity of 900 gpm and c r i p t i v

e

greater at 95°F condenser water return, 85°F condenser water supplyr e



and 75°F outdoor wet-bulb temperature are prohibited to use

centrifugal fans. P r

4.6.11 Air Cooled Chillers:

New central cooling plants and cooling plant expansions that are

greater than or equal to 300 tons in installed capacity will be limited on

the use of air-cooled chillers.


Section 4.7 Service Water Heating

All of the requirements for servicehot water are mandatory measures,

exce t for hi h-rise residential n d a t o r y

hotels and motels that must complyM a



hotels and motels that must comply

with the Residential Standards

§151(f)8. These requirements are

M

escr e n e es en a

Compliance Manual.

There are no acceptance

requirements for water heatingsystems or equipment, however,

high-rise residential, hotels and

meet the distribution system

eligibility criteria for that portion of the system that is applicable.



The budget for space conditioning of the proposedbuilding design varies according to the following

r m a n c

e

specific characteristics:e

r f o



p

Orientation, space conditioning system type,

P e

occupancy ype, an c ma e zone

Compliance credits are given for systems that

.

See the ACM for assumptions used by the computer

ro ram

For the 2008 Standards a new compliance credit isrovided for acka ed e ui ment that em lo fault

detection and diagnostics (FDD) systems.


FDD for Rooftop Air Conditioners

Key Concepts Sensors monitor conditions at various points in cooling cycle.

r m a n c

e

Calculates the difference between monitored and expectede

r f o



ptemperatures.

Analyzes the data to determine what problems may be imminent

P e

Eligibility Criteria

Packaged Systems only since in split systems the controls are notintegrated

Economizer (to qualify for economizer credit)

Controls allow for self detection and diagnostic of faults


FDD continued

Eligibility Criteria for Air handling Units and VAV boxes r m a n c

e

e r f o



Built-up Systems P e

Economizer (to qualify for economizer credit)

VAV Boxes (to qualify for VAV credit)

.



4.9.2 Mandatory Measures – Additions andAlteration

n d a t o r y

New mechanical equipment or systems in additions M a



New mechanical equipment or systems in additions

and/or alterations must comply with the mandatorymeasures.

List of mandatory measures and when they apply –

know where to find the list (page 4-94 in manual) for when you need it as consultant or plan checker. Its too

bi to memorize.


4.9.3 Requirements for Additions

Prescriptive Approach:

– r m a n c

e

Conditioning Systemse r f o



Conditioning Systems

145 – Prescri tive Re uirements for Service n d P e

Water-Heating Systems

Performance Approach: c r i p t i v e

Addition may be shown to comply on its own, or

An existin lus addition lus alteration ma be used

P r e


4.9.4 Prescriptive Requirements for Alterations

ew or ep acemen qu pmen

New space conditioning systems or components other than space

conditioning ducts must meet applicable prescriptive requirements of §144 c r i p t i v

e

o t e tan ar s.

P r e



Minor equipment maintenance does not trigger prescriptive requirements,

though equipment replacement will.

P

Air Distribution Ducts

When new or replacement space-conditioning ducts are installed to serve

,

(insulation levels, sealing materials and methods etc.).

Equipment Alterations

When a space conditioning system is altered by the installation or

replacement of space conditioning equipment (including replacement of theair handler, outdoor condensing unit of a split system air conditioner or heat

pump, cooling or heating coil, or the furnace heat exchanger), the duct

system attached shall be sealed, as confirmed by a HERS rater (some

exceptions may apply)CABEC 2008 Non Residential Plans Examiner Seminar

4.10 Glossary / Reference

These are further defined in the Reference Joint Appendix JA1 (another good reason to read this

document at least once)



I feel knowing and being able to reference thedefinitions is one of the basic skills required when

working with Title 24 energy standards…I strongly

recommend ever one to take the time to review and be

able to find ALL definitions either in printed or electronicformat.


Questions?




Indoor Lighting



Indoor Lighting

1CABEC 2008 Non Residential Title 24 Energy Code Primer

5.1 Overview

The primary mechanism for regulating indoor lighting

energy un er e an ar s s o m e a owe



lighting power in watts installed in the building.

Other mechanisms require basic equipment efficiency,

and require that the lighting is controlled to permit

efficient operation.

CABEC 2008 Non Residential Title 24 Energy Code Primer 2

5.1 Mandatory Measures

Mandatory measures include manual switching, daylit n d a t o

r y

area con ro s, an au oma c s u -o con ro s. M a



New in the 2008 Standards are requirements for

dimmers, track lighting integral current limiters, high

efficacy LED light sources, ballast for residential

recessed luminaires, and dimmable fluorescent ballasts

when those ballast are used to obtain a power

.


