Massachusetts

Summary

Chapter 61 is a mandatory state developed residential code that meets or exceeds the requirements of the 2009 IECC. The stretch code is also a state developed code, which allows projects to voluntarily go beyond minimum standard and further reduce energy consumption by 20%. Energy performance criteria are outlined for residential buildings, addressing thermal envelope components and energy efficiency requirements for HVAC, hot water and lighting. The codes allow a prescriptive path or simulated reference-building calculation to show compliance. Compliance can also be achieved for the stretch code by meeting HERS rating scheme requirements.

The first building energy efficiency requirements for residential buildings in Massachusetts were adopted in 1975. In 2009, Massachusetts became the first state to adopt an above standard voluntary stretch code. The codes and surrounding policy systems incorporate a number of dynamic initiatives to improve energy efficiency, including mandatory air-tightness and duct tightness testing, renewable energy iniatives and special efficiency requirements for public buildings. Additionally, any jurisdiction seeking to be a “Green Community” must adopt the ‘stretch code’, with over 100 jurisdictions doing so as of December 2012.

General Information

Full Title of Code

Massachusetts Building Code For One- And Two-Family Dwellings, Chapter 61 + Massachusetts "Stretch Energy Code" Appendix 120AA (Voluntary) based on 2009 IECC, ASHRAE 90.1-2007, State-developed code, “Above and Beyond” Option for Green Communities

Year of Adoption

2009

Date of Enforcement

Wednesday, July 1, 2009

Authority in Charge

Massachusetts Board of Building Regulations and Standards.

Link

http://www.mass.gov/eopss/consumer-prot-and-bus-lic/license-type/csl/8th-edition...

Link to Relevant Web Page

http://www.mass.gov

Remit of Code

Geographical Coverage

Massachusetts

Code set at:

Regional/States Level

Coverage

Coverage of Building Code:

  • Residential buildings
    • One family
    • Multiple family buildings
      • The HERS rating calculates the total expected annual energy use, but converts that into an index based on an energy use per square foot comparison of a baseline house against the actual house.
  • Commercial buildings
    • Offices
    • Retail and wholesale
    • Hotels
    • Hospitals
  • Public buildings
    • Offices
    • Hospitals
    • Educational buildings

GBPN Climate Classification:

  • Heating Based
  • 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.

Type of Building Code

Type of Building Code:

  • Model code, frame or actual code:
    Any jurisdiction seeking to be a “Green Community” must adopt the ‘stretch code’, which incorporates a HERS based standard for residential buildings, roughly 20% more stringent than the standard State code.
  • Prescriptive Codes:
    Medium-sized commercial buildings, including residential buildings of 4 stories or more, but that are between 5,000 to 100,000 sf, have the option of meeting the large building performance standard, or using a simplified, prescriptive energy code.
  • Performance Codes for New Builds:
    All new residential buildings are required to meet performance requirements of the HERS rating scheme (65-70 points), based on a comparison with 2006 reference building.
  • Energy Declaration:
    Partially, HERS rating has to be supplied to the Town/city code official and is stored with the permit – in future it would be accessible, but it is not required to be displayed as a certificate. For the Commercial stretch code, for buildings over 100,000 sq ft the % better than baseline ASHRAE code is similarly required to be filed with the code official.
  • Model / reference Building:
    A performance based code requiring a Home Energy Rating System (HERS) maximum index score. 121 municipalities have adopted the HERS Index Score. A 2006 reference home is used. A performance-based code for large buildings is also available.

Energy Covered

Basis for Energy Requirements:

  • Overall performance frame:
    Maximum HERS ratings for Residential buildings or proven energy reduction compared to 2006 Massachusetts Energy Code for Commercial buildings.
  • Final Energy:
    Partially, the calculation determines 'Site Energy'.

Energy Uses and Functions Covered by the Code:

  • Heating
  • Cooling
  • Dehumidification
  • Ventilation
  • Airtightness
  • Thermal bridging
  • Hot water
  • Building parts (lifts, pumps etc)
  • Lighting
  • Design, position & orientation of building
  • Heat recovery
  • Passive solar
  • Natural ventilation
  • Daylighting requirements
  • Renewable Energy (solar, PV, others):
    No requirement for Residential buildings, but it is encouraged. Commercial buildings or surrounding properties shall incorporate an on-site renewable energy system that supplies 3% or more of total building electrical loads.

Enforcement

Enforcement Status of Code:

Mandatory

Type of Enforcement:

  • Local enforcement
  • Third party inspection
  • Post Occupancy control

On-site Inspections Occur

  • During construction
  • Post completion

Certification to Support Enforcement of Code:

  • Energy Performance Certificate support BC
  • Positive labeling for building beyond the minimum BC level
  • Inspection of boilers
  • Inspection of HVAC systems

Penalties for Non-compliance:

  • None
  • Refusal of permission to occupy

Measures Supporting Enforcement:

  • Commissioning requirements
  • Airtightness testing required prior to compliance
  • Mandatory Computer Modeling
  • Training of Inspectors
  • Text:
    The state Board of Building Regulations and Standards (BBRS) is required to revise the building code to the latest version of the IECC every three years.

