23A-068 Stretch Energy Code 115AA780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
115.00: continued
G801.2 through 5 Delete subsections.
G901.3 Floodway Encroachment Reserved.
G1001.1 Replace the words “International Building Code” with “this code”.
G1001.6 Replace as follows:
G1001.6 Protection of Mechanical and Electrical Systems in a Flood-hazard Zone:
New and replacement electrical, heating, ventilating, air conditioning and other service
equipment in a flood-hazard area shall either be placed above the base flood elevation
or protected so as to prevent water from entering or accumulating within the system
components during floods up to the base flood elevation in accordance with the
mechanical code listed in Chapter 1.0. Installation of electrical wiring and outlets,
switches, junction boxes and panels below the base flood elevation shall conform to the
provisions of 527 CMR 12.00: 2008 Massachusetts Electrical Code (Amendments) listed
in Chapter 1.0 for location of such items in wet locations. Duct insulation subject to
water damage shall not be installed below the base flood elevation.
APPENDIX H: Adopted in its entirety
APPENDIX I: Adopted in its entirety.
APPENDIX J: Amend as follows:
J101.l At the end of the first sentence add this text:
'when directly associated with the construction, alteration, repair, or demolition of buildings
or structures.'
APPENDIX K: ADMINISTRATIVE PROVISIONS Reserved, not adopted.
APPENDIX AA:
APPENDIX AA: STRETCH ENERGY CODE
The Stretch Energy Code is the International Energy Conservation Code (IECC) 2009
with Massachusetts Amendments (780 CMR 115.AA).
101.1, 101.2, and 101.3 Replace as follows:
101.1 Title. This code shall be known as the Massachusetts Stretch Energy Code and shall be cited as
such. It is referred to as “this code.”
101.2 Scope. This code applies to new residential buildings, renovations of or additions to existing
residential buildings, new commercial buildings, and additions to existing commercial buildings.
Renovations of existing commercial buildings, and replacement or reconstruction of existing commercial
building components and elements, are not subject to the provisions of this code. Buildings not included
in this scope shall comply with Chapter 13 or 34 of the International Building Code 2009 with
Massachusetts Amendments (780 CMR 13.00 or 34.00) or for Single- and Two-family dwellings at
780 CMR 61.00, or 93.00, as applicable.
101.3 Purpose and Intent. The purpose of this code is to provide a more energy efficient alternative to
the base code energy for new and existing buildings. A municipality seeking to ensure that construction
within its boundaries is designed and built above the energy efficiency requirements of 780 CMR may
mandate adherence to this code.
This code may be adopted or rescinded by any municipality in the commonwealth in the manner
prescribed by law.
If adopted by a municipality ,this code, rather than Chapter 13 or 34 of the International Building Code
2009 with Massachusetts Amendments (780 CMR 13.00 or 34.00) or for Single- and Two-family dwellings
at 780 CMR 61.00, or 93.00, as applicable, shall govern.
This code shall regulate the design and construction of buildings to provide flexibility, and, permit the
use of innovative approaches and techniques to achieve effective energy use.
101.4.3 Replace Exceptions as follows
Exceptions:
8/6/10 780 CMR - Eighth Edition - 305
780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
115.00: continued
1. Storm windows installed over existing fenestration.
2. Repairs to an existing sash and frame.
3. Existing ceiling, wall or floor cavities, of the building envelope, exposed or accessible during
construction provided that any empty cavities are filled with insulation that meets or exceeds an R value
of R - 3.5/inch.
4. Reroofing or residing over uninsulated roofs or walls where the sheathing is not exposed.
5. Replacement of existing doors that separate conditioned space from the exterior shall not require
the installation of a vestibule or revolving door, provided, however, that an existing vestibule that
separates a conditioned space from the exterior shall not be removed,
6. Alterations that replace less than 50% of the luminaires in a space, provided that such alterations do
not increase the installed interior lighting power.
7. Alterations that replace only the bulb and ballast within the existing luminaires in a space provided
that the alteration does not increase the installed interior lighting power.
104.1 Replace as follows:
104.1 General. Construction or work for which a permit is required shall be subject to inspection by the
code official or approved inspection agencies.
104.5 Replace as follows:
104.5 Approved Inspection Agencies. The code official is authorized to require or accept reports of
approved inspection agencies, provided such agencies satisfy the requirements as to qualifications and
reliability.
107, 108 and 109 Delete.
202 Add definitions as follows:
FENESTRATION PRODUCT, FIELD-FABRICATED. A fenestration product including an exterior
glass door whose frame is made at the construction site of standard dimensional lumber or other materials
that were not previously cut, or otherwise formed with the specific intention of being used to fabricate a
fenestration product or exterior door. Field fabricated does not include site-built fenestration with a label
certificate or products required to have temporary or permanent labels.
FENESTRATION PRODUCT, SITE-BUILT. Fenestration designed to be field-glazed or field
assembled units using specific factory cut or otherwise factory formed framing and glazing units.
Examples of site-built fenestration include storefront systems, curtain walls, and atrium roof systems.
FURNACE ELECTRICITY RATIO. The ratio of furnace electricity use to total furnace energy
computed as ratio = (3.412*EAE)/(1000*EF + 3.412*EAE), where EAE (average annual auxiliary
electrical consumption) and EF (average annual fuel energy consumption) are defined in 10 CFR Part 430,
Subpart B, Appendix N and EF is expressed in millions of Btu’s per year.
ON-SITE RENEWABLE ENERGY. Includes solar photovoltaic; active solar thermal that employs
collection panels, heat transfer mechanical components and a defined heat storage system; wind; small
hydro; tidal; wave energy; geothermal (core earth); biomass energy systems; landfill gas and bio-fuel based
electrical production. Onsite energy shall be generated on or adjacent to the project site and shall not be
delivered to the project through the utility service.
301.1 through 301.3 Replace as follows:
301.1 General. Climate Zone 5 and moisture regime A (Moist) shall be used in determining the applicable
requirements from Chapters 4 and 5 for locations in Massachusetts.
401 Replace as follows:
401.1 Scope. Chapter 4 applies to residential buildings.
401.2 New Construction. New low-rise (three stories or less) residential buildings including townhouses
shall require a HERS (Home Energy Rating System) index rating as verified by a RESNET (Residential
Energy Services Network) certified HERS rater.
1. For units equal to or greater than 3,000 sq. ft. in conditioned floor space, a HERS rating of 65 or less
is required.