5.1.2 Lighting Power

Allowed lighting for a

building is determined by r m a n c e

one of the followingP

e r f o



methods: o

r P

• Prescriptive - Complete

Building Method e s c r i p t i v

• Prescriptive - Area

Category Method

P r

• Prescriptive - Tailored

Method

• Performance Approach


5.2 Lighting Design Procedures5.2.1 Mandatory Measures

There are four main types of mandatory measures: n d a t o

r y

.

appliance efficiency regulations M a



pp y g

.

requirements of Title 24 Section 119 and are listed in

the Directory of Automatic Lighting Control Devices

3. High efficacy lighting and lighting control

requirements in dwelling units

4. Mandatory control requirements for certain

applications


5.2 Lighting Design Procedures

5.2.1.1 California Appliance Standards

At the time the 2008 Standards were adopted, key lighting equipment

that have separate California Appliance Efficiency Regulationsinclude:

n d a t o

r y

1. Metal halide luminaires (≤ 500W must be pulse start, electronic

ballasts of ballast efficiency ≥ 88 percent)

M a



ballasts of ballast efficiency ≥ 88 percent)

.

face)

3. Torchieres (requirement of no more than 190 W).

4. Lighting of cabinets and wine chillers (lighting efficacycomparable to T-8 fluorescent lamps with electronic ballasts)

. g ng o everage ven ng mac nes au oma c con ro s or

placing cooling and lighting in low power mode)

The Title 20 regulations can be downloaded from:

http://www.energy.ca.gov/appliances/


5.2.1.2 Lighting Equipment Certification

Lighting control devices have minimum requirements or:

Automatic time switch controls (Energy Management Control

S stem EMCS

Occupant-sensor devices



●Occupant sensors, motions sensors and vacancy sensors

m nu es

● Multi-level occupancy sensors (30-70% on at first, separate

switch for rest)

Automatic daylighting controls (reduce wattage by 2/3’s)

Indoor photosensors

Dimmers (minimum level to be 65%)

Track lighting integral current limiters (15 watt per linear foot)

High efficacy and LED light sources

Dimmable fluorescent ballasts for power adjustment factor CABEC 2008 Non Residential Title 24 Energy Code Primer 7

5.2.1.3 Mandatory Lighting Controls,

read manual for further information (goes into great detail):

1. Light switches (or other control) in each room [§131(a)]

n d a t o

r y

. u - eve con ro or g ng sys ems > . s , more an one g , morethan 100 sf, not a corridor.

3 D li h i l [§131( )]

M a



3. Daylighting controls [§131(c)]

a. Separate switches when skylit or primary sidelit zone > 250 ft2.

b. Automatic multi-level daylighting controls when skylit or primary sidelit zone > 2,500ft2.

c. Controls calibrated so that space always meets or exceeds design footcandles andelectric lighting is fully dimmed when daylight is 150% of design illuminance.

4. Automatic shut-off controls – a time sweep with an override switch or occupancy sensor .

5. Display lighting is separately switched. [§131(e)] 6. When the tailored lighting method is

used to show compliance, general lighting must be on a separate shut-off control fromdisplay lighting [§131(f)]

7. Stores larger than 50,000 sf must have automatic controls to shed 15% of lighting loadwhen an automated demand response signal is received from the local utility.


5.2.1.5 Mandatory Daylighting Controls. ay areas are spec e on e u ng p ans c

2. When the total primary sidelit and skylit daylight areas in a room arereater than 250 ft2, the eneral li htin in these da lit areas are n

d a t o

r y

separately circuited and controlled.

3 Wh th t t l i id lit d k lit d li ht i

M a



3. When the total primary sidelit and skylit daylight areas in a room are, ,

general lighting in these daylit areas.

4. Automatic daylighting controls are multi-level (including dimming) andassure a um nance n e con ro e area oes no a e ow edesign illuminance and that the controlled lighting is at minimumpower when the illuminance from daylight is 150% of designilluminance

A key exception the automatic daylight controls requirements is that

these controls are not required if there is not enough daylight.

not transmitting enough (low effective aperture) or that sunlight issignificantly blocked by nearby buildings.


5.2 Lighting Power Allowances

5.2.2.1 Allowed Lighting Power c r i p t i v e

building’s allowed lighting power with its actual lighting power (as

adjusted for controls) The actual power shall be less than the P r e



adjusted for controls). The actual power shall be less than the

.

There are three methods to determine the allowed lighting power

using the prescriptive approach:

● the complete building,● the area category, and

● e a ore me o .

