Heat Pump Rebates for Your Home
If you are looking for a convenient way to heat and cool your home, consider a heat pump. Heat pumps can efficiently heat your home in the winter and cool it in the summer—while lowering your household’s carbon emissions.
CMLP and the Sponsors of Mass Save® are making the purchase and installation of energy-efficient heat pumps affordable for Concord residents. Your primary heating fuel determines which agency provides you with heat pump rebates.
Oil, Electric and Propane Heating ↓ See below to learn more and apply. |
Whole-Home Rebate: CMLP offers rebates up to $15,000 to customers who install heat pumps for whole-home heating and cooling in existing homes. Customers must submit a completed and signed Whole Home Heat Pump Verification Form as part of their rebate claim. CMLP highly recommends submission of the Optional Pre-Approval Form to confirm whole home rebate eligibility before installation. See the "Eligibility Criteria for All Heat Pump Projects" section below for link to form.
Partial Home/Supplemental Rebate: CMLP offers rebates based on equipment size (tons of cooling capacity) to customers who install heat pumps to supplement an existing heating system or in just a small section of their existing home. To quality for rebates on supplemental (or partial-home) heat pumps, integrated controls must be installed in homes with oil or propane back-up.
Outbuilding Rebate: CMLP offers rebates based on equipment size (tons of cooling capacity) to customers who install heat pumps in an outbuilding on their property.
For whole-home, partial home and outbuilding rebates, please refer to the eligibility sections below for further requirements, including post-installation quality assurance requirements.
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CMLP recommends getting 3 quotes for any significant work you have done on your house. At no cost to you, ask our trained heating/cooling coaches for help comparing quotes, understanding the alternatives being offered, and asking installers the right follow-up questions. The coaching service is supported by CMLP funds. CMLP's coaches have no affiliations with private businesses and can offer impartial information. Coaches help you become better informed, so that you can confidently make your own decision about choosing an installer. Further, Concord homeowners who work with CMLP's heating/cooling coaches to plan heat pump projects spend less on their installations - even before rebates up to $10,000 - than homeowners who don't work with a coach.
We do not have a list of pre-screened heat pump contractors, but you can find contractors through the following avenues:
- Talk with friends & neighbors to see who they’ve worked with and recommend.
- Look at heat pump installer ratings with the Better Business Bureau, through the public library’s Consumer’s Checkbook account (checkbook.org/library/Concord-Public-Library/login/), or via online rating apps.
Here is a list of companies that have completed heat pump installations receiving CMLP rebates since January 1, 2021. Installers may have completed additional installations in Concord that received Mass Save rebates, because the heat pump displaced natural gas heating. CMLP does not endorse or pre-qualify these installers in any way.
You are not required to work with a contractor on this list to install a heat pump in Concord or receive a CMLP rebate.
Company Name Number of
Air-Source Heat Pump Projects Receiving CMLP Rebates Since 2021Number of
Ground-Source Heat Pump Projects Receiving CMLP Rebates Since 2021128 Plumbing, Heating, Cooling & Electric 2 A. Fagundes Plumbing & Heating 32 AC Master 2Ace Energy Services 3 Acushnet Air Systems & ABRN Development 1 Addario's Services 2 Advanced Mechanical Systems 25 Air Solutions 4 Airise HVAC Design Inc 1 Basnett HVAC 37 Beaudoin HVAC 1Bill Wenzel HVAC 2 BJ Doyle 1 Boston Sila Heating, Cooling, Electric 2 Boucher Energy Systems 4 1 Burns Mechanical Corporation 2 Casey HVAC 1 Central Air Systems 3 Central Cooling & Heating 4 Chaves Heating and AC 4 Chris Milot Plumbing & Heating 1 Complete Comfort Systems (DBA Climate Zone) 2 Concord Heating & Air Conditioning 5 CoolAir Company 1 Cooling Unlimited 1 D & D Heating & Air 1Dandelion Energy 1Dauplaise Mechanical Inc 1 Denommee Heating, Cooling & Plumbing 15 DW Lammi Plumbing & Heating 1 Earth Tech Systems 12 Endless Energy 8 EnergySmart Alternatives 2 Eric C. Foster Plumbing Heating Cooling 3 Fran-J.R. 1 Frank's Heating Service 1 G3 HVAC 1 Gervais Mechanical Services 1 Heffernan Build & Remodel 1 Heritage Home Services 3 Hillco Heating and Cooling 2 HomeWorks Energy 2 HR HVAC 2 J Griffin Heating & Plumbing 1 J&J Heating & Air Conditioning 1 Jay Moody HVAC 2 JB Heating 1 Jody Mcgill 1 Joe Peters 1 KASA HVAC Services 1 KCR Inc 2 Landry Mechanical 1 LeBlanc Mechanical 1 MacFarlane Energy 1 Mainstay Mechanical Services 1 Massachusetts Geothermal 1 Miller Mechanical 1 MillTown Plumbing & Heating 5 Muirfield Mechanical Services 22 Nashoba Air & Boilerworks 10 Nashoba Heating & Cooling 1 Needham Mechanical 1 Net Zero Heating & Air Conditioning 11 NETR Inc. 10 New England Ductless 5 New Era Plumbing & HVAC 3 Obie Comfort Solutions 5 Papalia Home Services 20 Pespisa Plumbing & Heating 5 Pinnacle HVAC 2 Refresh Services LLC 1 RER Fuel Service 12 ReVision Energy 1 Rodenhiser Home Services 5 Saba HVAC Services 2 Southern New England HVAC 1 Suburban HVAC 3 SumZero Energy Systems 3 TAG Heating & Cooling 2 TJ's Heating and Air Conditioning 2 Total Comfort Mechanical 3 Victoria Services 1 Wattson Home Solutions/Energy Monster 1 Wilson Brothers 32 1 W's HVACR Service 1 10/6/25
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CMLP Rebates
Pre-Existing Primary Fuel Type Equipment Type Rebate Type Rebate Amount Special Requirements Equipment Eligibility Criteria Oil, Propane, Electric Resistance, Heat Pumps, or ETS Ground Source
Heat Pumps (GSHPs)Partial Home $2,000 per ton* up to $15,000
per home per yearMust be on both ENERGY STAR and AHRI-Certified Lists Partial Home Replacement without Well Drilling $2,000 per ton* up to $10,000
per home per yearWhole Home $15,000 per home See Note below** Whole Home Replacement without Well Drilling $10,000 per home Air Source
Heat Pumps (ASHPs)Partial Home $1,250 per ton* up to $10,000 per home per year Integrated controls required if supplemental heating system uses oil or propane. Refer to Mass Save Integrated Controls Product List at MassSave.com/ICPQL Mass Save Heat Pump Qualified Product List at MassSave.com/HPQPL Whole Home $3,000 per ton* up to $10,000 per home See Note below** Outbuilding $1,250 per ton* up to $2,500 per outbuilding per year Oil, Propane, Heat Pumps, or ETS Air to Water
Heat Pumps (AWHPs)Whole Home $3,000 per ton* up to $10,000 per home See Note below** * Tons are calculated based on AHRI cooling capacity divided by 12,000 BTUs.
**Heat pumps must be new and capable of being the sole source of heating for the residence. The definition of "sole source" can be found in the "Additional Requirements for Whole Home Heat Pump Projects" section, and includes sizing parameters and some restrictions on the use of supplemental and emergency heat. Whole-home heat pump verification form must be signed and submitted with rebate application.
Rebate Application Deadline:
CMLP's 90-day rebate application window begins on the later of the Concord Building Department's electrical inspection approval date or sheet metal inspection approval date (applicable if the project requires sheet metal ducting work that goes beyond minor repairs). Projects for which CMLP does not receive a rebate application within the 90-day window are not eligible for a rebate.
Rebate Caps:
Rebate not to exceed project cost.
A customer is eligible for the following maximum rebate per service address per calendar year for equipment installed in that calendar year. A service address is the physical address at which electricity is provided. The equipment installation date is the later of the Concord Building Department's electrical inspection approval date or sheet metal inspection approval date (applicable if the project requires sheet metal ducting work that goes beyond minor repairs).
- $10,000 in air source heat pump or air-to-water heat pump rebates or
- $15,000 in ground source heat pump rebates or
- $15,000 in rebates if a combination of air source and ground source heat pumps are installed
If a property is sold, the new account holder’s cap resets at $10,000 (ASHP or AWHP) or $15,000 (GSHP) per service address per calendar year, regardless of rebates awarded to previous account holders.
