Key HVAC has been providing the latest heating & cooling energy solutions for New England homeowners for over 25 years. Our family-owned, award-winning business services the NH Seacoast and Lakes Region saving homeowners costs, time, and headaches. 

Heating Services

New England winters are both beautiful, unpredictable, and at times, brutal. Trust Key HVAC local heating experts for all your service, maintenance, and installation needs.

Air Conditioning Condenser

Keep your cool. The Key team has over 30 years of experience installing, repairing, servicing, and maintaining central air (HVAC) units and ductless air conditioning systems.

Happy Woman
Service Membership

Gain some peace of mind knowing that you have year-round savings on all your service and routine maintenance needs, at an affordable price. Become a member today with our exclusive Safety & Efficiency Membership. 


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Total Yrs Experience

Home Tips For Optimizing Your Air, Heating & Cooling

Key HVAC reveals tips and tricks to keep your home running efficiently.

We Service All Brands

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

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Contact Key Today

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.