The lighting allotment must be based on area intended only for


5.2.1.3 Mandatory Lighting Controls




5.2.2.2 Indoor Lighting Power Trade-offs

Lighting Power can be traded off in accordance with

.



There are NO trade-off between Indoor and Outdoor Areas

-

Unconditioned Indoor spaces.


5.3 Prescriptive Approaches5.3.1 Complete Building Method

The Complete Building Method can only be appliedwhen all areas in the entire building are complete (i.e., c

r i p t i

v e

lighting will be installed throughout the entire building

under the permit for which the Standards compliance is P r e



p p

for a minimum of 90 percent of the floor area of the

entire building.

Retail and wholesale store buildings shall use thismethod only if the merchandise sales function area is

.


5.3 Prescriptive Approaches5.3.1 Complete Building Method

c r i p t i

v e

P r e




5.3 Prescriptive Approaches5.3.2 Area Category Method

The area category method is more flexible than c r i p t i

v e

be used for multiple tenants or partially P r e



completed buildings. For purposes of the area category method, an

"area" is defined as all conti uous s aces that

accommodate or are associated with a singleprimary function as listed in Table 5-3 (Table

146-F in the Standards).

Areas not covered b the current ermit are

ignored.


5.3 Prescriptive Approaches5.3.2 Area Category Method

c r i p t i v e

P r e




5.3 Prescriptive Approaches5.3.3 Tailored Method

Lighting power on a room-by-room basis. The Standards allow theTailored Method for most buildings and spaces.

c r i p t i v e

Use of Tailored Method is acceptable when the building or

space has function types, which are allowable display and/or P r e



ornamental lighting. It may also be helpful when a building and/or areas have

spaces with higher room cavity ratios (RCR’s) such as those

with an RCR of 3.5 or hi her.

Tailored Method has several components (wall display, floor

display, ornamental and very valuable display lighting) that are

“ ”u w .

As a result, if a lighting design does not include these components,the allowed watta e under the Tailored Method ma be less than if

the Area Category Method or Whole Building Method of

compliance is used.



The room cavity ratio must be determined for a spaceusing the Tailored Lighting Method. c

r i p t i v e

RCR = 5 X H X (L+W) / A P r e



=

H = The room cavity height, vertical distance

measured from the work plane to the center line of

the lighting fixtureL = The room length using interior dimensions

W = The room width using interior dimensions

A = The room area



. eterm ne um nance

Category

c r i p t i v e

.used in Area Categorymethod, cannot be used for tailored

P r e



3. Determine RCR for each“tailored” area

.

Lighting Power

5. Determine additional. .

display)Dining room of 100 sf with RCR of .5 = 50 watts

One 10 ft wall is for art display = 15 watts allowed for display only

’


=

Calculated watts allowed = 95 watts total

Area category would allow 1.1 watts per sf = 140 (110 + 30 watts)


The performance approach provides an alternative r m a n

c e

me o o e prescr p ve approac or es a s ng e

allowed lighting power for the building. P e r f o



Under the performance approach, the energy use of

approved by the Energy Commission.


5.5.1 Exempt Lighting – Partial List

The following lighting applications are exempt from the actuallighting power used to compare with the allowed lighting power for c r i p t i v e

.

However, some of the applications listed below are regulated by P r e



other sections of the Standards. For exam le, li htin inhotel/motel guest rooms is exempt from §146(c), but it is regulated

in §150(k) in accordance with §130(b).

C. Theatrical lighting controlled separately

.

F. Exam lighting in medical buildings


5.5.2 Actual Lighting Power Calculation

Wattages of all planned permanent, and portable (including planned

portable), including hard wired and plug-in lighting systems shown on theplans at the time of permitting, must be considered (except those exempt).

c r i p t i v e

This includes track lighting systems, chandeliers, portable free standing

lights, lights attached to workstation panels, movable displays and P r e



cabinets, and internally illuminated case work for task or display purposes.e n v ua s gn ng t e g t ng p ans must c ear y n cate on t e p ans

the actual power for the portable lighting systems in the area.

1. Determine the watts for each type of fixture. This includes both the lamp

and the ballast wattage.

2. Determine the number of each fixture type in the design.

3. Multiply the fixture wattages by the numbers of fixtures and sum to obtain

the building total actual lighting power in watts (this includes wattages

of portable lighting systems).

4. Adjust for Power Adjustment Factors (PAF), if applicable.


5.5.2 Actual Lighting Power CalculationPortable Lighting Systems

For all spaces, the actual wattage of all planned permanent andportable lighting must be included in determining the actual lighting c r i p t i v e

.

clearly indicate the actual power for the planned permanent and

portable lighting systems in the area (on the plans). P r e



However, for offices of any size, the first 0.2 watts per square feet

of portable lighting is not used for determining the actual installed

lighting power density.

