Key Heating & Cooling continues to proudly serve the comfort needs of New Hampshire’s Seacoast & Lakes region as well as York County Maine communities since 1993. We work hard to provide the best service possible at competitive prices. We offer FREE In-Home Consultations and help educate you about your options when it comes to replacing or installing your heating or cooling systems. We install renewable energy Geothermal systems and continue to be the leader in this ever changing field; in addition to traditional furnaces, boilers, HVAC systems and ductless equipment. Our factory-trained technicians are available 24/7 for all your service and maintenance needs and have a combined trade experience of more than 150 years. Allow us to be your #key2comfort for all things heating and cooling and comfortable!