0% Interest Financing

Take advantage of 0% interest financing to pay for energy efficiency upgrades while saving energy.
A person using a calculator
The Mass Save HEAT Loan offers 0% financing opportunities for eligible energy-efficient upgrades.

Energy efficiency is a home investment that pays off now, and for years to come, through lower energy use. The Sponsors of Mass Save are here to help make your home energy projects more affordable.

Financing is available for a variety of energy-efficient upgrades—including insulation, heat pump installations, batteries, and more.

For detailed information about the HEAT Loan, reference our HEAT Loan Guide.

In alignment with the commonwealth’s climate policy and goals, the Sponsors of Mass Save are discontinuing rebates and financing for equipment powered by natural gas, oil and propane. Eligible natural gas, oil and propane heating and water heating equipment must be purchased and installed by August 31, 2024, and all necessary documentation submitted by September 30, 2024, to receive a rebate. The deadline to request the HEAT Loan Authorization Letter for eligible natural gas, oil or propane equipment was April 30, 2024.

Through the Mass Save HEAT Loan Program, you may be eligible to receive 0% financing up to $25,000 for qualifying energy-efficiency upgrades. If you are installing heat pump(s), you may qualify for 0% financing up to $50,000 for qualifying energy-efficiency upgrades. Please reference details within the chart below as well as the HEAT Loan Packet for complete eligibility details.

0% Financing
Up to $25,000 total
  • Weatherization*
  • Pre-weatherization barriers*
  • Condensing boilers and furnaces**
  • Water heaters (oil, propane, gas)**
  • ENERGY STAR certified replacement windows***
  • Residential batteries enrolled in ConnectedSolutions
Up to $50,000 total
  • Heat pump projects
  • Heat pump water heaters

* Up to $50,000 when installed in conjunction with a program eligible heat pump project.
**HEAT Loan Authorization Letter must have been previously requested by April 30, 2024, in order to qualify.
***Must be in conjunction with completed weatherization recommendations.
Note: The maximum loan amount is over the lifetime of a customer’s energy efficiency upgrades. Eligible energy efficiency measures can be financed until the maximum loan amount is reached.

  1. Confirm Eligibility

    View the Eligibility Tab to confirm the eligible requirements.

  2. Find a Participating Contractor

    Choose a participating contractor for your energy efficiency project. Make sure to get a signed proposal from the contractor on their official letterhead. We recommend getting multiple quotes from licensed and insured contractors before making your choice.

  3. Complete Your Loan Application

    Enter your zip code and heating fuel type below to start your application. You will need to include your signed contractor proposal and any additional required documentation. If your project meets the eligibility requirements, you will receive an Authorization Form.

Enter your zip code and heating fuel type to find your HEAT Loan Administrator and start your application.
Zip Code
Primary Heating Fuel

No Match Found


  1. Secure Your Loan 

    Submit your completed Authorization Form to a selected participating lender. If approved, the lender will provide you with a two-party check made payable to you and your contractor. View the Participating Lenders Tab for a list of lenders who are offering loans up to $50,000.

  2. Complete Upgrades & Apply for Rebate

    Once your energy efficiency project is complete, you can pay your contractor by signing over the bank check from the lender. Visit MassSave.com/savings to apply for any available rebates.

  3. Complete a Verification Inspection

    Call 866-527-SAVE (7283) for details on completing this required verification.
    For more information, please click here.

  • The HEAT Loan is available to qualified customers participating in the Mass Save Program
  • Loan applicant must be the homeowner
  • Residents must have a current residential electric account
  • Municipal electric customers can take advantage of the HEAT Loan offer if their home is heated with natural gas, provided by a Mass Save Sponsor
  • Financing is only available for qualifying energy-efficient improvements outlined within the HEAT Loan Guide
  • Financing is contingent upon loan approval from a participating lender

To view a complete list of participating lenders, click here. Lenders who are offering loans up to $50,000 are listed below.

Lenders who are offering loans up to $50,000 are listed below.
Lender Owner Occupied $50k Loan Non-Owner Occupied $50k Loan
Align Credit Union Yes No
Alpha Credit Union Yes No
Athol Savings Bank Yes No
Bank Five Yes Yes
Berkshire Bank Yes Yes
BayCoast Bank Yes Yes
Boston Firefighters Credit Union Yes Yes
Cambridge Teachers Federal Credit Union Yes Yes
Clinton Savings Bank Yes Yes
Eastern Bank Yes Yes
Energy Credit Union Yes No
Franklin First Federal Credit Union Yes No
Hanscom Federal Credit Union Yes No
Homefield Credit Union Yes Yes
Lexington MA Federal Credit Union Yes Yes
Main Street Bank Yes No
Martha's Vineyard Savings Bank Yes No
Massachusetts Family Credit Union Yes No
Mechanics Cooperative Bank Yes Yes
Members Plus Credit Union Yes Yes
Metro Credit Union Yes Yes
Mill Cities Community Investments Yes Yes
Mills42 FCUs Yes No
MutualOne Bank Yes Yes
Naveo Credit Union Yes Yes
New Bedford Credit Union Yes Yes
Pioneer Valley Federal Credit Union No No
Plymouth County Teachers Federal Credit Union Yes No
Shrewsbury Federal Credit Union Yes No
St. Anthony of New Bedford Federal Credit Union Yes Yes
Tremont Credit Union Yes No
UMassFive College Federal Credit Union Yes Yes
Worcester Community Housing Resources, Inc Yes Yes
A person configuring an integrated control thermostat

Not Sure Which Heating System Is Right for You?

Start your home energy efficiency journey with a no-cost virtual or in-person Home Energy Assessment. An Energy Specialist will seek out inefficiencies, recommend upgrades, and help you access available rebates and incentives.