Rebate cannot be combined with a National Grid/Mass Save rebate for the same equipment.
Rebate Eligibility for Multi-Unit Properties
Multi-unit properties include:
- residential condominium complexes
- single family homes with informal apartments
- 2 or 3 family homes
- Multiple houses on one parcel
- Properties with outbuildings, where heat pump is to be installed in the outbuilding
- Apartment buildings with 4 or more units
- Transient or non-transient group quarters
The way in which CMLP applies its heat pump rebate policy to different types of multi-unit properties is based upon:- Property type classification codes known as “Use Codes,” that are displayed in the “Land Use” section of each property record in the Concord Assessor’s database.
- Electric service addresses in CMLP’s billing system.
Click here to see how CMLP’s heat pump rebate policies apply to each of the multi-unit property types listed above.
Rebate Eligibility for New Construction
See the next section: "Eligibility Criteria for All Heat Pump Projects," for information on rebate eligibility for new construction.
Rebate Eligibility for Ground Source Heat Pumps that Share a Geothermal Well
A ground source heat pump sharing a geothermal well with another ground source heat pump serving a different building is not eligible for a rebate from CMLP.
State Incentives
- New England Heat Pump Accelerator Pass-Through Incentives
- Concord residents in existing single family or two- to four-unit homes are eligible for pass-though incentives offered by the New England Heat Pump Accelerator, if your heat pump installer provides your name, address, phone number and email to a participating distributor upon purchase of the heat pump equipment for your home. The incentive is $650 per outdoor condenser, up to 2 condensers per address. The distributor discounts the sale price by the amount of the incentive, and the installer passes the incentive through to you as a credit on your invoice.
- Look for the New England Heat Pump Accelerator Pass-Through Incentive on quotes you receive from potential installers, and on the invoice you receive from the installer you select. If you don't see the incentive line item, ask the installer about it. Learn more about the incentive here. You are eligible for this incentive in addition to CMLP's heat pump rebate.
- Households that switch from natural gas heating to heat pump heating are eligible for Mass Save's heat pump rebate (but not CMLP's rebate) and the New England Heat Pump Accelerator Pass-Through Incentive.
- The incentive is currently available for air-source heat pumps, and should also become available for ground-source heat pumps in June 2026.
- Massachusetts Alternative Energy Credits (AECs)
- For whole home heat pumps (where the home is heated exclusively with heat pumps). AECs are bought and sold, so their price fluctuates. The state suggests finding a broker who can procure and sell your credits for a fee. Click here for more information on AECs and brokers.
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Applicable Building Stock
CMLP’s heat pump rebates are available for heat pumps installed in existing buildings, and/or newly constructed additions to existing buildings. They are not available for heat pumps installed before the date a Permanent Certificate of Occupancy was issued for a newly constructed home or before the date a building inspection approval was issued for a newly constructed outbuilding.
Equipment must be used to supplement or replace oil, propane, or electric baseboard (resistance) heating systems or pre-existing heat pumps that functioned as the existing primary heating system. Households whose primary heating fuel is/was natural gas are not eligible for CMLP’s heat pump rebates, but may apply for similar rebates through Mass Save.
Home Energy Assessment Requirement
If a home was built before 2008, a no-cost home energy assessment within the last three years or scheduled within six months after project completion is required. Outbuildings listed in the “Outbuildings” section of the property record in the Town of Concord’s online assessment database are exempt from the home energy assessment requirement. A completed Energy Saver Home Loan Program decarbonization plan is an acceptable substitute for a completed home energy assessment. If a home in which a heat pump is being installed is also being renovated such that the structure is intact, but some or all wall studs are exposed, the following requirements apply:
- When a HERS rating is required by building code for the home being renovated, a final HERS rating report substitutes for a home energy assessment.
- If the building code does not call for a HERS rating for the home being renovated, a home energy assessment is required.
Completed Home Energy Assessment: If you believe you had an assessment in the last three years through CMLP, but do not know the date, contact Energy New England, CMLP’s assessment provider, at 1-888-772-4242 or hea@ene.org for assistance.