2. For units less than 3,000 sq. ft., a HERS rating of 70 or less is required.
3. In addition, all new construction shall demonstrate compliance with the Energy Star Qualified
Homes Thermal Bypass Inspection Checklist1
8/6/10 780 CMR - Eighth Edition - 306
780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
115.00: continued
401.3 Prescriptive Option for Residential Additions. Additions to an existing building, building system
or portion thereof shall conform to IECC 2009 Chapter 4, and shall further demonstrate compliance with:
1. The Energy Star Qualified Homes Thermal Bypass Inspection Checklist .1
2. Fenestration U-factor requirements as listed in Energy Star program requirements for Residential
Doors, Windows and Skylights - Version 52
3. Ducts for new HVAC systems shall be sealed and tested post-construction to demonstrate leakage
to outdoors of less than or equal to 4 cfm per 100 sq. ft. of conditioned floor area, except where the air
handler and all ducts are located within conditioned space.
401.4 Performance Option for Residential Additions. The performance approach and HERS ratings of
401.2 may be followed in lieu of the prescriptive requirements of section 401.3
401.5 Prescriptive Option for Alterations, Renovations or Repairs. Alterations, renovations or repairs
that involve accessing the building envelope shall require the affected portion of the envelope to comply
with 401.3. Envelope insulation shall meet or exceed IECC 2009 requirements (Chapter 4, section 402)
for climate zone 5, or fully fill existing cavities with insulating material which meets or exceeds an R value
of R 3.5/inch.
401.6 Performance Option for Alternations, Renovations or Repairs. In all cases of alternations,
renovations or repairs the performance approach of 401.2 may be followed in lieu of the prescriptive
requirements of section 401.5 with the following HERS rating requirements:
1. For units equal to or greater than 2,000 sq. ft. in conditioned floor space, a HERS rating of 80 or less
is required.
2. For units less than 2,000 sq. ft., a HERS rating of 85 or less is required.
3. Compliance with the Energy Star Qualified Homes Thermal Bypass Inspection Checklist.
1 http://www.energystar.gov/ia/partners/bldrs_lenders_raters/downloads/Thermal_Bypass_Inspection_Checklist.pdf.
2 http://www.energystar.gov/ia/partners/prod_development/archives/downloads/windows_doors/WindowsDoorsSkylightsProg
Requirements7Apr09.pdf.
Chapter 5 Change title to:
CHAPTER 5 ADVANCED COMMERCIAL ENERGY EFFICIENCY
501.1 and 501.2 Replace as follows:
501.1 Scope. The requirements contained in this chapter are applicable to new construction of commercial
buildings, or portions of commercial buildings.
Exceptions:
1. Commercial buildings less than 5,000 sq. ft.
2. Commercial buildings from 5,000 to 40,000 sq. ft. in area with these uses:
a. Supermarkets
b. Warehouses
c. Laboratories
d. A building of specialized use by variance to this code through appeal to the BBRS.
501.1.1 Buildings Greater that 100,000 sq. ft. Buildings greater than 100,000 sq. ft., and additions
to such buildings greater than or equal to 30% of the existing conditioned floor area, shall be designed
to achieve energy use per square foot equal to at least 20% below the energy requirements of
ASHRAE/IESNA Standard 90.1-2007, Energy Standard for Buildings Except for Low-Rise Residential
Buildings, Appendix G, measured by industry-accepted energy modeling.
501.1.2 Mandatory Requirements for Buildings Subject to 501.1.1. Buildings subject to 501.1.1
must comply with:
1. the mandatory requirements set forth in sections 502.4, 503.2, 504 and 505, or
2. the mandatory requirements of ASHRAE Standard 90.1-2007: 5.4, 6.4, 7.4, 8.4, 9.4, 10.4.
3. the lighting power density requirements of TABLE 505.5.2
501.1.3 Special Energy use Buildings. Buildings greater than 40,000 sq. ft. in area, and additions to
such buildings greater than or equal to 30% of the existing conditioned floor area with these uses:
1. Supermarkets
2. Warehouses
8/6/10 780 CMR - Eighth Edition - 307
780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
115.00: continued
3. Laboratories
shall be designed to comply with the performance requirements of 501.1.1.
501.1.4 Performance Option for Buildings from 5,000 to 100,000 sq. ft. Buildings between 5,000
sq. ft. and 100,000 sq. ft., and additions to such buildings greater than or equal to 30% of the existing
conditioned floor area where the addition has its own heating system, shall comply with the performance
requirements of 501.1.1, or the prescriptive option 501.2.
501.2 Prescriptive Option for Buildings from 5,000 to 100,000 sq. ft. Buildings from 5,000 to 100,000
sq. ft., and additions to such buildings greater than or equal to 30% of the existing conditioned floor area
where the addition has its own heating system, shall comply with the requirements in sections 502, 503,
504, 505, and 507.
Compliance with section 507 requires complying with any ONE of the following prescriptive options:
1. 507.2.1 Efficient Mechanical Equipment
2. 507.2.2 Reduced Lighting Power Density
3. 507.2.3 On-Site Supply of Renewable Energy
Compliance with section 507 does not remove the requirement to comply with any other mandatory
requirements in this code.
502.1.1 Delete from this section the last sentence.
Table 502.1.2, Table 502.2(1) and Table 502.2(2) Replace as follows:
TABLE 502.1.2 - BUILDING ENVELOPE REQUIREMENTS OPAQUE ELEMENT,
MAXIMUM U-FACTORS
Roofs All Other Group R
Insulation entirely above deck U - 0.039 U - 0.039
Metal buildings (with R-5 thermal blocks)U - 0.049 U - 0.049
Attic and other U - 0.027 U - 0.027
Walls, Above Grade
Mass, exterior insulation U- 0.080 U- 0.071
Mass, interior insulation U- 0.085 U- 0.085
Metal building U- 0.061 U- 0.061
Metal framed U- 0.064 U- 0.057
Wood framed and other U- 0.051 U- 0.051
Walls, Below Gradea
Mass, exterior insulation C- 0.119 C- 0.119
Mass, interior insulation C- 0.063 C- 0.063
Floors
Mass U- 0.074 U- 0.064
Metal Joist U- 0.033 U- 0.033
Wood Joist/Framing U- 0.033 U- 0.033
Slab-on-Grade Floors
Unheated slabs F- 0.540 F- 0.520
Heated slabs F- 0.580 F- 0.580
Opaque Doors
Swinging U- 0.37 U- 0.37
Roll-up or sliding U- 0.50 U- 0.50
For SI: 1 inch = 25.4 mm. ci – Continuous Insulation
a. When heated slabs are placed below grade, below grade walls must meet the F-factor requirements for perimeter insulation
according to the heated slab-on-grade construction.
