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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 year		Must be on both ENERGY STAR and AHRI-Certified Lists
		Whole Home	$15,000 per home	See Note below**
	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	$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	$10,000 per home	See Note below**

* Tons are calculated based on AHRI cooling capacity divided by 12,000 BTUs.

**Heat pumps must be capable of being the sole source of heating for the residence. Whole-home heat pump verification form must be signed and submitted with rebate application. 

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. 

- $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.