Scheduling a No-Cost Home Energy Assessment: Visit our Home Energy Assessments webpage for instructions on scheduling an assessment.
Decarbonization Plan: Households participating in the Energy Saver Home Loan Program receive a decarbonization plan subsequent to an assessment of their home by an Energy Service Provider. The decarbonization plan can be uploaded with the heat pump rebate application to fulfill the home energy assessment requirement.
Final HERS Rating Report: When a final HERS rating report substitutes for a home energy assessment, enter the date of the final HERS rating report in the heat pump rebate application.
CMLP strongly recommends that priority weatherization recommendations from the home energy assessment or decarbonization plan be implemented before, or in coordination with, the installation of the heat pump. A tight, well-insulated home optimizes heat pump performance, and may allow for a smaller heat pump to be installed, saving you money upfront and on your monthly utility bills. CMLP’s weatherization rebates help you increase your home’s efficiency and prepare for a new heating system.
Optional Project Pre-Approval
Homeowners and contractors who wish to verify rebate eligibility prior to system installation may opt into submitting an optional rebate pre-approval form. CMLP strongly suggests taking advantage of this opportunity to verify a project's rebate eligibility, preferably before a contract is signed, and especially if the customer is expecting a whole home heat pump rebate. Contractors can submit the optional pre-approval form online with details on the proposed equipment at the links below for air-source or for ground-source heat pump projects. CMLP will review the project to verify whether it qualifies for CMLP's rebates, and whether a whole home or a partial home heat pump rebate applies. Both the customer and contractor will receive an email confirmation once pre-approved. If equipment changes from pre-approval to installation, CMLP cannot guarantee rebate eligibility.
Air-Source Heat PumpsGround-Source heat PumpsTown Building Department Permit and Inspection Requirements
The project electrician must apply for a Town electrical permit before work begins and schedule an electrical inspection after the work is done. CMLP will not award rebates until projects have passed an electrical inspection by Concord's Building Department.
If the project requires sheet metal ducting work that goes beyond minor repairs, a sheet metal permit must be obtained for the project. Examples of projects that require a sheet metal permit include installation of new ducting or replacement, significant repairs or changes to existing ducting. The Town of Concord's inspector must have inspected and approved the sheet metal work.
CMLP will verify that the project has passed the necessary inspections. Find out more details about permits and inspections in the Quality Assurance section on this page. The Building Department's contact information and hours are here.
Town of Concord Board of Health Drilling Permits
Ground-source heat pump installers must apply for a drilling permit from the Town of Concord Board of Health before drilling begins. The permit application allows the Board of Health to verify that the wells are set back an appropriate distance from existing sewer and water lines. Permits can be requested via the Town's online permitting system. Contact information and hours for the Board of Health are here. CMLP will verify the date on which the drilling permit is issued.
Do-It-Yourself Heat Pump Installations
Do-it-yourself (DIY) heat pump installations are eligible for rebates under the following conditions:
-- A licensed electrician obtains an electrical permit and does the wiring. The installation must pass a Concord Building Department electrical inspection.
-- If the project involves sheet metal work beyond minor repairs, a tradesperson qualified to obtain a sheet metal permit must do so. The sheet metal work must pass a Concord Building Department inspection.
-- When applicable, refrigerant lines must be charged, sealed, and tested by a licensed professional to adhere to EPA regulations (some self-install systems are pre-charged and pre-sealed). If an existing HVAC system is being decommissioned, existing refrigerant must be properly recaptured.
-- The rebate cannot exceed the cost of the project, which is documented by invoices and/or receipts. Therefore DIY labor does not count towards the cost of the project.
Rebate Application Deadline:
CMLP's 90-day rebate application window begins on the later of the Concord Building Department's electrical inspection approval date or sheet metal inspection approval date (applicable if the project requires sheet metal ducting work that goes beyond minor repairs). Projects for which CMLP does not receive a rebate application within the 90-day window are not eligible for a rebate.
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CMLP highly recommends submission of the Optional Pre-Approval Form to confirm whole home rebate eligibility before an installation contract is signed. See the "Eligibility Criteria for All Heat Pump Projects" section above for links to pre-approval forms for air-source heat pump projects and for ground-source heat pumps projects.