8/6/10 780 CMR - Eighth Edition - 308
780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
115.00: continued
TABLE 502.2 - BUILDING ENVELOPE REQUIREMENTS - OPAQUE ASSEMBLIES
Roofs All Other Group R
Note: IECC 2009
equivalent
Insulation entirely above deck R-25 ci R-25 ci Zone 7
Metal buildings (with R-5 thermal blocks )R-13 + R-19 R-19 + R-10 Zone 7a,b
Attic and other R-38 R-38 Zone 2-7
Walls, Above Grade
Mass, exterior insulation R-11.4 ci R-13.3 ci Zone 5
Mass, interior insulation R-13 R-13 N/A
Metal building R-13 + R-5.6 ci R-13 + R-5.6 ci Zone 5-6c
Metal framed R-13 + R-7.5 ci R-13 + R-7.5 ci Zone 5-6
Wood framed and other R-13 + R-7.5 R-13 + R-7.5 Zone 6
Walls, Below Graded
Mass, exterior insulation R-7.5 ci R-7.5 ci Zone 5-6
Mass, interior insulation R-19 R-19 N/A
Floors
Mass R-10 ci R-12.5 ci Zone 5
Metal Joist R-30 R-30 Zone 4-8
Wood Joist/Framing R-30 R-30 Zone 4-8
Slab-on-Grade Floors
Unheated slabs R-10 for 24 in. below R-15 for 24 in. below Zone 6
Heated slabs R-15 for 36 in. + R-5
ci below
R-15 for 36 in. + R-5
ci below
NBI Core
Performance Values
Opaque Doors
Swinging U – 0.37 U – 0.37
Roll-up or sliding R – 4.75 R – 4.75
For SI: 1 inch = 25.4 mm. ci – Continuous Insulation. NR – No Requirement
a. Thermal blocks are a minimum R-5 of rigid insulation, which extends one-inch beyond the width of the purlin on each side,
perpendicular to the purlin.
b. The first R-value is for faced fiberglass insulation batts draped over purlins. The second R-value is for unfaced fiberglass
insulation batts installed parallel to the purlins. A minimum R-3.5 thermal spacer block is placed above the purlin/batt, and the roof
deck is secured to the purlins. Reference: ASHRAE/IESNA 90.1 Table A2.3 including Addendum “G”
c. The first R-value is for faced fiberglass insulation batts installed perpendicular and compressed between the metal wall panels
and the steel framing. The second rated R-value of insulation is for insulation installed from the inside, covering the girts.
Reference: ASHRAE/IESNA 90.1 Table A3.2 Appendix “G”
d. When heated slabs are placed below grade, below grade walls must meet the exterior insulation requirements for perimeter
insulation according to the heated slab-on-grade construction.
502.3.2 and Table 502.3 Replace as follows:
502.3.2 Maximum U-factor and SHGC. For vertical fenestration, the maximum U-factor and solar heat
gain coefficient (SHGC) shall be as specified in Table 502.3, which is uniformly set at 0.40. For skylights,
the limit is set at 3% of roof area, but can be expanded to 5% of roof area in conjunction with automatic
daylighting controls. In all cases, the maximum U-factor and solar heat gain coefficient (SHGC) shall be
as specified in Table 502.3.
8/6/10 780 CMR - Eighth Edition - 309
780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
115.00: continued
TABLE 502.3 - BUILDING ENVELOPE REQUIREMENTS: FENESTRATION
All
Framing materials other than metal with or without metal reinforcement or cladding
U-Factor 0.35
Metal framing with or without thermal break
Curtain Wall/Storefront U-Factor 0.42
Entrance Door U-Factor 0.80
All Other U-Factor 0.45a
SHGC-All Frame Types
SHGC 0.40
Skylights (3% maximum, or 5% maximum with automatic daylighting controls )b
U-Factor 0.45
SHGC 0.40
a. All other includes operable windows, fixed windows and doors other than entrance doors.
b. Automatic daylighting controls shall meet the requirements of section 505.2.2.1.3
502.4.1 and 502.4.2 Replace as follows:
502.4.0 Air Barriers. The building envelope shall be designed and constructed with a continuous air
barrier to control air leakage into, or out of the conditioned space. An air barrier system shall also be
provided for interior separations between conditioned space and space designed to maintain temperature
or humidity levels which differ from those in the conditioned space by more than 50% of the difference
between the conditioned space and design ambient conditions.
The air barrier shall have the following characteristics:
1. It must be continuous, with all joints made airtight.
2. Materials used for the air barrier system shall have an air permeability not to exceed 0.004 cfm/ft2
under a pressure differential of 0.3 in. water (1.57psf) (75 Pa) when tested in accordance with ASTM
E 2178. Air barrier materials shall be taped or sealed in accordance with the manufacturer's instructions.
3. It shall be capable of withstanding positive and negative combined design wind, fan and stack
pressures on the envelope without damage or displacement, and shall transfer the load to the structure.
It shall not displace adjacent materials under full load.
4. Air barrier materials shall be maintainable, or, if inaccessible, shall meet the durability requirements
for the service life of the envelope assembly.
5. The air barrier material of an envelope assembly shall be joined and sealed in a flexible manner to
the air barrier material of adjacent assemblies, allowing for the relative movement of assemblies due to
thermal and moisture variations and creep. Connections shall be made between:
a. joints around fenestration and door frames
b. junctions between walls and foundations, between walls at building corners, between walls and
structural floors or roofs, and between walls and roof or wall panels
c. openings at penetrations of utility services through roofs, walls, and floors
d. site-built fenestration and doors
e. building assemblies used as ducts or plenums
f. joints, seams, and penetrations of vapor retarders
g. all other openings in the building envelope.
502.4.0.1 Air Barrier Penetrations. All penetrations of the air barrier and paths of air
infiltration/exfiltration shall be made air tight.
502.4.1 Window and Door Assemblies. The air leakage of window, skylight and door assemblies that
are part of the building envelope shall be determined in accordance with AAMA/WDMA/CSA
101/I.S.2/A440, or NFRC 400 by an accredited, independent laboratory, and labeled and certified by
the manufacturer. Window and skylight air leakage shall not exceed 0.2 cfm/ft at 1.57 pounds per2
square foot (psf) (75Pa), or 0.3 cfm/ft at 6.24 psf (300 Pa). Door assembly air leakage shall not exceed2
0.3 cfm/ft for all other products at 1.57 psf (75Pa).2
Exceptions:
1. Site-constructed windows and doors that are sealed in accordance with section 502.4.8.
2. Commercial entrance doors covered by section 502.4
8/6/10 780 CMR - Eighth Edition - 310
780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
115.00: continued
3. Garage doors shall be permitted to use air leakage determined by test at standard test conditions
in accordance with ANSI/DASMA 105.
4. Doors and Access Openings to Shafts, Chutes, Stairwells, and Elevator Lobbies. These doors and
access openings shall either meet the requirements of 502.4.3 or shall be equipped with weather seals,
except weatherseals on elevator lobby doors are not required when a smoke control system is
installed.
