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.