For example, if 0.3 watts per square feet of portable lighting isplanned in an office, then only 0.1 watts per square feet (0.3

minus 0.2 = 0.1) will be added to the actual installed lighting

power density.


5.5.3 Determining Luminaire Wattage

The Standards determine the luminaire wattage to becounted towards calculating installed indoor lighting c

r i p t i v e

power based on lamps, ballasts, and luminaire type.

Depending on the lighting technology used in the P r e



luminaire wattage in §130(d).

The various methods are listed in 5.5.3


5.5.4 Reduction of Wattage Through Controls

The controlled watts of connected lighting within the building may

be adjusted to take credit for the benefits of certain types of automatic lighting controls. A list of the controls that qualify for these c

r i p t i v e

credits is shown in Table 146-C in the Standards.

Only a portion of the table is shown, the full table is in the Non P r e




5.6 Additions and Alterations5.6.1 Mandatory Measures

space must comply with mandatory requirements of §119, §130, §131,and §134.

All “altered” lighting components in alterations must comply with applicable mandatoryrequirements n

d a t o r y

1. Spaces with lighting systems installed for the first time shall meet the applicablerequirements of §119, §130, §131, and §134.

2 When the requirements of §131(c)2B are triggered by the addition of skylights to

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2. When the requirements of §131(c)2B are triggered by the addition of skylights to- ,control need not meet the multi-level requirements in §131(c)2Diii.

The following wiring alterations shall meet the applicable requirements of §119,§130,§131, and §134:

1. Where new or moved wiring is being installed to serve added or moved luminaires.2. Where conductor wiring from the panel or from a light switch to the luminaires is

being replaced.

3. Where a lighting panel is installed or moved to a new location.

4. Where an existing enclosed space is subdivided into two or more spaces, the new

enclosed spaces shall meet the applicable requirements of §119, §130, §131, and.

5. Alterations to an existing space, where the existing lighting system is less than 0.5W/ft², and the lighting is increased to more than 0.5 W/ft².




5.6.4 Prescriptive Alterations

Alterations to existing indoor lighting systems shall meet the

following requirements: c r i p t i v e

1. Spaces with lighting systems installed for the first time shall

meet the applicable requirements of §149(b)1, §143(c), and

§146

P r e



§146.2. Alterations that increase the connected lighting load, replace,

or remove and re-install a total of 50% or more of the

luminaires in an enclosed s ace, shall meet the re uirements

of Section 149(b)1 and 1463. Alterations to an existing space, where the existing lighting

. ,

more than 0.5W/ft2 shall meet the applicable requirements of

§149(b)1, §143(c), and §146


Questions?



CABEC 2008 Non Residential Title 24 Energy Code Primer

Outdoor Lighting



1

6.1.2 Scope and Application

Energy trade-offs between outdoor lighting and any of the following are not permitted:

Indoor Lighting

Si n Li htin



Si n Li htin HVAC

Water Heating

2CABEC 2008 Non Residential Plans Examiner Seminar



3CABEC 2008 Non Residential Plans

Examiner Seminar

Outdoor Lighting Applications NotRequired

When a luminaire is installed only to illuminate specificapplications listed, the lighting power is exempt from

Section 147(b)

Partial List

A T td li hti



A. Temporary outdoor lighting

C. Lighting for public street, road, etc.

G. Lighting of public monuments

J. Lighting of tunnels, bridges, stairs, etc.

See 6.1.2 B. For complete list



The mandatory features and devices must be includedin all outdoor lighting project when they are applicable.

n d a t o r y

M a




6.2.1 Certification

Certain lighting control products must be certified bytheir manufacturer to the CEC. n d a t o r y

M a

,



,astronomical time switches, and automatic controls.

Details and requirements are listed in 6.2.1


6.2.2 Minimum Lamp Efficacy utdoor luminaries with lamps over watts must either:

have a lamp efficacy of 60 lumens per watt or n d a t o r y

This requirement will mostly impact fixtures that are designed for mercury

va or lam s and lar er watta e incandescent lam s. Most linear

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fluorescent metal halide and high pressure sodium lamps have a lamp



fluorescent, metal halide, and high-pressure sodium lamps have a lamp

efficacy greater than 60 lumens per watt and will easily comply.

evera g ng app ca ons are excep rom e m n mum amp e cacy

requirement.

