Find the Best HVAC Contractors in Exeter, NH

Key Heating & Air Conditioning provides residential HVAC services including heating, cooling, geothermal systems, and air quality solutions across New England. Established in 1993, we combine technical expertise with 24/7 emergency support to deliver energy-efficient comfort solutions. Our BBB A+ rated services include system installations, maintenance, and environmentally responsible alternatives for homeowners in NH and Southern ME.