In addition to the requirements for all heat pump projects, the following are requirements for CMLP's whole home heat pump rebate:
- Heat pumps must be new and sized to be capable of being the sole source of heating in the home, defined as the living area in the Town of Concord's online property assessment database. A Manual J calculation of the total heat load at an 8°F outdoor design temperature, per ASHRAE 2021 Design Conditions, is required. Heat pump must be sized to meet 90 - 120% of the total heat load. Each condenser must be able to heat its zone down to 8°F. The heating capacity of air-source heat pumps at an 8°F outdoor design temperature is calculated based on a linear estimate using the M1 heating capacity ratings at 17°F and 5°F in the AHRI Directory of Certified Product Performance. The heating capacity of ground-source heat pumps is based on a software design report provided by the installer, showing the system's heating capacity at the incoming water temperature.
- CMLP reserves the right to issue rebates for heat pumps sized to meet more than 120% of the total heating load, at its discretion.
- Homes may use supplemental electric heat (electric resistance units/baseboards, existing heat pumps and/or ETS) if the new heat pump system is sized to meet 90% - 120% of the home's total heat load. Auxiliary electric resistance strips built into the heat pump itself or non-electric systems are allowed for emergency heat (see below) but not supplemental heat. If a heat pump project utilizes supplemental electric heat in rooms other than bathrooms, the project is eligible for a whole home rebate only if the supplemental electric heat meets no more than 10% of the home's total heat load and the new heat pump is sized to meet 90% - 120% of the home's total heat load.
- Homes may maintain emergency heating capacity from:
- electricity (electric resistance strips within the heat pump(s), electric resistance units/baseboards or ETS equipment)
- existing or new wood/pellet stoves, boilers or furnaces
- existing or new fossil fuel (fuel oil or propane) boilers or furnaces
An emergency is:
- heat pump maintenance/repair downtime or
- the heat pump is not able to heat the home during an extreme weather event.
- Homes may use a pre-existing or new fossil fuel heating system for domestic hot water.
- A customer and their installer must sign the Whole Home Verification Form and submit it with the heat pump rebate application.
- The installer must submit a Manual J heat load calculation to CMLP with the optional pre-approval form that is in the "Eligibility Criteria for All Heat Pump Projects" section, or with the heat pump rebate application in the "How to Apply" section, if rebate pre-approval was not requested.
- Because the heat pump system for which the rebate is being sought must be sized to be capable of being the sole source of heat in the home:
- a customer installing more heat pumps to supplement existing heat pumps is eligible for a partial home heat pump rebate, not a whole home heat pump rebate, if the new heat pumps are sized to meet less than 90% of the heating load. If a heat pump project utilizes supplemental electric heat in rooms other than bathrooms, the project is eligible for a whole home rebate only if the supplemental electric heat meets no more than 10% of the home's total heat load and the new heat pump is sized to meet 90% - 120% of the home's total heat load.
- a heat pump sized for whole home AC but inadequate for whole home heating is eligible for a partial home heat pump rebate but not for a whole home heat pump rebate.
- A customer installing a new heat pump system to replace existing heat pumps is eligible for a whole home heat pump rebate if the new heat pump system is sized to be capable of being the sole source of heating in the home, as defined above.
Whole Home Rebate Eligibility for Multi-Unit Properties
Multi-unit properties include:
- residential condominium complexes
- single family homes with informal apartments
- 2 or 3 family homes
- Multiple houses on one parcel
- Properties with outbuildings, where heat pump is to be installed in the outbuilding
- Apartment buildings with 4 or more units
- Transient or non-transient group quarters
The way in which CMLP applies its whole home heat pump rebate policy to different types of multi-unit properties is based upon:- Property type classification codes known as “Use Codes,” that are displayed in the “Land Use” section of each property record in the Concord Assessor’s database.
- Electric service addresses in CMLP’s billing system.
Click here to see how CMLP’s whole home heat pump rebate policies apply to each of the multi-unit property types listed above.
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In addition to the requirements for all heat pump projects:
- new heat pumps sized to meet less than 90% of the total home heating load at an 8F outdoor design temperature, per ASHRAE 2021 Design Conditions, are eligible for partial home heat pump rebates if they are supplementing or replacing oil, propane, electric resistance, ETS or existing heat pumps, or if they are replacing natural gas as a secondary source of heating.