Partial List (complete list in 6.2.2)

● Lighting required by health or life safety statute

● Searchlights● Lighting for film or live performances


6.2.3 Cut-Off Luminaires

Outdoor luminaires with lamps greater than 175 wattsmust be CUT-OFF when used in specific areas (see n d a t

o r y

exemptions).

Required areas:

M a

●Hardscape



●Hardscape

● Building entrances

● All sales and non-sales canopies

●Outdoor dining

● All outdoor sales area.

When Cut-Off Luminaires are required, either Cut-Off or Full Cut-Off are allowed.


6.2.3 Cut-Off Luminaires

Cut-Off Luminaire

Not more than 2.5% n d a t

o r y

rated lumens above

900 M a

rated lumens above



rated lumens above

800

Full Cut-Off Luminaire

No light above 900

rated lumens above

800


6.2.4 Automatic Shutoff Controls

Permanently installed outdoor lighting must becontrolled by a photo control or astronomical time n d a t

o r y

switch to automatically turn off the outdoor lighting

when daylight is available. M a

ec on . . spec es requ remen s or con ro s an



p qswitches.

.


6.2.5Multi-Level Switching

Outdoor areas with two or more luminaires are requiredto use Multi-level switching. n d a t

o r y

Multi-level switching allows the lighting to be reduced

by at least 50% but not more than 80% when the

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lighting is not needed



ylighting is not needed.

Continuous dimming controls are acceptable if their

range encompasses 50% to 80% power reduction. Exceptions and options are described in more detail in

6.2.5


6.3 Lighting Zones & Outdoor Lighting Ordinances

The outdoor lighting power is partially based on how

bright the surrounding conditions are. The brightness of n d a t

o r y

lighting zones. M a




6.3.2 Outdoor Lighting Zones

The CEC defines the boundaries of Lighting Zones basedon U.S. Census Bureau boundaries for urban and rural n d a t

o r y

areas as well as wilderness and park area boundaries. M a

,



http://factfinder.census.gov/servlet/AdvancedGeoSearchMa= = _ _

The US Census Website provides a handy way todetermine if a property is in rural (Lighting Zone 2)or urban (Lighting Zone 3) census tract.

A link to the U.S. Census Bureau can be found on thea orn a nergy omm ss on we s e:

http://www.energy.ca.gov.


6.3.3 Lighting Zone Adjustments

The Energy Commission maintains a web-based list of local adjustments to the default Lighting Zones. n d a t o r y

Jurisdictions are required to notify the Energy

Commission of the change in designation, with detailed M a



A. Option for Parks, Recreation Areas and Wildlife

Preserves is Lighting Zone 1.

B. Option for Rural areas is Zone 2

C. O tion for Urban areas is Zone 3


6.4 Outdoor Lighting Power

An outdoor lighting installation complies with theStandards if the actual outdoor lighting power is no c r i p t i v e

greater than the allowed outdoor lighting power.

6.4.1 Maximum Outdoor Lighting Power is the P r e

com ne o a o a o e a owe g ng power l



layers.

. .

for allowed lighting power and is only consideredilluminated only if it is located within 5 mounting

e g s o e neares um na re a are no

obstructed, and not including landscaping areas

reater than 10 ft in width.


6.5 Hardscape Lighting Power Allowance

The allowed lighting power for general hardscape lighting is calculated

as the sum of three distinct items: c r i p t i v e

.

Table 6-3

B. Linear Wattage Allowance: Total hardscape perimeter length x

P r e

-



C. Initial Wattage Allowance: One time number used based on

lighting zone from Table 6-3

Hardscape in Urban area 100 ft x 100 ft (assume completely

illuminated.)

(1000 x .092) + (400 X 0.92) + 770 = 1230 watts allowed


6.6 Additional Lighting Power Allowancefor Specific Applications

The lighting power or peci ic Applications provides additional

lighting power that can be layered in addition to the General

Hardscape lighting power allowances as applicable. c r i p t i v e

6.6.1 Specific Allowances Power trade-offs not allowed.

6.6.2 Wattage Allowances per application such as building

-

P r e

.

6 6 3 W tt ll i li f t i i f td l



6.6.3 Wattage allowance in linear feet is given for outdoor sales

frontage (per Table 6-4)

6.6.4 Wattage allowance is given for ornamental lighting in

hardscape(per Table 6-4)

. .

● Partial List (complete list in 6.6.5)

• Building facades

• Outdoor Sales Lots


Partial Table 6-4




6.7 Lighting Power Allowances forOrdinance Requirements

Additional lighting power allowances are available

when higher light levels are required by law, through an c r i p t i v e

officially adopted local ordinance by the authority

having jurisdiction in accordance with §10-114. See P r e

requirements for applying local lighting ordinances.



q pp y g g g

*as of October 20, 2010 City of Chula Vista the only

one to petition for ordinance

The additional lighting power allowances for lighting

ordinance requirements provides additional lighting

power that can be layered in addition to the General

allowances as applicable.