502.4.2 Curtain Wall, Storefront Glazing and Commercial Entrance Doors. Curtain wall,
storefront glazing and commercial-glazed swinging entrance doors and revolving doors shall be tested
for air leakage at a pressure of at least 1.57 pounds per square foot (psf) (75 Pa) in accordance with
ASTM E 283. For curtain walls and storefront glazing, the maximum air leakage rate shall be 0.06
cubic foot per minute per square foot (cfm/ft ) (1.1 m /h × m ) of fenestration area. For commercial232
glazed swinging entrance doors and revolving doors, the maximum air leakage rate shall be 1.00 cfm/ft2
(18.3 m /h × m ) of door area when tested in accordance with ASTM E 283.3 2
502.4.5 Replace as follows:
502.4.5 Outdoor Air Intakes and Exhaust Openings. Stair and elevator shaft vents and other outdoor
air intakes and exhaust openings integral to the building envelope shall be equipped with not less than
a Class I motorized, leakage-rated damper with a maximum leakage rate of 4 cfm per square foot (6.8
L/s A C m ) at 1.0 inch water gauge (w.g.) (1250 Pa) when tested in accordance with AMCA 500D. 2
These air tight, operable dampers shall be installed when the air barrier is penetrated by:
1. Fixed open louvers such as in elevator shafts and machine rooms.
2. Mechanical system components which allow infiltration or exfiltration of air when the systems
are inactive, such as atrium smoke exhaust systems, elevator shaft smoke relief openings, and other
similar elements.
Such dampers shall be set in the closed position and automatically open upon:
1. the activation of any fire alarm initiating device of the building's fire alarm system;
2. the interruption of power to the damper.
Exception. Gravity (nonmotorized) dampers are permitted to be used in buildings less than three
stories in height above grade plane.
502.4.7 Replace as follows:
502.4.7 Vestibules. Building entrances that separate conditioned space from the exterior shall be
protected with an enclosed vestibule, with all doors opening into and out of the vestibule equipped with
self-closing devices. Vestibules shall be designed so that in passing through the vestibule it is not
necessary for the interior and exterior doors to open at the same time. Interior and exterior doors shall
have a minimum distance between them of not less than seven feet when in the closed position. The
exterior envelope of conditioned vestibules shall comply with the requirements for a conditioned space.
The interior and exterior envelope of unconditioned vestibules shall comply with the requirements for
a semi-heated space.
Exceptions:
1. Building entrances with revolving doors.
2. Doors not intended to be used as a building entrance.
3. Doors opening directly from a dwelling unit.
4. Doors that open directly from a space that is less than 3000 ft in area and is separate from the2
building entrance.
5. Doors used primarily to facilitate vehicular movement or material handling and adjacent
personnel doors.
502.5 Add sections:
502.5 Vapor Retarders. Class I or II vapor retarders are required on the interior side of walls.
Exceptions:
1. Basement walls.
2. Below grade portion of any wall.
3. Construction where moisture or its freezing will not damage the materials.
502.5.1 Class III Vapor Retarders. Class III vapor retarders shall be permitted where any one of the
conditions in Table 502.5.1 are met.
8/6/10 780 CMR - Eighth Edition - 311
780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
115.00: continued
TABLE 502.5.1 - CLASS III VAPOR RETARDERS
Climate Zone Class III vapor retarders permitted for:
5
Vented cladding over OSB
Vented cladding over Plywood
Vented cladding over Fiberboard
Vented cladding over Gypsum
Insulated sheathing with R-value >= R5 over 2x4 wall
Insulated sheathing with R-value >= R7.5 over 2x6 wall
502.5.2 Material Vapor Retarder Class. The vapor retarder class shall be based on the manufacturer’s
certified testing or a tested assembly. The following shall be deemed to meet the class specified:
Class I: Sheet polyethylene, non-perforated aluminum foil
Class II: Kraft faced fiberglass batts or low perm paint (paint with 0.1 < perm #1.0)
Class III: Latex or enamel paint
503.1 Add this note:
NOTE. Compliance path a. (Efficient Mechanical Equipment) in section 507 is not available for
equipment installed according to the minimum performance values outlined in section 503.2.3. In this case,
compliance can be met with one of the following paths:
b. 507.2.2 Reduced Lighting Power Density
c. 507.2.3 On-Site Supply of Renewable Energy
503.2.1 Replace as follows:
503.2.1 Calculation of Heating and Cooling Loads. Design loads shall be determined in accordance with
the procedures described in the ASHRAE/ACCA Standard 183. The design loads shall include an accurate
representation of the building envelope, lighting, ventilation and occupancy loads based on the specific
design characteristics of the project. Heating and cooling loads shall be adjusted to account for load
reductions that are achieved when energy recovery systems are utilized in the HVAC system in accordance
with the ASHRAE HVAC Systems and Equipment Handbook. Alternatively, design loads shall be
determined by an approved equivalent computation procedure, using the design parameters specified in
IECC 2009 Chapter 3.
503.2.5.1 Add these two exceptions
25. Building spaces where CO Sensors are inappropriate measures for ventilation needs because of
ventilation needs other than occupant requirements.
6. Building spaces where the primary ventilation needs are for process loads.
503.2.9 – 503.2.9.3 Replace as follows:
503.2.9 Mechanical Systems Commissioning and Completion Requirements.
503.2.9.1 System Commissioning. Commissioning is a process that verifies and documents that the
selected building systems have been designed, installed, and function according to the owner’s project
requirements and construction documents. Drawing notes shall require commissioning and completion
requirements in accordance with this section. Drawing notes may refer to specifications for further
requirements. Copies of all documentation shall be given to the owner. The building official may
request commissioning documentation for review purposes. At the time of plan submittal, the building
jurisdiction shall be provided, by the submittal authority, a letter of intent to commission the building
in accordance with this code.
503.2.9.1.1 Commissioning Plan. A commissioning plan shall include as a minimum the following
items:
1. A detailed explanation of the original owner’s project requirements,
2. A narrative describing the activities that will be accomplished during each phase of
commissioning, including guidance on who accomplishes the activities and how they are
completed,
3. Equipment and systems to be tested, including the extent of tests,
4. Functions to be tested (for example calibration, economizer control, etc.),
5. Conditions under which the test shall be performed (for example winter and summer design
conditions, full outside air, etc.), and
6. Measurable criteria for acceptable performance.
8/6/10 780 CMR - Eighth Edition - 312
780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
115.00: continued
503.2.9.1.2 Systems Adjusting and Balancing. All HVAC systems shall be balanced in accordance
with generally accepted engineering standards. Air and water flow rates shall be measured and
adjusted to deliver final flow rates within 10% of design rates. Test and balance activities shall
include as a minimum the following items:
1. Air Systems Balancing. Each supply air outlet and zone terminal device shall be equipped
with means for air balancing in accordance with the requirements of Chapter 6 of the International
Mechanical Code 2009. Discharge dampers are prohibited on constant volume fans and variable
volume fans with motors ten hp (18.6 kW) and larger. Air systems shall be balanced in a manner
to first minimize throttling losses then, for fans with system power of greater than one hp, fan
speed shall be adjusted to meet design flow conditions.
