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Mountain cabin in winter

Heating Services

We deliver heating services, repairs, maintenance, new installations
and more.

New England winters are both beautiful and unpredictable. Here at Key Heating & Air Conditioning Inc. we have over 25 years of experience installing, repairing, servicing and maintaining residential heating systems to keep you warm.


Having trouble with your furnace, boiler, geothermal or heat pump? Our heating system technicians are factory trained to handle all problems big and small. 


We also install brand new heating systems or replace your aging one with a new energy efficient system. We are committed to recommending and helping you choose the best home heating system based on your specific needs. Our home comfort advisors can provide you with a free home analysis and custom proposal, as well as educate you along the way. We also offer great financing options with credit approval to help you get the job done.


We don’t sell fuel here at Key, so we are unbiased in our recommendations, and we are truly able to focus on the ideal home heating equipment for you.

heating repairs

Key HVAC is the most reliable and fastest service to repair all your heating needs.

heating maintenance

Our qualified technicians perform maintenance year round to ensure your system is optimal. 

heating replacements & new installs

Key HVAC installs new heating systems with customer satisfaction, guarenteed.

Filters, humidifiers & thermostats

Key HVAC keeps your home comfortable while keeping costs down with these heating accessories.

We Service All Brands

Contact Key Heating & Cooling

We serve the NH Seacoast, Lakes Region and parts of Southern ME. Wondering if we serve your town? Check out our list of towns and cities where Key Heating and Cooling travel to!

For any HVAC inquiries, questions, or to set up a heating & cooling installation appointment, please call: 603.436.8811 or fill out the contact form.

Thank you for your interest! Key HVAC has you covered! We'll be in touch as soon as possible to schedule an appointment at your convenience.

By submitting, you authorize Key Heating & Air Conditioning to reach out via phone, email, or text for explicit information about the project needs. We will never share your personal information with 3rd parties for marketing purposes or spam you. You can opt out at any time. Message/data rates apply. Consent is not a condition of purchase. Terms and Conditions 

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