6.8 Alterations and Additions for OutdoorLighting

The Standards apply to alterations and additions to

outdoor lighting systems. In general, additions are the c r i p t i v e

same as new construction such as the mandatory

measures and compliance with lighting power density a n d P r e

Th li ti f th St d d t lt ti d dt o

r y



The application of the Standards to alterations depends

on the sco e of the ro osed im rovements. In a n d a t

general, alterations to existing outdoor lighting systemsthat for any lighting application that is regulated by the

M

,

replace more than 50 percent of the luminaires shall

meet the requirements.


Questions?




Sign Lighting



1


The 2008 sign lighting Standards address both indoor

and outdoor signs. The Standards include control

requirements for all illuminated signs (§133), as well as



illuminated and externally illuminated signs(§148).


7.1.2 Scope and Application (cont)

No Tradeoffs

The Standards do not allow tradeoffs between sign

lighting power allowances and indoor lighting or



lighting power allowances and indoor lighting or

outdoor lighting, HVAC, building envelope, or water

h in


7.1.3 Summary of RequirementsMandatory Measures

Automatic shutoff controls, n d a t o r y

Dimming controls, and M a

Demand responsive controls for electronic message centers



are independent of outdoor Lighting Zones.


7.1.3 Summary of Requirements. Sign Lighting Power

Sign lighting Standards apply to both indoor and outdoor signs and

contain both prescriptive and performance approaches. r m a

n c e

The performance approach specifies a maximum lighting powerthat can be installed.

n d P e r f o

The prescriptive requirements specify that the signs shall beilluminated with efficient lighting.

p t i v e



g g

c r i p

P

r e



The mandatory features and devices must be included n d a t o r y

in all sign lighting projects when they are applicable. M a




7.2.1 Certification of Lighting Controls

Manufacturers of lighting control products certify the n d a

t o r y

per ormance o t e r pro ucts to t e a orn a nergy

Commission.

M a

It is the responsibility of the designer, to specify



p y g , p y

.

Code enforcement officials, check that the lighting

controls specified are indeed certified.


7.2.3 Automatic Lighting Controls

All outdoor signs shall be controlled with a photocontrol n d a

t o r y

or out oor astronom ca t me sw tc contro .

Controls used to meet these re uirements shall be

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certified by the manufacturer and listed in the Energy



y gy

.

Exceptions for areas requiring illumination during

daylight hours


7.2.4 Dimming Controls

All outdoor signs with permanently connected lighting must be

controlled with a dimmer that provides the ability to automatically n d a

t o r y

hours.

The dimmin control re uirements do not a l to:

M a

Signs that are illuminated for less than one hour per day duringd li h h



daylight hours.

Outdoor signs in tunnels and large covered areas that requireillumination during daylight hours.

Metal halide, high pressure sodium, cold cathode, and neonlamps used to illuminate signs or parts of signs.

manufacturer and listed in the Energy Commission directory.




7.3 Sign Lighting Energy Requirements

Standards apply to internally and externally illuminatedsigns…indoors and outdoors

7.3.1 Watts per square foot approach

7.3.2 S ecific Technolo A roach – com liancebased on lamp type with very specific requirements




7.3.3 Additions and Alterations

All new signs regardless of whether they are installed in

conjunction with an indoor or outdoor addition or

alteration to a building or outdoor lighting system must




7.3.4 Sign Alterations

Existing indoor and outdoor internally illuminated and externally

illuminated signs that are altered are required to meet the.

Altered components of existing indoor and outdoor internally andexternall illuminated si ns must also meet the re uirements of§130(d)2, if Performance Approach is used for compliance.

The lighting power requirements (either prescriptive or



The lighting power requirements (either prescriptive or

externally illuminated signs when any of the following occurs:

The connected lighting power is increased.

More than 50% of the ballasts are replaced and rewired.

The sign is relocated to a different location on the same site or.


7.3.4 Sign Alterations

The lighting power requirements are not triggered whenust t e amps are rep ace , t e s gn ace s rep ace or

the ballasts are replaced (without rewiring).

These signs must comply with either alternative (a) or



.

triggers the alterations requirements generally involves

rewiring from parallel to series or visa versa, or when a

ballast(s) is relocated within the same sign requiringrelocating the wires.


Questions?




Refrigerated Warehouses



1

8.1 Introduction

This section of the nonresidential compliance manuala resses re r gerate ware ouses. nce regu at on o

refrigerated warehouses is new for the 2008 Standards

(§126), a separate section covering the majority of the

refrigerated warehouse requirements has been



refrigerated warehouse requirements has been

provided.