Exception. Fans with fan motors of one hp or less.
2. Hydronic Systems Balancing. Individual hydronic heating and cooling coils shall be equipped
with means for balancing and pressure test connections. Hydronic systems shall be proportionately
balanced in a manner to first minimize throttling losses, then the pump impeller shall be trimmed
or pump speed shall be adjusted to meet design flow conditions. Each hydronic system shall have
either the ability to measure pressure across the pump, or test ports at each side of each pump.
Exceptions:
1. Pumps with pump motors of five hp or less.
2. When throttling results in no greater than 5% of the nameplate horsepower draw above that
required if the impeller were trimmed.
503.2.9.1.3 Functional Performance Testing.
503.2.9.1.3.1 Equipment Functional Performance Testing. Equipment functional performance
testing shall demonstrate the correct installation and operation of components, systems, and
system-to-system interfacing relationships in accordance with approved plans and specifications.
This demonstration is to prove the operation, function, and maintenance serviceability for each of
the Commissioned systems. Testing shall include all modes of operation, including:
1. All modes as described in the Sequence of Operation,
2. Redundant or automatic back-up mode,
3. Performance of alarms, and
4. Mode of operation upon a loss of power and restored power.
Exception. Unitary or packaged HVAC equipment listed in Tables 503.2.3(1) through (3) that
do not require supply air economizers.
503.2.9.1.3.2 Controls Functional Performance Testing. HVAC control systems shall be tested
to document that control devices, components, equipment, and systems are calibrated, adjusted and
operate in accordance with approved plans and specifications. Sequences of operation shall be
functionally tested to document they operate in accordance with approved plans and specifications.
503.2.9.1.4 Preliminary Commissioning Report. A preliminary report of commissioning test
procedures and results shall be completed and provided to the Owner. The report shall be identified
as “Preliminary Commissioning Report” and shall identify:
1. Itemization of deficiencies found during testing required by this section which have not been
corrected at the time of report preparation and the anticipated date of correction.
2. Deferred tests which cannot be performed at the time of report preparation due to climatic
conditions.
3. Climatic conditions required for performance of the deferred tests, and the anticipated date of
each deferred test.
503.2.9.2 Acceptance. Buildings, or portions thereof, required by this code to comply with this section
shall not be issued a certificate of occupancy until such time that the building official has received a
letter of transmittal from the building owner that states they have received the Preliminary
Commissioning Report as required by section 503.2.9.1.4. At the request of the building official, a copy
of the Preliminary Commissioning Report shall be made available for review.
503.2.9.3 Completion Requirements. The construction documents shall require that within 90 days
after the date of certificate of occupancy, the documents described in this section be provided to the
building owner.
503.2.9.3.1 Drawings. Construction documents shall include as a minimum the location and
performance data on each piece of equipment.
8/6/10 780 CMR - Eighth Edition - 313
780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
115.00: continued
503.2.9.3.2 Manuals. An operating manual and a maintenance manual shall be in accordance with
industry-accepted standards and shall include, at a minimum, the following:
1. Submittal data stating equipment size and selected options for each piece of equipment
requiring maintenance.
2. Manufacturer’s operation manuals and maintenance manuals for each piece of equipment
requiring maintenance, except equipment not furnished as part of the project. Required routine
maintenance actions shall be clearly identified.
3. Names and addresses of at least one service agency.
4. HVAC controls system maintenance and calibration information, including wiring diagrams,
schematics, and control sequence descriptions. Desired or field-determined setpoints shall be
permanently recorded on control drawings at control devices or, for digital control systems, in
programming comments.
5. A complete narrative of how each system is intended to operate, including suggested setpoints.
503.2.9.3.3 System Balancing Report. A written report describing the activities and measurements
completed in accordance with section 503.2.9.1.2
503.2.9.3.4 Final Commissioning Report. A complete report of test procedures and results
identified as “Final Commissioning Report” shall include:
1. Results of all Functional Performance Tests.
2. Disposition of all deficiencies found during testing, including details of corrective measures
used or proposed.
3. All Functional Performance Test procedures used during the commissioning process including
measurable criteria for test acceptance, provided herein for repeatability.
Exception. Deferred tests which cannot be performed at the time of report preparation due to
climatic conditions.
505.2.2.1 and 505.2.2.2 Replace as follows:
505.2.2.1 Automatic Lighting Controls. All commercial buildings shall be equipped with automatic
control devices to shut off lighting in compliance with one of the following automatic control
technologies:
1. Section 505.2.2.1.1 Occupancy Sensors
2. Section 505.2.2.1.2 Time Clock Controls
3. Section 505.2.2.1.3 Automatic Daylighting Controls
505.2.2.1.1 Occupancy Sensors. Occupancy sensors must be installed in all classrooms,
conference/meeting rooms, employee lunch and break rooms, private offices, restrooms, storage
rooms and janitorial closets, and other spaces 300 sq. ft. or less enclosed by ceiling height partitions.
These automatic control devices shall be installed to automatically turn off lights within 30 minutes
of all occupants leaving the space, except spaces with multi-scene control.
505.2.2.1.2 Time Clock Controls. In areas not controlled by occupancy sensors, automatic time
switch control devices shall be used. It shall incorporate an override switching device that:
1. Is readily accessible.
2. Is located so that a person using the device can see the lights or the area controlled by that
switch, or so that the area being lit is annunciated.
3. Is manually operated.
4. Allows the lighting to remain on for no more than four hours when an override is initiated.
5. Controls an area not exceeding 5,000 square feet (465 m ).2
Exceptions:
1. In malls and arcades, auditoriums, single-tenant retail spaces, industrial facilities and arenas,
where captive-key override is utilized, override time may exceed two hours.
2. In malls and arcades, auditoriums, single-tenant retail spaces, industrial facilities and arenas,
the area controlled may not exceed 20,000 square feet (1860 m ).2
505.2.2.1.3 Automatic Daylighting Controls. Automatic controls installed in day lit zones must
control lights in the day lit areas separately from the non-day lit areas. Controls for calibration
adjustments to the lighting control device shall be readily accessible to authorized personnel. Each
daylight control zone shall not exceed 2,500 square feet. Automatic daylighting controls must
incorporate an automatic shut-off ability based on time or occupancy in addition to lighting power
reduction controls.
