Comfort takes on a whole new meaning with interest-free1,2 financing for energy-efficient home improvements.
Get 0% APR1,2 on up to $25,000 for energy-efficient home upgrades.
BENEFITS YOU'LL LOVE
So many ways to go green.
Upgrade your insulation, windows*, heat pumps and heat pump water heaters. You can even add batteries enrolled in ConnectedSolutions. Learn more about eligible upgrades.
Efficiency and affordability.
Interest-free1,2 financing is just the beginning. Rebates and discounts are also available for appliances, electric heating systems, and more. And there are savings you’ll see with lower energy costs.
- Get interest-free1,2 financing for energy-efficient home upgrades
- Loan amounts available up to $25,000 (depending on utility)
- For qualified owner-occupied residences
- Other requirements may apply for condo owners
Eligibility
Mass Save® HEAT Loans1 are available to customers of National Grid, Unitil, Cape Light Compact, Eversource and Liberty Utilities.
You must own a one-to-four-family residence located in Worcester County, obtain a Mass Save Home Energy Assessment if needed, and install qualified energy efficiency measures recommended by a Mass Save representative. Call Mass Save to determine if a Home Energy Assessment is needed for your project.

Requirements
- Confirm eligibility.
- Complete a no-cost Home Energy Assessment from an authorized Mass Save program vendor if required for your requested project.
- Find a participating contractor and obtain a signed proposal(s) on their official letterhead.
- Apply with Mass Save and provide the proposal along with any additional required documentation. If your project meets eligibility requirements, you will receive an Authorization Form.
- Complete your Authorization Form and send it to us to finalize your loan and obtain two-party checks.
- Complete the upgrades and apply for any available rebates. You can pay your contractor by signing over the bank check we provided to you.
- Complete a Verification inspection. Call 866-527-SAVE (7283) for details on completing this required verification.
Visit the Mass Save site for full requirement information.
Eligibility
MA DOER Z-Loans2 are available to residential customers that receive electric service from a Municipal Light Department (MLP) and heat their home with the electricity from an MLP, gas from a municipal gas company, or a delivered fuel (e.g. oil and propane) and are not eligible for a Mass Save HEAT Loan.
You must own a one-to-four-family residence located in Massachusetts, obtain a qualifying home energy assessment and install qualified energy efficiency measures recommended by the representative.

Requirements
- Confirm eligibility.
- Complete a home energy assessment with ENE - Sustainability or NextZero, depending on which MLP serves your community.
- Find a participating contractor and obtain a signed proposal(s) for upgrades.
- Apply with DOER and provide the proposal along with any additional required documentation. If your project meets eligibility requirements, you will receive an Authorization Form.
- Complete your Authorization Form and send it to us to finalize your loan and obtain two-party checks.
- Complete the upgrades. You can pay your contractor by signing over the bank check we provided to you.
- Finalize your loan by providing proof of installation.
Visit the DOER Z-Loan site for full requirement information.
How can I apply for HEAT Loan?
You can apply online in just a few minutes. Once an application is submitted, you’ll hear back from a CSB Representative in one to two business days. Or, if you prefer, you can come into one of our convenient branch locations and work with a Relationship Banker to fill out the application.
What is the interest rate for a HEAT Loan?
Get 0% APR1,2 on up to $25,000 for approved energy-efficient home upgrades.
1APR = Annual Percentage Rate. Monthly payment based on a loan amount of $12,500.00 at 0.00% APR and a repayment term of 84 months is $148.81. Offer applies to 1-4 family, owner-occupied, primary residences only. Not available for homes currently for sale or intended to be sold within 6 months of closing. Minimum loan amount $500.00. Maximum loan amount $25,000. All HEAT loans will be secured with a UCC-1 filing; $80.75 UCC filing fee will apply. Maximum closing costs of $80.75 will apply. All loans subject to meeting Mass Save Heat Loan Program guidelines. Heat Loan Program requires Home Energy Assessment from a Mass Save Energy Specialist; to schedule your assessment call 866.527.7283. Financing is subject to credit approval. Additional terms and conditions may apply. Some restrictions apply and offers are subject to change or cancellation. Visit MassSave.com for full details.
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.
*Must be in conjunction with completed weatherization recommendations.
2APR = Annual Percentage Rate. Monthly payment based on a loan amount of $12,500.00 at 0.00% APR and a repayment term of 60 months is $208.33. Residential customers are eligible if they receive electric service from a Municipal Light Plant (MLP) and heat their home with the electricity from an MLP, gas from a municipal gas company, or a delivered fuel (e.g. oil and propane) and are not eligible for Mass Save® programs. Prior to beginning any upgrade work, a qualifying home energy assessment must be completed, and only the measures identified in the assessment will be eligible for financing. Applicants will be required to submit documentation to confirm program eligibility, including the assessment report, an itemized contractor invoice, and confirmation of MLP electric service and home heating service. Offer applies to 1-4 family, owner-occupied, primary residences only. Not available for homes currently for sale or intended to be sold within 6 months of closing. Minimum loan amount $500.00. Maximum loan amount $25,000. All MA DOER Z-Loans will be secured with a UCC-1 filing; $80.75 UCC filing fee will apply. Maximum closing costs of $80.75 will apply. All loans subject to meeting MA DOER Z-Loan Program guidelines. Financing is subject to credit approval. Additional terms and conditions may apply. Some restrictions apply and offers are subject to change or cancellation. Visit MY Z-Loan for full details.