8.1.2 Mandatory Measures and Compliance Options:

There are no rescri tive or erformance o tions, all

provisions are mandatory.



§126 of the 2008 Standards addresses the energy efficiency of

refrigerated spaces within buildings, including both coolers and.

between 32 degree F (0 oC) and 55 degree F (13 oC). Freezers aredefined as refrigerated spaces cooled below 32 oF (0 oC).

The 2008 Title 24 Building Energy Efficiency Standards do notaddress walk-in refrigerators and freezers, as these are coveredby the Title 20 Appliance Efficiency Regulations A walk-in



by the Title 20 Appliance Efficiency Regulations. A walk-inrefrigerator or freezer is defined as a refrigerated space less than

3000 ft2 in floor area.

,chilling space or process equipment.


8.2.1 Opaque Envelope Insulation

The minimum R-values of insulation applied to the enclosing

surfaces of cold storage and frozen storage spaces are shown in n d a

t o r y

- .

The R-values shown in Table 8-1 apply to all surfaces enclosing arefri erated s ace, includin refri erated s aces ad oinin

M a

conditioned spaces, other refrigerated spaces, unconditionedbuffer spaces and the outdoors. The R-values are the nominalinsulation R-values and do not include the R-value of other



insulation R values and do not include the R value of otherbuilding materials or internal or external “film” resistances. The R-

values shown in Table 8-1 are independent of the thermal mass ofthe enclosing surface.


8.2.2 Underfloor Heating

Underfloor heating systems should be used under n d a

t o r y

rozen storage ware ouses to prevent so reez ng an

expansion.

M a

Underfloor heating can be electric resistance, forced



, ,

systems utilizing electric resistance heating elements

u y y

controlled and disabled during the summer on peak

period.


8.3 Mechanical Systems

8.3.1 Overview




8.3.2 Evaporators §126(c)

Fan powered evaporators used in coolers and freezers have limits

n d a

t o r y

fan speed control. Single phase fan motors less than 1 hp

o erated at less than 460 volts must be electronicall commutated.

M a

This requirement is designed to reduce fan power in small

evaporator fans, and is consistent with the requirements of the



evaporator fans, and is consistent with the requirements of the

Title 20 Appliance Efficiency Regulations.

Documentation must be submitted to the code enforcement

authority that documents the use of electronically commutated

motors in the fan powered evaporators containing single phase fan

motors smaller than 1 hp.


8.3.3 Condensers

All refrigeration systems using ammonia as the refrigerant must be

evaporatively cooled. This requirement may be met by an n d a

t o r y

-connected to a closed loop fluid cooler or cooling tower. Air cooledcondensers and groundwater condensers are not permitted in

M a

. To provide stable operation in compliance with the condensing

temperature controls described above compressors and all



p passociated components (oil cooling systems, oil separators.) must

be designed to operate at a minimum condensing temperature of70°F (21 oC) or less.


Additional Design Details

The NonResidential Manual includes substantial

additional guidance for refrigerated warehouses. For

individuals working on the design, energy compliance



the Manual will be essential. This overview is not

intended to fully review all aspects of the Refrigerated

Warehouse requirements.



An addition is a change to an existing refrigerated warehouse that

increases refrigerated floor area and volume. See §149(a)1. n d a

t o r y

2. When an unconditioned or conditioned building; orunconditioned or conditioned part of a building adds refrigeratione ui ment so that it becomes refri erated, this area is treated as

M a

an addition.

3. An alteration is a change to an existing building that is not an



.

evaporators, a new lighting system, or a change to the buildingenvelope, such as adding insulation. See §149(b)1.

4. A repair is the reconstruction or renewal of any part of anexisting building or equipment for the purpose of its maintenance.


Questions?




Performance Method



1

Professional Judgment

Certain modeling techniques and compliance

or restricted. That is, there is little or no freedom to

choose in ut values re ardin s ecific in ut variables

for compliance modeling purposes.



,

modeling for which professional judgment is necessary.,

evaluating whether a given assumption is appropriate.

n w r m n r v r r ri iv requirements .


Professional Judgment u ng epartments ave u scret on to quest on t e appropr ateness o a

particular input, especially if the user has not substantiated the value with

supporting documentation.

Two questions may be asked in order to resolve whether good judgment has

been applied in any particular case:

consistent with the approach or assumption used in generating the energy

budget?

●



●

and/or technique used by the program in calculating the energy budget

unless drawings and specifications indicate specific differences thatwarrant conservation credits or penalties.