8/6/10 780 CMR - Eighth Edition - 314
780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
115.00: continued
Controls will automatically reduce lighting power in response to available daylight by either one
of the following methods:
1. Continuous Dimming using dimming ballasts and daylight-sensing automatic controls that
are capable of reducing the power of general lighting in the day lit zone continuously to less than
35% of rated power at maximum light output.
2. Stepped Dimming using multi-level switching and daylight-sensing controls that are capable
of reducing lighting power automatically. The system should provide at least two control channels
per zone and be installed in a manner such that at least one control step shall reduce power of
general lighting in the daylit zone by 30% to 50% of rated power and another control step that
reduces lighting power by 65% to 100%. Stepped dimming control is not appropriate in
continuously occupied areas with ceiling heights of 14 feet or lower.
Exception. Daylight spaces enclosed by walls or ceiling height partitions and containing two
or fewer luminaire are not required to have a separate switch for general area lighting.
505.2.2.3 Retain this section.
505.2.3 Replace as follows:
505.2.3 Additional Controls for Specific Uses.
1. Display/Accent Lighting. Display or accent lighting shall have a separate control device.
2. Case Lighting. Lighting in cases used for display purposes shall have a separate control device.
3. Hotel and Motel Guest Room Lighting. Hotel and motel guest rooms and guest suites shall have
a master control device at the main room entry that controls all permanently installed luminaires and
switched receptacles.
4. Task Lighting. Supplemental task lighting, including permanently installed undershelf or
undercabinet lighting, shall have a control device integral to the luminaires or be controlled by a wall-
mounted control device provided the control device is readily accessible and located so that the occupant
can see the controlled lighting.
5. Nonvisual Lighting. Lighting for nonvisual applications, such as plant growth and food warming,
shall have a separate control device.
6. Demonstration Lighting. Lighting equipment that is for sale or for demonstrations in lighting
education shall have a separate control device.
Exceptions: 1., 2. and 4. where LED lighting is used no additional control is required.
505.5.2 Insert note as follows:
NOTE. Compliance path b. (Reduced Lighting Power Density) in section 507 is not available for
lighting installed according to the values in table 505.5.2. In this case, compliance can be met with one
of the following paths:
a. 507.2.1 Efficient Mechanical Equipment
c. 507.2.3 On-Site Supply of Renewable Energy
8/6/10 780 CMR - Eighth Edition - 315
780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
115.00: continued
Replace, but retain notes and exception, Table 505.5.2 with:
TABLE 505.5.2 - INTERIOR LIGHTING POWER ALLOWANCES
LIGHTING POWER DENSITY
Whole Building Space by Space
Building Area Type (W/ft )a 2
Active Storage 0.8
Atrium – First Three Floors 0.6
Atrium – Each Additional Floor 0.2
Classroom/lecture/training 1.3
Conference/Meeting/Multipurpose 1.3
Corridor/Transition 0.5
Dressing/Locker/Fitting Room 0.6
Electrical/Mechanical 1.5
Food Preparation 1.2
Inactive Storage 0.3
Laboratory 1.4
Lobby 1.1
Restroom 0.8
Stairway 0.6
Automotive Facility 0.9
Automotive – Service Repair 0.7
Convention Center 1.2
Exhibit Space 1.3
Audience/Seating Area 0.9
Courthouse 1.2
Audience/Seating Area 0.9
Courtroom 1.9
ConWnement Cells 0.9
Judges Chambers 1.3
Dining: Bar Lounge/Leisure 1.3
Lounge/Leisure Dining 1.4
Dining: Cafeteria/Fast Food 1.4
Dining: Family 1.6
Dining 1.4
Kitchen 1.2
Dormitory 1.0
Living Quarters 1.1
Bedroom 0.5
Study Hall 1.4
Exercise Center 1.0
Dressing/Locker/Fitting Room 0.6
Audience/Seating Area 0.3
Exercise Area 0.9
Exercise Area/Gymnasium 1.4
Gymnasium 1.1
Dressing/Locker/Fitting Room 0.6
Audience/Seating Area 0.4
Playing Area 1.4
Exercise Area 0.9
Healthcare Clinic 1.0
Corridors w/patient waiting, exam 1.0
Exam/Treatment 1.5
Emergency 2.7
Public & Staff Lounge 0.8
Hospital/Medical supplies 1.4
Hospital - Nursery 0.6
Nurse station 1.0
Physical therapy 0.9
8/6/10 780 CMR - Eighth Edition - 316
780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
115.00: continued
TABLE 505.5.2 - INTERIOR LIGHTING POWER ALLOWANCES - continued
LIGHTING POWER DENSITY
Whole Building Space by Space
Building Area Type (W/ft )a 2
Patient Room 0.7
Pharmacy 1.2
Hospital/Radiology 0.4
Operating Room 2.2
Recovery 0.8
Active storage 0.9
Laundry-Washing 0.6
Hospital 1.2
Hotel 1.0
Dining Area 1.3
Guest quarters 1.1
Reception/Waiting 2.5
Lobby 1.1
Library 1.3
Library-Audio Visual 0.7
Stacks 1.7
Card File & Cataloging 1.1
Reading Area 1.2
Manufacturing Facility 1.3
Low bay (< 25 ft Floor to Ceiling Height)1.2
High bay (>25 ft Floor to Ceiling Height)1.7
Detailed Manufacturing 2.1
Equipment Room 1.2
Control Room 0.5
Motel 1.0
Dining Area 1.2
Guest quarters 1.1
Reception/Waiting 2.1
Motion Picture Theater 1.2
Audience/Seating Area 1.2
Lobby 1.0
Multi-Family 0.7
Museum 1.1
Active Storage 0.8
General exhibition 1.0
Restoration 1.7
Bank/Office – banking activity area 1.5
Office 0.9
Enclosed 1.0
Open Plan 1.0
Parking Garage 0.3
Penitentiary 1.0
Performing Arts Theater 1.6
Audience/Seating Area 2.6
Lobby 3.3
Dressing/Locker/Fitting Room 1.1
Police Stations 1.0
Fire Stations 0.8
Fire Station Engine Room 0.8
Sleeping Quarters 0.3
Audience/Seating Area 0.8
Police Station Laboratory 1.4
Post Office 1.1
Sorting Area 1.2
8/6/10 780 CMR - Eighth Edition - 317
780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
115.00: continued
TABLE 505.5.2 - INTERIOR LIGHTING POWER ALLOWANCES - continued
LIGHTING POWER DENSITY
Whole Building Space by Space
Building Area Type (W/ft )a 2
Lobby 1.0
Religious Buildings 1.3
Lobby 1.7
Worship/Pulpit/Choir 2.4
Retail 1.3b
Department Store Sales Area 1.3
Specialty Store Sales Area 1.8
Fine Merchandise Sales Area 2.9
Supermarket Sales Area 1.3
Personal Services Sales Area 1.3
Mass Merchandising Sales Area 1.3
Mall Concourse 1.7
School/University 1.2
Classroom 1.3
Audience 0.7
Dining 1.1
Office 1.1
Corridor 0.5
Storage 0.5
Laboratory 1.1
Sports Arena 1.1
Ring Sports Arena 2.7
Court Sports Arena 2.3
Indoor Playing Field Arena 1.4
Town Hall 1.1
Transportation 1.0
Dining Area 2.1
Baggage Area 1.0
Airport - Concourse 0.6
Terminal - Ticket Counter 1.5
Reception/Waiting 0.5
Warehouse 0.8
Fine Material 1.4
Medium/Bulky Material 0.9
Workshop 1.4
506 Replace as follows:
SECTION 506: TOTAL BUILDING PERFORMANCE
As referenced in section 501.1, buildings establishing compliance with this code through total building
performance shall be designed to achieve energy use per square foot equal to at least 20% below the energy
requirements of ASHRAE/ IESNA Standard 90.1-2007, Energy Standard for Buildings Except for Low-Rise
Residential Buildings, Appendix G, measured by industry-accepted energy modeling.
