Variable Refrigerant Flow Systems (VRF)

Install a high-efficiency variable refrigerant flow systemand improve occupant comfort.

Please note, this webpage reflects program changes as of June 1, 2026.

This advanced technology allows you to individually control the temperature of different areas of your building—driving maximum occupant comfort.

Variable Refrigerant Flow Systems (VRF) present an energy-efficient, flexible alternative to conventional HVAC systems for a variety of commercial and industrial spaces.

They consist of an outdoor unit connected to multiple indoor units via refrigerant piping to provide cooling and heating to individual zones or rooms in a building.

This heat pump serves as a great solution for businesses or buildings without existing ductwork.

New program process

Projects Up To 35 Tons: Projects 35 tons or less are processed through the standard Mass Save heat pump rebate pathway.

Projects Over 35 Tons: Effective June 1, 2026, projects over 35 tons will be processed as custom projects and require a custom project application and pre-approval prior to equipment installation. Contact the electric program Sponsor or refer to the below “How to Participate” Tab for details.

Variable Refrigerant Flow Systems
Equipment Type Efficiency Requirements Amount ($/Ton)
Air Source Variable Refrigerant Flow Heat Pump Refer to MassSave.com/cihpqpl for list of equipment and minimum requirements  $2,800 

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Projects Up To 35 Tons

  1. Purchase & Install Eligible Equipment
    Have a licensed contractor install eligible equipment.
  2. Submit Rebate Form with Required Documentation
    Apply Online
    Or
    Print & Mail Rebate Form 

Projects Over 35 Tons

  1. Reach out to your electric Mass Save Sponsor for guidance on custom applications. Municipal light customers should work with their gas program Sponsor as applicable. Please be aware: while heat pump rebate levels remain unchanged, custom projects must meet cost-effectiveness criteria and require additional project information.
  2. You can find the Sponsor through the Find Your Sponsor tool or refer to the table below.

Air Conditioning Incentives
Mass Save Sponsor E-Mail Phone
Cape Light Compact [email protected] 1-800-797-6699
Eversource [email protected] 1-844-887-1400
Liberty [email protected] 1-774-488-6224
National Grid [email protected]  1-800-787-1706
Unitil [email protected] 1-888-301-7700

 

To learn more about how heat pump technologies work, explore these available training resources.

Constructing a new building or completing a major renovation? Read more about our program offerings here.

Can’t find what you’re looking for? The Sponsors of Mass Save offer customized project support to help your business save money and energy, and reduce greenhouse gas emissions. If you have any questions, please contact your Sponsor

For a full list of eligibility requirements and dates, please reference the rebate form.

  • Equipment displacing natural gas eligible only for commercial or industrial metered customers receiving natural gas service from a Sponsor of Mass Save, including those in municipal electric territories.
  • Equipment displacing oil, propane, or electric resistance eligible only for commercial or industrial metered customers receiving electric service from a Sponsor of Mass Save.
  • Equipment must be listed on the Mass Save Heat Pump Qualified Product List (QPL).
  • Equipment must be used for heating to supplement or replace existing oil, propane, natural gas, or electric-resistance systems.
    • Integrated controls automatically manage when a backup heating system turns on at a pre-set outdoor temperature, either as supplemental heat or the sole heating source.
  • If fossil fuel heating equipment will remain in place, customers must either:
    • Install an integrated control from the Mass Save QPL (MassSave.com/cihpqpl), or
    • Certify that an existing building control system is capable of operating both the heat pump and existing heating equipment in parallel.

    Documentation of control sequence may be required.

    Customers should work with their contractor to determine the outdoor temperature at which the backup heating system turns on. The program allows your heat pump to continue operating even when the backup system turns on. This helps you maximize heat pump usage for greater energy savings and comfort.

    Customers can choose the right temperature setting for their building based on current fuel prices, maximizing heat pump usage, or another strategy that balances utility cost, comfort and efficiency goals.


  • Equipment that has already received a rebate from a Sponsor of Mass Save or is being installed in a new construction or major renovation project is not eligible for a rebate.

Contact your Sponsor before installation if:

  • The proposed project is more than 35 tons.
  • The proposed project is for a new building being constructed or a major renovation (visit www.MassSave.com/cincmr).
  • The proposed project is for a multifamily building, as rebate eligibility depends on the metering of the facility.
  • The heat pumps that are being installed will be using a hydronic or water loop internal to the building (i.e., not a ground loop) as a heat source/sink.
  • You or your contractor has questions about project eligibility.
  • The proposed project is replacing existing heat pump equipment.

Not Sure Where to Start?

Schedule a no-cost, virtual Commercial Heat Pump Consultation with a Mass Save Decarbonization Specialist for guidance. Learn how heat pumps and  Variable Refrigerant Flow (VRF) systems work, explore the best solution for your building or business, and receive help navigating the rebate process.