Is a simplifying assumption appropriate for a specific case?

● If sim lification reduces the ener use of the ro osed buildin whencompared to a more explicit and detailed modeling assumption, the

simplification is not acceptable


9.3 Application Scenarios

The performance approach may be used for whole

that only involve the building envelope or, the

mec an ca sys em, or a nvo ve any com na on othe building envelope, the mechanical system, and the

g ng sys em oge er g ng canno e one a one



g ng sys em oge er. g ng canno e one a one

in the performance approach.


9.3.1 Whole Building Compliance

Whole buildings are projects involving buildings where

,

and specifications for all the features of the building

enve ope, mec an ca , g ng an serv ce wa er heating).



When a whole building is modeled using the

erformance a roach, trade-offs can be made

between the envelope, space conditioning, service

water heatin and li htin s stems that are included in

the permit application.


9.3.2 Compliance by Permit Stage

Modeling Future Construction by Permit Stage

When a feature of a building is not included in the permit

application, it is required to default to a feature automatically

determined in the computer program. The defaults vary for

envelope, mechanical, and lighting. The ACM Manual and the

program vendor’s compliance supplement contain additionalinformation on the default values.



When a feature of a building is not included in the permitapplication, and it is an existing building feature, it is required

u u u y u

program. The defaults vary for envelope, mechanical, and

lighting.


9.3.3 Additions Performance Compliance

An addition is treated similar to a new building in the performance

.

created with an addition, all systems serving the addition will

requ re comp ance o e emons ra e . s means a e er e

prescriptive or performance approach can be used for each stage

of the construction of the addition



of the construction of the addition.

Note: When existing space conditioning or water heating is

extended from the existing building to serve the addition, those

s stems do not need to com l .


9.3.3 Additions Performance ComplianceExisting Plus Addition

Additions may also show compliance by either:

Demonstrating that efficiency improvements to the envelope,

mechanical improvements, offset substandard addition

Performance (see §149(a)2Bii), or

the§149(b).

This a roach also allows the a licant to im rove the ener

ffi i f th i ti b ildi th t th ti b ildi t th



efficiency of the existing building so that the entire building meets the

energy budget that would apply, if the existing building wasunchanged, and the addition complied on its own. Changes to

features in the existing building are considered alterations.


9.3.4 Alterations Performance Compliance

Alterations of the Permitted Space

Altered spaces can show compliance with the

performance approach independent of the remainder

of the existing building



planned alterations plus other improvements to the

Existing Plus Addition Plus Alterations includes the

addition plus any alterations to the existing building


9.4 Enforcement and Compliance

Compliance software output is required to specify the

run initiation time, a unique runcode, and the totalnumber of pages of forms printed for each proposed

building run on each page whenever a building

has been selected.

The com liance software re uirements will

t ti ll d d it t th t f



automatically produce and reiterate the proper set of

forms that correspond to the particular proposed

.


LTG-4-C and LTG-6-C

The LTG-4-C (Lighting Controls Credit Worksheet) and LTG-6-C

,

submitted by hand. I strongly urge modeling all of the features of

e g ng sys em w n nergy ro so a ese w e e ou

by the program.

Wh th h d b itt d b itt d



When these pages are hand submitted or submitted

independently, they will not be included in the page count

automatically generated by the computer for a compliance

submittal. Make sure to show they are included in your submittal.


Questions?




Acceptance Requirements



1

10.2 Overview

Why?

th f ll i bl ith k d ft i t



the following problems with packaged rooftop equipment:

● Economizers having a high failure rate

● Refrigerant charge

● Simultaneous heating and cooling


● o ou oor a r

10.3 Acceptance Testing Process . . an ev ew: e nsta ng contractor, eng neer o recor ,

owner’s agent, or the person responsible for certification of the

acceptance testing/verification on the Certificate of AcceptanceRes onsible Person must review the lans and s ecifications to

ensure that they conform to the acceptance requirements. This is

typically done prior to signing a Certificate of Compliance.

● In reviewing the plans, the designer will be noting on the ENV-1C,

MECH-1C, LTG-1C and the OTLG-1C code compliance forms, allof the respective envelope, mechanical and lighting systems that

will require acceptance tests, and the parties responsible for

.



10.3.2 Construction inspections: Construction inspection must beperform before testing

10.3.3 Functional Testing: A field technician must take responsibility

for performing the required acceptance requirements procedures.

10.3.4 Certificate of compliance: Enforcement agency shall notrelease a final Certificate of Occupancy until ALL required Certificates

of Acceptance are submitted


Table 10-1 Acceptance Forms




Questions?

CEPE REVIEWER

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