Key Heating & Cooling

Key Heating & Air Conditioning is a family-owned New Hampshire contractor serving homeowners across New England with home energy assessments and heating, cooling, ventilation, and indoor-air-quality solutions. Its factory-trained team installs, maintains, and repairs HVAC equipment, offers 24/7 emergency service and free estimates, and works with alternative-energy systems including geothermal heating and cooling and solar thermal. The company’s mission is to provide technically current comfort solutions and excellent customer service.