The Massachusetts Stretch Code, established in 2009, is a voluntary energy code that municipalities can adopt to exceed state building energy standards by approximately 20-25%. It has served as a national model for local code advancement, promoting renewable energy integration, heat pump adoption, and superior building performance. Adoption has grown steadily, with over 100 Massachusetts communities participating.
HVAC Standards
The Stretch Code encourages or requires heat pump systems for heating and cooling, particularly for new construction and major renovations. Requirements include superior insulation, air sealing to blower door limits of 3 air changes per hour, and efficient ventilation. Ground source heat pumps receive incentive provisions. The code promotes renewable energy integration with solar and battery storage for peak shaving.
Market Effect
Municipalities adopting Massachusetts Stretch Code demonstrate commitment to energy efficiency and carbon reduction. HVAC contractors in Stretch Code communities must design systems with high-efficiency heat pumps and sophisticated controls. The standard increases construction costs 3-8% but qualifies for state rebates and incentive programs. Stretch Code adoption continues to expand, establishing higher baseline expectations for building performance in New England.