City of Cambridge

EnergySage is here to help you transition to clean heating and cooling technologies

Cambridge Clean Heat is a city-wide initiative to make it easy for residents to transition to cleaner heating and cooling technologies.

Air source heat pumps and solar hot water systems are an efficient and cost-effective way to make your home comfortable year-round. These technologies not only help save you money on energy costs, but also help Cambridge decrease its overall carbon footprint, benefiting your neighbors and our city.

More infromation on the Cambridge Clean Heat program can be found at

air source heat pumps

Air Source Heat Pumps

Air source heat pumps are a clean technology you can use to both heat and cool your home. There are a number of economic, environmental and health benefits associated with installing air source heat pumps. Learn all about this technology and whether it's the right option for you.

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Solar Hot Water

You can use the power of the sun to heat your home's water supply. This technology can help you save on water heating costs and decrease your carbon footprint. Read on for more information about solar hot water, the costs of installing a system, and more.

Why Clean Heating and Cooling?


Environmentally Friendly

The widespread use of clean heating and cooling technologies means fewer greenhouse gas emmisions and pollutants entering our atmosphere.

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Economic Benefits

Though often more expensive upfront, both air source heat pumps and solar hot water systems can help save you money on your energy bills throughout their lifetime.

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Health and Wellness

As Cambridge's reliance on fossil fuels lessens, so will the amount of pollutants in the air, improving air quality throughout the country.

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Air source heat pumps and solar hot water systems operate very quietly in comparison to other heating and cooling technolgies, ensuring comfortability throughout your living space.

Incentives for Clean Heating and Cooling


Solar hot water and air source heat pump systems installations in Massachusetts qualify for the Alternative Energy Certificate (AEC) program. With this program, non-emitting renewable technologies generate certificates based on their energy production. These certificates are sellable to utility companies looking to meet state-mandated renewable energy goals. The revenue earned from these certificates will help you to further save on your solar hot water or air source heat pump installation. Learn more about AECs here.

Mass Save HEAT Loan

If you're installing a solar hot water system or air source heat pumps, you may be elgible for a 0% interest HEAT Loan from Mass Save. You can finance up to $25,000 of home energy efficiency upgrades. Find out more about Mass Save's HEAT Loan program. 

Rebates and tax credits

Massachusetts has a host of incentives and rebates available to help decrease your investment for green heating and cooling technologies. Learn more about rebates available from Mass Save, or apply for the rebates here.

Cambridge Clean Heating and Cooling Systems in Action 

"Reducing our carbon footprint by using the heat of the sun!"

Mina of Cambridge installed a few solar collectors to heat her multifamily residence. The system provides hot water for two families in the building, and covers roughly 50-74% of their total hot water needs. They decided to install solar thermal after learning that their roof wasn't good for solar PV because of limited roof space; with this technology, she's still benefiting from solar energy and reducing her carbon footprint!

Read more about her solar hot water installation.

Mini-split installations for multi-family homes

Seth F. installed mini-splits for his home in Massachusetts. His heat pumps, financed with a zero-interest HEAT loan, save him roughly $1,000 a year. The mini-splits are paired with solar PV system and insulation from MassSave. Best of all, the ductless heat pumps cover 100% of his heating and cooling needs: "Don't be afraid of relying on heat pumps as your sole heating system--cold climate heat pumps have plenty of power as long as your home is insulated properly."

Learn more about his heat pump installation.