Key Heating and Air Conditioning is the largest residential geothermal company in New England.


Our environmentally-conscious, award-winning company offers geothermal heating and cooling systems to homeowners who want an alternative energy source that is environmentally-friendly and sustainable. In fact, it’s estimated that converting to a geothermal heating and cooling system will reduce your household energy emissions by up to 70 percent.


Simply put, geothermal heating and cooling systems take advantage of the near constant temperatures of the earth to heat and cool your home.


Geothermal is a great choice for both heating and air conditioning your New England home. It recovers the heat from the earth and repurposes it to heat and cool your home.


At Key, we sell, install and service geothermal heating and cooling systems, including geothermal heat pumps and radiant floor heating systems.

How It Works

Geothermal heating and cooling systems use the earth’s nearly constant temperatures to heat and cool your home. In the cooler months, the geothermal system transfers the heat from the earth to your forced air heating system or water radiator system. In the warmer months, the geothermal system works in reverse to keep your home cool.

Federal Tax Credit Available

Under current federal law you can take advantage of federal tax credits when installing a geothermal heat pump system in your home.


The "Energy Efficiency Property Tax Credit" is currently set at 26% of your total installation cost through 2022. In 2023, the credit will be reduced to 22% and then expires in 2024.

Take advantage of these rebates while available! Contact us today to request a free in-home design consultation.

Find Out How Much You Could Save Switching

To Geothermal

Contact Us

Phone: 603.436.8811

Text:     938.444.4537

Email Us


8 Continental Dr. Exeter, NH 03833

6 Central Ave. Wolfeboro, NH 03894

69 Main St. Alton, NH 03809

Mailing Address

8E Continental Dr.

Exeter, NH 03833

© 2021 by Key Heating & Air Conditioning Inc.