Values for New Buildings

Residential Buildings - Stretch Code.

GBPN Climate Classification

Heating based

Coefficient for Comparison of Climate Zones

0.00

MeanMinMax
HDD (°C)3241--
CDD (°C)514--
U-Value (W/m²K)
Roof0.17Roof2-
Wall0.32Wall20.47
Floor0.19Floor2-
Window1.99Window2-
Others3.41--
Overall U-Value---
Window1Window2
G Value/SHGC--
Visible Transmission--
Percent--

Other Requirements Set for:

  • Pressure testing for ducting
  • Value for airtightness:
    <7 ACH50
  • Heat Recovery
  • Technical HVAC systems
  • Efficient Lighting

Commercial Buildings - All Other (Non Type R) - Stretch Code.

GBPN Climate Classification

Heating based

Coefficient for Comparison of Climate Zones

0.00

MeanMinMax
HDD (°C)324132413241
CDD (°C)514514514
U-Value (W/m²K)
Roof0.15Roof20.28
Wall0.29Wall20.45
Floor0.19Floor20.42
Window1.99Window2-
Others2.56--
Overall U-Value---
Window1Window2
G Value/SHGC0.4-
Visible Transmission--
Percent--

Other Requirements Set for:

  • Thermal bridge demands
  • Ventilation:
    Minimum efficiency requirements
  • Pressure testing for ducting
  • Heat Recovery
  • Technical HVAC systems
  • Efficient Lighting

Commercial Buildings - Type R Buildings - Stretch Code.

GBPN Climate Classification

Heating based

Coefficient for Comparison of Climate Zones

0.00

MeanMinMax
HDD (°C)324132413241
CDD (°C)514514514
U-Value (W/m²K)
Roof0.15Roof20.28
Wall0.29Wall20.4
Floor0.19Floor20.36
Window1.99Window2-
Others2.56--
Overall U-Value---
Window1Window2
G Value/SHGC0.4-
Visible Transmission--
Percent--

Other Requirements Set for:

  • Thermal bridge demands
  • Pressure testing for ducting
  • Heat Recovery
  • Technical HVAC systems
  • Efficient Lighting

Code History and Future Targets

General Process in Setting Requirements:

  • How far in advance are future targets set?:
    3 years
    The state Board of Building Regulations and Standards (BBRS) is required to revise the building code to the latest version of the IECC every three years. Public hearings are held each May and November to consider proposed modifications to the code. Most recent update effective January 1, 2010.
  • Stakeholders are informed of future targets far in advance

Zero Energy Targets:

  • All end uses are not included
  • There is not a realistic roadmap in place:
    MA has a definition and an ongoing advisory committee working to translate the roadmap into implementation.
  • National Target date for nZEB:
    There is no nZEB target as yet.
  • Special Requirements for public buildings:
    Overall energy consumption at state-owned and state-leased buildings should be reduced by 20% FY2012 and 35% by FY2020. All new construction and significant renovation projects over 20,000 square feet must meet the Massachusetts LEED Plus green building standard.

Current Defined Levels beyond Minimum Standard (present code)

1

Multiple set of data:

  • Levels beyond minimum:
    1
  • Year historic or aspirational codes (planned) :
    1900
  • Actual level of energy consumption in target
    • Relative target in percent:
      0
  • Primary Energy Performance Frame Residential:
    30%
    30% more efficient than base code.
  • Primary Energy Performance Frame Non-Residential :
    20%
    20% more efficient than base code.

Supporting Measures

Incentives/Rewards to Encourage People to go beyond Minimum Level?

There are incentives schemes and rewards available, incuding State Rebate programs, Utility rebate programs and Utility loan programs. Additionally, the HERS raters are subsidized rating. 2010 incentives: $750 - $1,250 per unit (approx Stretch Code level).

Involvement of Stakeholders in the Development of Codes

Code amendment cycles occur twice a year, as required by statute, and include a public hearing process. The next update to the stretch energy code will involve a roughly 6-9 month outreach period and a dozen public stakeholder meetings.

Level of Training Provided to Stakeholders Following Implementation of Code?

The Board of Building Regulations and Standards (BBRS) and the Department of Energy Resources (DOER) are sponsoring training on the building energy code, including the Stretch Code, at various locations around the state. The training is open to both building officials and other building professionals (e.g., builders & architects). Training is free for building officials, and counts toward the new BBRS requirement that building officials be trained in energy efficiency.

Supporting Certification Schemes

HERS Rating Scheme.

Codes Free to Access?

http://www.mass.gov/eopss/consumer-prot-and-bus-lic/license-type/csl/8th-edition-base-code.html

Evaluation

Compliance assessment