- integrated controls must be installed in homes with oil or propane backup to qualify for rebates on partial-home air-source or air-to-water heat pumps.
- Integrated controls are not required if the backup heating system is heat pumps, electric resistance or ETS.
- Integrated controls are not required if the heat pump meets 100% of the heating needs for a distinct zone in a home, meaning that there is no other heating equipment serving that zone with which to integrate the heat pump.
- Integrated controls are not required for partial-home ground-source heat pumps.
- integrated controls must be set at or below these maximum switchover temperatures:
Pre-Existing Heating Fuel Maximum Switch-Over Temperature Propane ≤ 15°F Fuel Oil or Natural Gas ≤ 30°F - A heat pump sized for whole home AC, but inadequate for whole home heating is eligible for a partial-home heat pump rebate. Integrated controls are required for air-source or air-to-water heat pumps, when the primary heating system uses fossil fuels. Installers must design the system to be able to meet the home's heating needs at the defined maximum switch-over temperature above, so that the new heat pump system is heating-ready.
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The heat pump rebate application form found in the "How to Apply" section requires the installer to provide information that will allow CMLP to evaluate the quality of the installation. The rebate application form requires Concord Building Department inspection approval dates, drilling permit date if needed, equipment and project information for rebate eligibility review, and requires the installer to confirm that installation best practices were followed. CMLP will review the completed form, follow up with the contractor regarding any deficiencies and conduct an on-site inspection if necessary.
Town of Concord Building Department Permits and Inspections
The project's electrician must obtain a Town electrical permit and schedule an electrical inspection. CMLP will not award rebates until projects have passed electrical inspection by Concord's Building Department. If sheet metal duct work beyond minor repairs is also part of your installation, your installer must also obtain a sheet metal permit. Contact information and hours for the Building Department are here.
Getting an Electrical Permit
The permit should be obtained before work begins. Concord has online permitting, so the electrician does not have to go into the Building Department office in person to obtain a permit. The electrician can upload their liability insurance certificate and license and can pay online.
Getting an Electrical Inspection
Electrical inspections are done on weekdays and can usually be completed within 5 to 7 days of the request. The homeowner cannot schedule the inspection. The electrician schedules it by calling the Electrical Inspector at 978-318-3235 between 8am and 9am Monday through Friday with the permit number and the desired inspection date and time. Messages left for the Electrical Inspector after 9am will be returned the next morning. An adult (who does not need to be the electrician – a homeowner, family member, or builder is fine) needs to be there to let the inspector into the house. The inspector knows what to look for once he is in the house and can phone the electrician if there is a question about the project while he’s on site.
The electrical inspector notifies CMLP of all approved electrical inspections.
Sheet Metal Permits and Inspections
Sheet metal permits and inspections are required whenever duct work beyond minor repairs are part of a heat pump installation, such as installing new ducts or re-routing existing ducts. The process for getting permits follows the same process outlined above. The sheet metal contractor or the homeowner may call the Building Dept. to schedule sheet metal inspections at (978) 318-3280.
Town of Concord Board of Health Drilling Permits
Ground-source heat pump installers must apply for a drilling permit from the Town of Concord Board of Health before drilling begins. The permit application allows the Board of Health to verify that the wells are set back an appropriate distance from existing sewer and water lines. Permits can be requested via the Town's online permitting system. Contact information and hours for the Board of Health are here.
CMLP's 90-day rebate application window begins on the later of the Concord Building Department's electrical inspection approval date or sheet metal inspection approval date (applicable if the project requires sheet metal ducting work that goes beyond minor repairs). Projects for which CMLP does not receive a rebate application within the 90-day window are not eligible for a rebate.
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Before beginning your rebate application:
- know the date of the Concord Building Department's:
- electrical inspection approval
- sheet metal inspection approval, if the project requires sheet metal ducting work that goes beyond minor repairs.
- Know the Concord Board of Health drilling permit issue date if the system is a ground-source heat pump.
(Payment of rebates is contingent upon verification by CMLP that Town records show the appropriate inspection approvals and drilling permits for the project. Find out more about permits and inspections in the Quality Assurance section on this page. The Building Department's contact information and hours are here. The Board of Health's contact information and hours are here.)