507 Add section as follows:
SECTION 507: ALTERNATIVE PRESCRIPTIVE COMPLIANCE PACKAGES
507.1 Requirements. Buildings complying with the prescriptive option of section 501.4.1 shall meet the
requirements of any one of the following sections:
a. 507.2.1 Efficient Mechanical Equipment
b. 507.2.2 Reduced Lighting Power Density
c. 507.2.3 On-Site Supply of Renewable Energy
8/6/10 780 CMR - Eighth Edition - 318
780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
115.00: continued
507.2.1 Efficient Mechanical Equipment. This mechanical alternative compliance option is intended to
allow the builder to meet the requirements of section 507 by choosing to install efficient mechanical
equipment. Section 507.2.1 does not replace the requirements in section 503, but is one of several optional
compliance packages.
Mechanical equipment choices that fulfill requirements for section 507.2.1 shall comply with the
following:
1. Package unitary equipment shall meet the minimum efficiency requirements in Tables 507.2.1(1)
and 507.2.1(2);
2. Package Terminal Air Conditioners and Heat Pumps shall meet the minimum efficiency
requirements in Table 507.2.1(3);
3. Warm air furnaces and combination warm air furnaces / air conditioning units shall meet the
minimum efficiency requirements in Table 507.2.1(4);
4. Boilers shall meet the minimum efficiency requirements in Table 507.2.1(5);
5. Electric chillers shall meet the energy efficiency requirements in Table 507.2.1(6);
6. Absorption chillers shall meet the minimum efficiency requirements in Table 507.2.1(7).
TABLE 507.2.1(1) UNITARY AIR CONDITIONERS AND CONDENSING UNITS,
ELECTRICALLY OPERATED, EFFICIENCY REQUIREMENTS
Equipment Type Size Category
Subcategory or
Rating Condition
Minimum
Efficiencya
Air conditioners,
Air cooled
< 65,000 Btu/h
Split system 15.0 SEER
12.5 EER
Single package 15.0 SEER
12.0 EER
$ 65,000 Btu/h and
< 135,000 Btu/h
Split system and
single package
11.5 EERb
11.9 IPLVb
$ 135,000 Btu/h and <
240,000 Btu/h
Split system and
single package
11.5 EERb
11.9 IPLVb
$ 240,000 Btu/h and <
760,000 Btu/h
Split system and
single package
10.5 EERb
10.9 IPLVb
$ 760,000 Btu/h 9.7 EERb
11.0 IPLVb
Air conditioners, Water and
evaporatively cooled
Split system and
single package
14.0 EER
For SI: 1 British thermal unit per hour = 0.2931 W.
a. IPLVs are only applicable to equipment with capacity modulation.
b. Deduct 0.2 from the required EERs and IPLVs for units with a heating section other than electric resistance heat.
8/6/10 780 CMR - Eighth Edition - 319
780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
115.00: continued
TABLE 507.2.1(2) UNITARY AND APPLIED HEAT PUMPS, ELECTRICALLY
OPERATED, EFFICIENCY REQUIREMENTS
Equipment Type
Size Category Subcategory or
Rating Condition
Minimum
Efficiencya
Air cooled
(Cooling mode)
< 65,000 Btu/h
Split system 15.0 SEER
12.5 EER
Single package 15.0 SEER
12.0 EER
$ 65,000 Btu/h and
< 135,000 Btu/h
Split system and
single package
11.5 EERb
11.9 IPLVb
$135,000 Btu/h and
< 240,000 Btu/h
Split system and
single package
11.5 EERb
11.9 IPLVb
$ 240,000 Btu/h Split system and
single package
10.5 EERb
10.9 IPLVb
Water source
(Cooling mode)< 135,000 Btu/h 85EF entering water 14.0 EER
Air cooled
(Heating mode)
< 65,000 Btu/h
(Cooling capacity)
Split system 8.5 HSPF
Single package 8.0 HSPF
$ 65,000 Btu/h and < 135,000
Btu/h (Cooling capacity)
47EF db/43EF wb
outdoor air
3.4 COP
77EF db/15EF wb
outdoor air
2.4 COP
$ 135,000 Btu/h
(Cooling capacity)
47EF db/43EF wb
outdoor air 3.1 COP
77EF db/15EF wb
outdoor air 2.1 COP
Water source
(Heating mode)
< 135,000 Btu/h
(Cooling capacity)70EF entering water 4.6 COP
For SI: EC = [(EF) - 32] / 1.8, 1 British thermal unit per hour = 0.2931 W. db = dry-bulb temperature, EF; wb = wet-
bulb temperature, EF
a. IPLVs and Part load rating conditions are only applicable to equipment with capacity modulation.
b. Deduct 0.2 from the required EERs and IPLVs for units with a heating section other than electric resistance heat.
TABLE 507.2.1(3) PACKAGED TERMINAL AIR CONDITIONERS AND
PACKAGED TERMINAL HEAT PUMPS
Equipment Type Size Category
Minimum
Efficiency
Air conditioners < 7,000 Btu / h 11.9 EER
& Heat Pumps
(Cooling Mode)
7,000 Btu / h and < 10,000 Btu / h 11.3 EER
10,000 Btu / h and < 13,000 Btu / h 10.7 EER
$ 13,000 Btu / h 9.5 EER
Note. Replacement units must be factory labeled as follows: “MANUFACTURED FOR REPLACEMENT
APPLICATIONS ONLY: NOT TO BE INSTALLED IN NEW CONSTRUCTION PROJECTS.” Replacement
efficiencies apply only to units with existing sleeves less than 16 inches (406 mm) high and less than 42 inches (1067
mm) wide.
