If you are planning an energy-efficient home upgrade, Mass Save may help lower what you pay. The Massachusetts program is offered through participating electric and gas providers. Depending on the project, the savings may come as a Mass Save rebate after installation or as a discount when you buy.
This guide explains which path applies to your upgrade, what you need to qualify, and how to receive the savings.
Last reviewed: August 5, 2026
Mass Save savings do not all work the same way. Find your project below to see the type of benefit available and the first requirement to check.
| Home Project or Product | 2026 Benefit | How You Receive It | Main Requirement | Verify Current Terms |
| Air-source heat pump or mini-split | Whole-home: $2,650 per ton. Partial-home: $1,125 per ton. Both are capped at $8,500. | Submit a rebate after installation. | Use qualifying equipment and a Heat Pump Installer Network contractor. | Mass Save Air Source Heat Pumps page |
| Heat-pump water heater | $750 per qualifying unit or $1,500 per qualifying split system | Receive an instant discount or submit a rebate claim. | Install an eligible ENERGY STAR unit through a licensed plumber. | Mass Save Heat Pump Water Heaters page |
| Programmable or smart thermostat | Up to $25 for programmable models or $100 for smart models | Receive an instant discount or submit a rebate claim. | Purchase and install a qualifying new thermostat. | Mass Save Smart and Programmable Thermostats page |
| Connected Solutions thermostat enrollment | $50 enrollment incentive, or $100 on an R-2 rate, plus $20 annually per participating thermostat | Enroll through your participating electric Sponsor. | Use a supported thermostat with central cooling or a heat pump. | Mass Save thermostat enrollment page |
| Room air conditioner | $40 per qualifying unit | Receive an instant discount or submit a rebate claim. | Purchase an ENERGY STAR-certified model. | Mass Save Room Air Conditioners page |
| Refrigerator or freezer recycling | $75 payment and no-cost pickup | Schedule collection and receive payment after pickup. | The appliance must work and be 10 to 30 cubic feet. | Mass Save Refrigerator and Freezer Recycling page |
| Dehumidifier recycling | $30 payment | Add it to an appliance pickup or attend a turn-in event. | The dehumidifier must be working. | Mass Save Appliance Recycling page |
| Income-qualified appliance replacement | Potential no-cost replacement for qualifying appliances | Enroll through the income-qualified program. | Meet the current household income requirements. | Mass Save Income Eligible Programs page |
| Mass Save HEAT Loan | 0% financing up to $25,000 for up to seven years | Get Mass Save authorization, then apply with a participating lender. | Own the home and receive lender approval. | Mass Save HEAT Loan page |
Mass Save is offered through participating electric and gas providers, rather than as one statewide rebate with a single set of rules. Its sponsors are Berkshire Gas, Cape Light Compact, Eversource, Liberty Utilities, National Grid, and Unitil.
Search by ZIP code and check which company sponsors your electric or gas account.
Choose the specific rebate, discount, recycling payment, income-based program, or financing option you plan to use.
Check the requirements for the equipment, property, income level, contractor, and project dates.
Some offers require a Home Energy Assessment, equipment verification, or weatherization before the incentive can be approved. These steps do not apply to every offer.
Follow the offer’s rules for approved models and participating contractors. Keep the invoice and any documents needed for your claim.
Some discounts are applied when you buy. Other offers require an online or mail-in application after installation.
Living in Massachusetts does not automatically qualify you for every Mass Save offer. Eligibility starts with your utility account, then depends on the rules for the specific upgrade or program.
Your home generally needs a current residential electric or gas account with a Mass Save provider. Customers of municipal utilities may have fewer options, although some can qualify through a participating natural gas provider.
Some offers are tied to the electric account, while others require the gas account. Use the account connected to the property where the equipment will be installed.
Renters can qualify for certain product rebates, energy assessments, and ConnectedSolutions rewards. Improvements to the building may require the landlord’s approval or participation. The HEAT Loan is available only to homeowners.
Many residential equipment offers apply to homes with one to four units. Larger buildings may need to use a multifamily program, although some offers provide separate rules for properties with five or more units.
Eligible households may receive larger rebates or no-cost improvements through Mass Save’s income-based programs. These pathways require income verification and may follow a different process from a standard rebate claim.
The product must meet the published efficiency standard and appear on any required qualified product list. An offer may also limit how many rebates one account or property can receive.
Check the eligible dates before ordering equipment or starting work. The installation and rebate submission may have separate deadlines, so keep the invoice and proof of the completed project.
Mass Save covers several types of home energy upgrades, from heating systems to smaller household products. The offers below are among the most commonly searched, but they do not represent every rebate or discount service available.
A mini-split is a type of air-source heat pump, so it falls under the same Mass Save program. The rebate path depends on how the new system will heat the home.
Whole-home rebates apply when the heat pump becomes the home’s only heating and cooling system. Partial-home rebates allow an existing boiler or furnace to remain in use. The basic rebate covers projects such as replacing an older heat pump or adding a system to a space that was not previously heated or cooled.
Income-qualified households may have access to a separate, enhanced incentive.
Mass Save also has separate offers for air-to-water and ground-source systems. Air-to-water heat pumps transfer heat into a water-based heating system. Ground-source systems draw heat from the ground and follow their own rebate structure.
These projects have more technical equipment and installation rules than a general overview can cover clearly. Check the official page for the system you are considering before requesting quotes.
The current Mass Save water-heater offer applies to qualifying heat-pump models. It does not cover every type of water heater replacement.