- If your home was built before 2008, know the date of your completed or scheduled home energy assessment or the date of your final HERS rating report, if applicable, or have an electronic copy of your Energy Saver Home Loan Program decarbonization plan ready to upload.
- Have electronic copies of the following documents ready to upload:
- invoice from a heat pump installer showing:
- installation address
- installer company name
- outdoor and indoor equipment model numbers
- integrated control model numbers, if applicable.
- If the heat pump is sized to be the sole source of heating in the residence:
- Manual J heat load calculation, if the project was not pre-approved for a rebate.
- Whole Home Verification Form signed by you and your installer. The whole-home heat pump verification form is not required for partial home rebate applications.
- for ground source heat pumps, a software design report showing the system's heating capacity at the incoming water temperature.
Rebate Application: Access the rebate application at the button below, and complete it with assistance from your installer or CMLP staff person Jan Aceti (jaceti@concordma.gov or 978-318-3151). If you are working with a heating/cooling coach, they may be able to help you as well.
CMLP's 90-day rebate application window begins on the later of the Concord Building Department's electrical inspection approval date or sheet metal inspection approval date (applicable if the project requires sheet metal ducting work that goes beyond minor repairs). Projects for which CMLP does not receive a rebate application within the 90-day window are not eligible for a rebate.
If an application received by CMLP is incomplete or has not met all of the rebate requirements, CMLP may reach out once to the installer and to the customer by both phone and email. If outstanding issues are not resolved within 30 days of the communication, the project will no longer be eligible for a rebate.
CMLP's liability is limited to paying the rebate for which the project is eligible. CMLP is not liable for any consequential or incidental damages or for any damages in tort connected with or resulting from participation in this offer.
The Town may inspect equipment to verify the above information up to 1 year after receiving the rebate application.
- know the date of the Concord Building Department's:
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Rebates will not be issued until projects have passed the Concord Building Department's electrical inspection. If sheet metal duct work beyond minor repairs was also part of the project, it must also have passed a sheet metal inspection. Find out more details about permits and inspections in the Quality Assurance section on this page. Contact information and hours for the Building Department are here. Ground-source heat pump installers must apply for a drilling permit from the Town of Concord Board of Health before drilling begins. Contact information and hours for the Board of Health are here.
All rebates of $750 or less are issued as a credit on your electric bill. If the credit is larger than your electric bill that month, the remaining credit will be applied to your Concord municipal utility bills (electric, water/sewer, and broadband) each month until the credit is used up.
Any customer in good standing may choose to receive a rebate over $750 as either a bill credit on their electric account, or as check from the Town, paid either to the customer or to the customer's heat pump installer. Indicate your preference on your rebate application. If you wish your rebate check to be paid to your installer, upload a copy of the installer's W-form in the appropriate field on teh rebate application. If you are requesting a check paid to you or to your installer, and you have been in arrears frequently in the past two years, CMLP may apply all or part of the rebate as a bill credit rather than as a check.
A rebate check will arrive via the postal mail to the payee address designated in the rebate application 6 to 8 weeks after rebate approval.
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Effective April 1, 2026, CMLP is introducing a residential Time-of-Day (TOD) electric rate. With this new rate, the price you pay for electricity is based on when you use it. On weekdays, by shifting some of your electricity use to off-peak hours— before 3 PM and after 7 PM — you can save money and reduce strain on the grid.
When heating with heat pumps, should you turn your thermostat down between 3 PM and 7 PM on weekdays to save money? Or maybe jack the thermostat up before 3 PM to pre-heat your home and then turn it way down from 3 PM to 7PM? The best approach for heat pump users is to do neither of the above. Unlike traditional furnaces, heat pumps are designed to run steadily and efficiently rather than ramping up and down.
- Don’t Change Your Winter Heating Habits: We do not recommend adjusting your thermostat during the 3 PM – 7 PM peak window. This can actually use more electricity. When using heat pumps for cooling during the summer, raising the thermostat a few degrees between 3 PM and 7 PM may result in savings. However, that depends on specific home conditions such as insulation levels and equipment types.
