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Key Heating and Cooling received consistent praise for responsive emergency service, with technicians arriving promptly even for non-customers and providing thorough diagnostics and explanations of repairs. Installation quality and technician knowledge were highlighted across reviews, with crews demonstrating professionalism during multi-unit setups and maintenance visits, and service representatives like Jon DeSisto, Petey, Michael, and Pete earning recognition for patient communication and accommodating customer requests.
Based on Google reviews
About the Contractor
Key Heating & Air Conditioning has served New Hampshire's Seacoast and Lakes Region since 1993, operating from two offices: 8 Continental Drive in Exeter and 69 Main Street in Alton. As one of New England's largest residential geothermal installation companies, the award-winning, family-owned firm employs approximately 30 factory-trained and IGSHPA-certified technicians with over 200 years of combined experience. The company designs, installs, and services WaterFurnace geothermal heat pumps and radiant floor heating systems for both residential and commercial properties, with systems capable of reducing household energy emissions by up to 70 percent. Financing options include Clean Energy Credit Union geothermal loans and NHEC Co-Op programs. Key Heating also assists customers in accessing NHSAVES incentives, ENERGY STAR rebates, and IRS Form 5695 residential energy tax credits. Available 24 hours a day, seven days a week.
Verified active operator per https://www.keyhvac.com/ + https://www.keyhvac.com/geothermal (Bundle 5 audit 2026-05-29)
One of the largest residential geothermal installation companies in New England with over 33 years of experience and factory-trained, licensed technicians specializing in both geothermal heat pumps and radiant floor heating systems.
Service Details
schedule
Years in Business
33 years
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Financing
Available
factory
Brands Installed
WaterFurnace
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WaterFurnace
Authorized Dealer
Regulatory Context
Geothermal Permitting in New Hampshire
Geothermal heat pump installations in New Hampshire require specific permits and compliance with state regulations regarding well drilling, loop installation, and refrigerant handling. Contact your local building department for specific requirements in your area.
How much can I save with a geothermal system in Exeter, NH?add
Converting to a geothermal heating and cooling system can reduce your household energy emissions by up to 70 percent. Key Heating & Air Conditioning provides free in-home evaluations and custom proposals to help you understand your specific savings potential.
What financing options does Key Heating & Air Conditioning offer in Portsmouth and New England?add
Key Heating & Air Conditioning offers great financing options with approved credit, plus help navigating energy incentives from NHSAVES ($500 per ton), ENERGY STAR, IRS tax credits (Section 5695 Residential Energy Tax), and other state rebate programs through the DSIRE database.
What geothermal systems and services does Key Heating & Air Conditioning install?add
The company designs, installs, and services geothermal heat pumps, radiant floor heating systems, and complete HVAC solutions tailored to New England's climate. They work with both forced-air and water radiator systems for new installations, replacements, repairs, and maintenance.
Does Key Heating & Air Conditioning service both heating and cooling in Exeter?add
Yes. In cooler months, their geothermal systems transfer heat from the earth to your forced air or water radiator system. In warmer months, the system reverses to keep your home cool, providing year-round comfort for New England's fluctuating climate.
What experience and qualifications do Key Heating & Air Conditioning technicians have?add
Key Heating & Air Conditioning has over 33 years of experience and employs factory-trained, licensed technicians. The award-winning, environmentally-conscious company is one of the largest residential geothermal installation companies in New England.
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Request a Quote from Key Heating & Air Conditioning
Your request goes straight to Key Heating & Air Conditioning. You'll hear from them directly, usually within 1-2 business days.
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Quote Request Received
Thanks — we'll review your request and forward it to up to 3 verified IGSHPA installers in Exeter within 1 business day. They typically respond within 1–2 business days after that.
If you need to reach Key Heating & Air Conditioning directly: (833) 285-8811
Geothermal heat pump installations in New Hampshire may require drilling permits, environmental site assessments, and compliance with local well and thermal energy regulations. Requirements vary by jurisdiction and system type (vertical, horizontal, open-loop). Contact your local municipality, state energy office, or a licensed geothermal installer for specific permitting requirements in your area.
