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Madbury NH HVAC Service

Your Local HVAC Experts

Heating & Air Conditioning Repair For Madbury

From heating to air conditioning to air purification systems and thermostats, Key Heating & Air Conditioning has been servicing and installing all major brands for over 25 years. There is no heating or air conditioning problem we can’t fix. We’re available 24 hours a day, 7 days a week. Just call us at 603-436-8811, or text us at 938-444-4537 for a speedy response and a technician headed to your Londonderry home.


At Key Heating & Air Conditioning we take pride in our work and making sure our customers are comfortable in their homes. We will treat your home as our own, keeping your floors clean and our workspace tidy. We offer impeccable customer service with quick solutions customized to your situation. Our service is backed by over 25 years of delighting homeowners in Londonderry. Our certified technicians make your comfort a priority.


Our 24/7 emergency HVAC service is a large part of that because you can consistently rely on our company to answer your call personally. We offer flexible payment options, convenient scheduling, and personalized customer service to make your experiences with us easy and straightforward.


Whether we’re resolving problems or preventing new ones, we’re happy to work with you on any aspect of your heating and cooling needs. No matter where you are in the Londonderry area, give us a call at any hour of the day, and we’ll be there for you.

Safety & Efficiency Membership

Safety & Efficiency Membership

Save money on all your annual tune-up services, emergency repairs and more with our exclusive Safety & Efficiency Membership.

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