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New England winters are both beautiful and unpredictable. Trust the local heating experts for all your service, maintenance, and installation needs.


Keep your cool. We have over 25 years of experience installing, repairing, servicing and maintaining central air (HVAC) units and ductless air conditioning systems.

Service Membership

Protect your home heating and cooling systems with our exclusive Safety & Efficiency Membership and enjoy year round savings on all your service and routine maintenance needs.


Our family owned, award-winning company has been providing the best energy solutions for New England homeowners for over 25 years.


From free home energy assessments to comprehensive maintenance and the installation of all types of heating and cooling, ventilation and air quality systems, Key Heating & Air Conditioning Inc. has the professional team to count on for all of your energy needs.


Our factory-trained technicians, project managers and installation crew have a combined trade experience of more than 150 years in all aspects of the heating, cooling and air quality business. In fact, we have team members who have been working with Key for more than 15 years.


We Service All Brands


Request An Appointment Online

For any inquiries, questions, or to set up an appointment, please call: 603.436.8811 or fill out the contact form.

Contact Us

Phone: 603.436.8811

Text:     938.444.4537

Email Us


8 Continental Dr. Exeter, NH 03833

6 Central Ave. Wolfeboro, NH 03894

69 Main St. Alton, NH 03809

Mailing Address

8E Continental Dr.

Exeter, NH 03833

© 2020 by Key Heating & Air Conditioning Inc.