• Ductless Solutions

    Ductless heating and cooling is the perfect solution for improving air quality and better regulating problem rooms in your home. Read More
  • Stay In Control While On the Go

    A Wi-Fi thermostat is the ideal way to control the temperature in your home, vacation home or even rental property, through your smartphone or tablet! Read More
  • Cut Your Heating and Cooling Costs up to 80%

    Take advantage of the near constant temperatures of the earth - Geothermal is a great choice for both heating and air conditioning your New England home. Read More
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Energy Solutions

Your choice for residential heating and cooling _ oil, propane, natural gas and alternative energies.

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Maintenance

Our professionals repair and tune-up all major brands. Ask about our flat-rate pricing.

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Installation

Call on our experienced technicians to bring you the latest technology and the major brands.

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Key Heating & Air Conditioning, Inc.

“Unlocking the Earth’s Green Energy”

Key Heating & Air Conditioning, Inc., Heating & Air Conditioning, Exeter, NH

You want the most efficient heating and air conditioning systems for your home. That’s something our award-winning, family-owned company has been delivering to satisfied New England customers for more than 20 years.

At Key Heating & Air Conditioning, our professional technicians provide you with the name brands you want and the customer service you expect _ all at competitive prices.

We Carry All the Brands

Mitsubishi, Bryant, Bosch, Climate Master, Honeywell, Boderus, yes we carry those lines, and so many more. Our mission is to be your “go-to” for all of your home energy needs _ from free home energy assessments to comprehensive maintenance and the installation of all types of heating, air conditioning, air quality and ventilation systems and the latest in Wi-Fi thermostats.

Call On Us When You Build

Building a new home? We will provide you with a complete cost analysis of your options, for both ducted systems and ductless systems, including oil, propane, natural gas and alternative energy solutions like geothermal and solar thermal.

Alternative Energy Is A Specialty

Key is New England’s largest residential geothermal heating and cooling company. We also are a Diamond Dealer for Mitsubishi’s cooling and heating solutions, which provide energy efficiency through advanced technologies for controlling the temperature and comfort in each room of your home. By choosing a Diamond Dealer, you will receive a two-year extension on what is already a five-year manufacturer’s warranty on Mitsubishi products. That’s a seven-year warranty on Mitsubishi!

Talk About Efficiency

Want your current home to be more efficient? We offer a whole home performance evaluation, providing you with a full profile and recommendations to reduce your home’s energy costs and carbon footprint. Key technicians will complete a building analysis that determines heat loss/heat gain to determine the optimal heating and cooling solutions for your specific needs.

At Your Service

Key services all brands and is your one-stop shop in New Hampshire, Massachusetts and Maine for residential heating and cooling, HVAC (heating, ventilating and air conditioning), preventative maintenance, indoor air quality, generators, Wi-Fi thermostats and all of your electrical needs.

Contact Us Today

Call 603-436-8811 or 844-KEY-HVAC to schedule an appointment today. Or visit our new centrally-located showroom at 8E Continental Drive in Exeter, NH, to see Mitsubishi products on display.

A Recognized Leader

  • 2014 Business of the Year nominee, Exeter Area Chamber of Commerce
  • A+ rating from Better Business Bureau
  • Diamond Dealer status from Mitsubishi, extending your manufacturer’s warranty to seven years
  • Platinum Dealer status from Climate Master


Key Heating & Air is a member of the Air Conditioning 
Contractors of America.


We are also a member of the The Exeter Area Chamber.