Efficiency First

The Sponsors of Mass Save® are helping you prepare for a new heating system by increasing your home’s efficiency. Before upgrading your heating and cooling system, consider:

  • Air sealing: Ensure there are as few gaps as possible for indoor air to escape and outdoor air to get in. Air leakage can represent up to 40% of space-conditioning costs in a leaky building.
  • Insulation: Adding insulation slows heat transfer through the building envelope (i.e., walls, roof, floors); heat transfer is the leading cause of heat loss in the winter.
  • Ductwork upgrades: If your home utilizes a centralized heating or cooling unit with ducts outside of the conditioned space of the home (i.e., in an attic, basement, garage, or crawlspace), sealing and insulating the ducts can significantly improve the overall efficiency of your system by ensuring that more of the heated or cooled air gets delivered where it is needed.
  • Electrical panel upgrades: If your home utilizes fuses or no longer has room in the electric panel (all slots in panel occupied), upgrades may be needed to install a high efficiency electric system for your home. Consult a licensed and insured electrician as necessary.
  • Heat Pumps and Weatherization

    Heat pumps installed in a properly weatherized home can dramatically improve comfort. A tighter, more insulated home will not only save money on operating costs and reduce carbon emissions throughout the year - it may also allow you to buy smaller, less expensive equipment.


    ✓ Increased comfort by reducing drafts and uneven temperatures
    ✓ Reduced home energy consumption
    ✓ Reduced home's greenhouse gas emissions
    ✓ Reduced heating and cooling load

    If you plan to install heat pumps as your sole source of heating and cooling, completion of weatherization recommendations made during a Home Energy Assessment is a requirement for whole-home rebates.

    If your pre-existing heating system will remain in place to supplement your heat pump system, and you plan to pursue partial-home heat pump rebates, you maybe eligible for a $500 bonus when you complete weatherization recommendations prior to installing a heat pump system.

    Get Started:

    1. *Complete all weatherization recommendations made during an onsite or virtual Home Energy Assessment. To schedule, call 1-866-527-SAVE (7283)
    2. Contact a participating Mass Save Heat Pump Installer for a quote/proposal
    3. Consider HEAT loan financing and secure a loan
    4. Complete the installation and claim your rebate through the online rebate portal

    *Sufficient weatherization can be demonstrated by satisfying at least one of the following requirements: (A) home was built during or after 2000, (B) Home Energy Assessment report indicates less than $1,000 worth of weatherization recommended, or (C) weatherization recommendations made during or after 2012 have been completed. Heat pumps installed for whole-home heating and cooling that do not meet the weatherization requirement maybe eligible for partial-home rebate amounts.

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    Interested in 0% financing?

    Apply for a Mass Save HEAT Loan prior to installing your equipment. The Sponsors® of Mass Save are buying down interest rates to make energy efficiency more affordable for Massachusetts residents. With our HEAT Loan, you could qualify for a loan of up to $25,000 toward qualified energy efficient home improvements with terms up to seven years, depending on your Sponsor and the loan provider. Heat pumps must be installed by a contractor participating in the Mass Save Heat Pump Installer Network in order to be eligible for HEAT Loan financing.