You may receive the rebate when your installer buys the unit from a participating distributor. Instant savings are also available through participating retailers and the Mass Save Marketplace.
When an eligible unit is purchased elsewhere without the discount, the homeowner can submit a claim through the rebate portal or use the mail-in form. A licensed plumber must complete installation. Homeowners can also review water heater financing for costs not covered by the rebate.
Mass Save has two separate ways to save on thermostats. The first reduces the cost of buying a qualifying programmable or smart model. You can receive the savings through a rebate claim, an eligible retailer, or the Mass Save Marketplace.
ConnectedSolutions is a separate program for supported smart thermostats connected to central cooling or a heat pump. It provides an enrollment incentive, followed by an annual reward when the household continues participating in peak-demand events. These payments should not be combined and presented as one thermostat rebate.
The room air conditioner offer applies to qualifying window and portable units. It does not represent a general rebate for a new central air-conditioning system.
Eligible customers can claim the rebate after purchasing an ENERGY STAR-certified unit. Instant discounts may also be available through the Mass Save Marketplace or participating stores. The offer is limited to customers of participating electric providers and places a yearly limit on the number of units per account.
Mass Save treats appliance recycling and appliance replacement as different programs. The recycling offer pays customers to turn in an inefficient appliance that still works. Qualifying refrigerators and freezers include no-cost pickup. A working dehumidifier can be added to that collection.
Income-qualified households may instead receive a replacement when their current appliance is inefficient. This process begins with a Home Energy Assessment. The program may cover refrigerators, freezers, dehumidifiers, window air conditioners, or clothes washers.
A Home Energy Assessment is required for income-qualified home upgrades and certain projects financed through the HEAT Loan. Mass Save recommends an assessment for some other HEAT Loan projects, even when it is not mandatory.
An assessment is not ordinarily required for:
Weatherization improves insulation and seals areas where air escapes. Whole-home heat pump rebates require the property to meet Mass Save’s weatherization standard.
A new assessment may not be needed if the home already qualifies because of its age or previously completed improvements. Partial-home heat pumps follow different rules and may qualify for an additional incentive when recommended weatherization work is completed.
Heat pump rebates require a contractor in the Mass Save Heat Pump Installer Network. Homeowners may also request verification before installation to confirm that the proposed system meets the rebate requirements.
A licensed plumber must install heat pump water heaters. The plumber does not need to be part of the heat pump network. Thermostats and room air conditioners generally do not require professional installation.
Heat pump rebates use a post-installation claim. Smaller products may use either an instant discount or a claim after purchase. HEAT Loan projects require Mass Save authorization before work begins.
The application process depends on whether the savings are applied at purchase, claimed afterward, or provided through a separate program.
For an in-store discount, first confirm your eligibility through the Mass Save instant rebates portal. Enter your utility account information to receive a code, then present it at the register when you buy the qualifying product.
The Mass Save Marketplace applies eligible discounts during an online purchase. New users must connect their electric or gas account before they can see the available savings.
Submit a rebate claim when you purchased eligible equipment without receiving an instant discount. Most applicable offers let you apply through the online rebate portal or mail a completed form with the supporting documents.
The exact documents depend on the offer, but you may need:
Appliance recycling follows a separate process, and the offer applies only to certain working appliances. Eligible refrigerators and freezers are collected through a scheduled pickup, while dehumidifiers may be added to the pickup or taken to a participating event. The payment is processed after the appliance is accepted.
Income-qualified upgrades also begin outside the standard rebate portal. After confirming eligibility, the household completes a no-cost Home Energy Assessment. Mass Save then identifies qualifying improvements and arranges any approved replacements.
Use the Mass Save rebate portal to manage eligible online claims.
These timelines apply to standard rebate claims. Instant discounts are applied at purchase, while appliance-recycling payments follow a separate process and may take six to eight weeks after pickup.
Delays often come from missing information. A rejection usually means the claim does not meet a program rule.
Common problems include:
Use available incentives in this order to reduce the amount left to pay.
2026 tax note: Do not include the former federal Section 25C credit in your estimate. It is unavailable for property placed in service after December 31, 2025.
A contractor can be licensed without participating in Mass Save. Program participation also does not guarantee the quality of their work. Look at credentials, relevant experience, and program status separately.
Online rebate claims usually take six to eight weeks to process. Mailed applications may take longer. Check the portal for updates, and contact the rebate program if more than eight weeks have passed since you submitted a complete claim.
Yes. A mini-split is an air-source heat pump and may qualify under the same rebate program. The amount depends on whether the system heats the whole home, part of the home, or serves another eligible purpose. The equipment and installation must meet the current program rules.
Sometimes. Each offer has its own rules for combining savings. A manufacturer promotion or approved discount may be allowed, while another utility incentive may not be. For example, Mass Save does not allow its heat pump water heater rebate to be combined with another utility offer for the same equipment.
Equipment must meet the efficiency standard for the offer and may need to appear on an approved product list. Qualification can also depend on the exact model and installation date. Check the current offer page before buying, since eligible products, purchase windows, and submission deadlines can change.
Yes. Renters may qualify for product rebates, energy assessments, appliance programs, and ConnectedSolutions rewards. Work that changes the building may require the landlord’s approval or participation. Eligibility also depends on the property and utility account, so renters should review the terms for the specific offer.
Read the notice or check the portal to find the reason for the decision. If documents are missing, the program may request them before continuing. A claim may remain ineligible when the equipment, installer, account, or timing does not meet the offer rules. Contact the rebate program if the explanation is unclear.