8/6/10 780 CMR - Eighth Edition - 320
780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
115.00: continued
TABLE 507.2.1(4) WARM AIR FURNACES AND COMBINATION WARM AIR
FURNACES/AIR-CONDITIONING UNITS, WARM AIR DUCT FURNACES AND
UNIT HEATERS, EFFICIENCY REQUIREMENTS
Equipment Type
Size Category
(Input)
Subcategory or
Rating
Condition
Minimum
Efficiency Test Procedure
Warm air furnaces,
gas fired
< 225,000 Btu/h -90% AFUE
or 90% Et
DOE 10 CFR Part 430
or ANSI Z21.47
$ 225,000 Btu/h Maximum
capacity
90% Ec,
note 1.ANSI Z21.47
Warm air furnaces,
oil fired
< 225,000 Btu/h -85% AFUE
or 85% Et
DOE 10 CFR Part 430
or UL727
$ 225,000 Btu/h Maximum
capacity
85 % Et,
note 1.UL 727
Warm air duct furnaces,
gas fired All capacities Maximum
capacity 90% Ec ANSI Z83.8
Warm air unit heaters,
gas fired All capacities Maximum
capacity 90% Ec ANSI Z83.8
Warm air unit heaters,
oil fired All capacities Maximum
capacity 90% Ec UL 731
For SI: 1 British thermal unit per hour = 0.2931 W.
1. Units must also include an IID (intermittent ignition device), have jackets not exceeding 0.75% of the input rating,
and have either power venting or a flue damper. A vent damper is an acceptable alternative to a flue damper for those
furnaces where combustion air is drawn from the conditioned space.
Where there are two ratings, units not covered by the National Appliance Energy Conservation Act of 1987
(NAECA) (three-phase power or cooling capacity greater than or equal to 65,000 Btu/h [19 kW] shall comply with
either rating.
Et = Thermal efficiency
Ec = Combustion efficiency (100% less flue losses)
Efficient furnace fan: All fossil fuel furnaces in zones 3 to 8 shall have a furnace electricity ratio not greater than 2%
and shall include a manufacturer's designation of the furnace electricity ratio.
TABLE 507.2.1(5) BOILER, EFFICIENCY REQUIREMENTS
Equipment Type Size Category Minimum Efficiency
Gas Hot Water
< 300,000 Btu/h 90% Et
> 300,000 Btu/h and <
2.5 mBtu/h 89% Et
Gas Steam
< 300,000 Btu/h 89% Et
$ 300,000 Btu/h 89% Et
Oil
< 300,000 Btu/h 90% Et
$ 300,000 Btu/h 89% Et
Et = thermal efficiency
8/6/10 780 CMR - Eighth Edition - 321
780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
115.00: continued
TABLE 507.2.1(5) CHILLERS - EFFICIENCY REQUIREMENTS
Required Efficiency- Chillers
Optional Compliance Path -
Required Efficiency - Chillers
With VSD
Equipment Type Size Category
Full Load
(KW/ Ton)
IPLV
(KW/ Ton)
Full Load
(KW/Ton)
IPLV
(KW/ Ton)
Air Cooled w/
Condenser All #1.2 #1.0 N/A N/A
Air Cooled w/o
Condenser All #1.08 #1.08 N/A N/A
Water Cooled,
Reciprocating All #0.840 #0.630 N/A N/A
Water Cooled, Rotary
Screw and Scroll
< 90 tons #0.780 #0.600 N/A N/A
90 tons and
< 150 tons #0.730 #0.550 N/A N/A
150 tons and
< 300 tons #0.610 #0.510 N/A N/A
$300 tons #0.600 #0.490 N/A N/A
Water Cooled,
Centrifugal
< 150 tons #0.610 #0.620 #0.630 #0.400
150 tons and
< 300 tons #0.590 #0.560 #0.600 #0.400
300 tons and
< 600 tons #0.570 #0.510 #0.580 #0.400
$ 600 tons #0.550 #0.510 #0.550 #0.400
Notes.Compliance with full load efficiency numbers and IPLV numbers are both required.
Only Chillers with Variable Speed Drives(VSD) may use the optional compliance path here for chiller
efficiency.
TABLE 507.2.1(6) ABSORPTION CHILLERS - EFFICIENCY REQUIREMENTS
Equipment Type Required Efficiency Full Load COP (IPLV)
Air Cooled, Single Effect 0.60, but only allowed in
heat recovery applications
Water Cooled, Single Effect 0.70, but only allowed in
heat recovery applications
Double Effect - Direct Fired 1.0 (1.05)
Double Effect - Indirect Fired 1.20
507.2.2 Reduced Lighting Power Density. Whole Building Lighting Power Density (Watts/ft ) must be2
reduced by at least 10% from the values in Table 505.5.2, or as shown in Table 507.2.2.
507.2.2.1 Automatic Daylighting Controls. Automatic daylighting controls shall be installed in the
daylight zone and shall meet the requirements of 505.2.2.1.3.
8/6/10 780 CMR - Eighth Edition - 322
780 CMR: STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
115.00: continued
TABLE 507.2.2 REDUCED INTERIOR LIGHTING POWER ALLOWANCES
LIGHTING POWER DENSITY
Building Area Type Reduced whole building (W/ft )a 2
Automotive Facility 0.8
Convention Center 1.1
Court House 1.1
Dining: Bar Lounge/Leisure 1.2
Dining: Cafeteria/Fast Food 1.3
Dining: Family 1.4
Dormitory 0.9
Exercise Center 0.9
Fire Station 0.7
Gymnasium 1.0
Healthcare-Clinic 0.9
Hospital 1.1
Hotel 0.9
Library 1.2
Manufacturing Facility 1.2
Motel 0.9
Motion Picture Theater 1.1
Multi-Family 0.6
Museum 1.0
Office 0.8
Parking Garage 0.3
Penitentiary 0.9
Performing Arts Theater 1.4
Police 0.9
Post Office 1.0
Religious Building 1.2
Retail 1.2b
School/University 1.1
Sports Arena 1.0
Town Hall 1.0
Transportation 0.9
Warehouse 0.7
Workshop 1.3
a. See IECC 2009 Table 505.2 for notes and exception.
507.2.3 On-site Supply of Renewable Energy. The building or surrounding property shall incorporate
an on-site renewable energy system that supplies 3% or more of total building electrical loads. On-site
power generation using nonrenewable resources does not meet this requirement.
The jurisdiction shall be provided with an energy analysis that documents the renewable energy
contribution to the building or a calculation demonstrating that the on-site supply of renewable energy:
1. Is capable of providing at least 3% of the total energy load of the building, or
2. Has an installed maximum generating capacity equal to or greater than 0.50 watts per square foot
of usable floor space.
Chapter 6 Retain this chapter.
8/6/10 780 CMR - Eighth Edition - 323