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National Grid
Massachusetts Gas
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To save up to 20 percent on heating and cooling costs, make sure all ceilings, roofs, exterior walls, and wall cavities are adequately insulated.

If you live in a 1-to-4 unit Massachusetts home, you may be eligible for an instant incentive for 75% off insulation, plus no-cost air sealing of leaks in drafty areas of your home. Please call 1-866-527-SAVE (7283) to schedule a no-cost Home Energy Assessment. Your National Grid Energy Specialist will come to your home, complete an attic-to-basement evaluation, and provide a custom home energy report outlining recommended energy efficiency improvements.

Common air leakage points to check and seal:

  • Around plumbing, electrical, and duct work in exterior walls.
  • Any chases open to spaces like an attic.
  • Gaps between interior and exterior walls and ceiling sheetrock.
  • Around sheetrock, including between interior and exterior walls and where sheetrock is sealed to the subfloor.
  • Openings around windows.
  • Floors, including cantilevered floors and band joist areas in floor systems.
  • Kneewalls in Cape-style homes.
  • Joints between existing buildings and additions or modular buildings.
  • Adding a reflective roof coating can also help improve energy efficiency.