- The “Super Off-Peak” Advantage: Because heat pumps use the most electricity during cold winter nights, you will automatically benefit from the Super Off-Peak rate (1 a.m. – 5 a.m.), the lowest TOD rate that CMLP charges. Most heat pump users are expected to see savings compared to the flat rates in effect prior to April 1, 2026.
- Thermostat Programs: If you enroll in the Connected Homes thermostat program, your thermostat will not be turned up or down from 3 PM to 7 PM on weekdays. Instead, you will be notified if a monthly peak event is forecast to fall outside of the 3 PM - 7 PM weekday window. Unless you opt out, your thermostat will be raised or lowered (depending on the season) by up to 3 degrees during the peak event. You will be eligible for a $5 incentive per device enrolled in any month in which a peak event is called. No more than 2 - 3 of these events are anticipated throughout a calendar year.
Why Time-of-Day Rates?
Electricity costs more to produce and deliver when everyone is using it at once. Time-of-Day (TOD) rates reflect these real-time costs. These rates encourage customers to use electricity when demand is low, which will lead to lower long-term costs for the entire community, reduced carbon emissions by using cleaner electricity sources available during off-peak hours, and a strengthened electricity grid by preventing system overloads.
How Time-of-Day Works
Starting April 1, 2026, your rate will depend on when you use electricity. You will see these changes reflected beginning with your May 2026 bill.
See the rate breakdown (per kWh) in the table to the right:
Flexibility Matters: We believe TOD rates are the best way to save, but we understand that every home is different. If you find this structure doesn't fit your lifestyle, an Opt-Out Rate remains available. View rates, FAQs and learn more on our website: concordma.gov/tod Please request a meeting with one of CMLP’s trained heating/cooling coaches if you have further questions about best practices for heating and cooling your home with heat pumps.
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If you currently use ETS (Electric Thermal Storage) heating, and plan to switch partially or fully to heat pump heating, you will want to choose among the following electric panel configuration/electric rate options:
- If you wish to continue using ETS heating on the ETS rate, you must ensure that the breaker for your new heat pump system is not installed in the electric panel that feeds your ETS equipment.
- You can place the heat pump breaker in your ETS electric panel and continue using your ETS heating system, but it will no longer qualify for the ETS rate. CMLP will remove the ETS switch, and update the meter serving that panel to the appropriate Time-of-Day or Opt-Out residential electricity rate, which will apply to both your ETS system and your heat pump. You must notify Customer Service (concordutilities@concordma.gov), so that the ETS switch can be removed, and the meter re-programmed to bill electricity usage at the appropriate residential rate.
- If you plan to stop using ETS heating altogether, you may repurpose the electric panel feeding your ETS equipment to supply electricity to your heat pump system instead. However, you must notify Customer Service (concordutilities@concordma.gov), so that the ETS switch can be removed and the meter reprogrammed.
You are not required to choose one of these options in order to be eligible for a rebate. The information above is provided so that you may make an informed choice among your electric panel configuration and electric rate options.
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Energy Saver Home Loans for Qualifying Households
Massachusetts offers a low-interest loan program for financing energy saving changes to your home, the Energy Saver Home Loan Program. If your income is less than $205,335 and the changes reduce your home's energy use more than 20%, you may be eligible. Usually, whole home heat pumps show significant energy savings, as do some weatherization improvements. Learn more.
MLP-Z Loan
The Massachusetts Department of Energy Resources is expected to launch the MLP-Z loan program in the first part of 2026. Through this program, Municipal Light Plant (MLP) customers who heat with fuels other than natural gas may be eligible to receive 0% financing up to $25,000 for 5 years for efficiency and electrification projects, including weatherization and heat pump installations. CMLP's customers may pre-apply for the loan via the Zero-Interest Energy Efficiency Loan Program website. Qualified applicants will be contacted to submit full applications once the program launches.
Mass Save 0% Interest HEAT Loans
CMLP customers who heat with natural gas may be eligible for 0% financing for weatherization and heat pump installations through Mass Save's HEAT loan program.
Home Equity Loans
Home improvements can be also financed by leveraging the equity in your home. There are different ways of doing this. The Federal Trade Commission describes the pros and cons of loans and lines of credit in this article. It also explains how to watch for disreputable service.
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Contact Jan Aceti, CMLP's Energy Efficiency & Electrification Coordinator at jaceti@concordma.gov or 978-318-3151.