Business Details
33 Years
experience
Emergency
services
Trusted HVAC Solutions for New England Homes
Key Heating & Air Conditioning has been delivering cutting-edge heating and cooling solutions to New England homeowners since 1993. As a family-owned, award-winning business, we combine over 150 years of collective industry expertise with factory-trained technicians to provide comprehensive HVAC services, including installations, repairs, and maintenance. Our commitment to ongoing technical training ensures our team remains at the forefront of industry advancements, while our 24/7 emergency service guarantees immediate support when needed. We prioritize customer satisfaction through transparent recommendations, unbiased equipment selection, and competitive pricing. Our environmental stewardship is demonstrated through EPA-certified refrigerant management, high SEER equipment installations, and renewable energy solutions like geothermal systems.Recognized by the Better Business Bureau with an A+ rating, we maintain rigorous quality standards across all operations, from free energy assessments to complete system replacements. Our team's longevity - with members serving over 20 years - reflects our strong company culture that values both professional excellence and community engagement. We offer flexible financing options through partnerships with Rheem, Mitsubishi, and local credit unions to make energy-efficient upgrades accessible. With service locations in Exeter and Alton, NH, we serve the NH Seacoast, Lakes Region, and Southern Maine, maintaining a 100% customer satisfaction guarantee on every project.
Services
Heating Solutions
Cooling Systems
Geothermal Installation
Electrical Services
HVAC Maintenance
Details
- Year established: 1993
Highlights and features
- 30+ years of combined technical expertise with factory-trained technicians
- 24/7 emergency HVAC service with rapid response times
- EPA-certified refrigerant management specialists
- Better Business Bureau A+ rated since 1993
- Exclusive Safety & Efficiency Membership program with year-round savings
Associations and certifications
- Better Business Bureau (BBB)
What people say
Great Support
Very knowledgeable
Outstanding service
Professional job
Best I have had
Services
HVAC Installation
We provide complete HVAC system installations for residential properties, featuring energy-efficient furnaces, air conditioners, and heat pumps. Our certified technicians perform proper load calculations to determine optimal system sizing while ensuring code-compliant installations. Customers receive personalized equipment recommendations based on home size, insulation levels, and climate requirements, with financing options available for qualifying homeowners.
Geothermal Systems
Our geothermal heating and cooling solutions utilize ground-source heat exchange technology to reduce energy consumption by up to 70%. We design and install closed-loop systems tailored to property characteristics, including horizontal and vertical configurations. All installations qualify for federal tax credits, with our specialists providing complete system maintenance and performance optimization services for maximum efficiency.
Cooling Solutions
We offer comprehensive cooling services including central AC and ductless mini-split system installations, repairs, and maintenance. Our technicians diagnose refrigerant levels, inspect electrical components, and clean coils to maintain peak performance. Emergency service is available for system failures, with same-day diagnostics and repair options during extreme weather conditions.
Electrical Services
Our licensed electricians provide whole-house surge protection, safety inspections, and generator installations. Services include panel upgrades, circuit breaker replacements, and electrical system diagnostics for both new construction and existing homes. We ensure all work meets NEC standards with proper permitting and final inspections included in every project.
Maintenance Programs
Our Safety & Efficiency Membership includes bi-annual system inspections, priority scheduling, and discounted repair rates. Technicians perform comprehensive maintenance including filter replacements, coil cleaning, and safety checks to extend equipment lifespan. Members receive exclusive access to financing offers and priority emergency service during peak seasons.
Questions
What HVAC services do you offer?
We provide complete heating, cooling, and geothermal system installations, repairs, and maintenance for residential properties across New England.
Do you offer emergency HVAC service?
Yes, we provide 24/7 emergency service with rapid response times for heating and cooling system failures.
What areas do you service?
We serve the NH Seacoast, Lakes Region, and Southern Maine, with two service locations in Exeter and Alton, NH.
Are financing options available?
Yes, we offer financing through Rheem, Mitsubishi, and local credit unions with approved credit applications.
What makes geothermal systems beneficial?
Geothermal systems reduce energy consumption by 50-70% using ground-source heat exchange technology while qualifying for federal tax credits.
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Reviews (7)
Katrine Arnold
Jan 03, 2022
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Positive:Professionalism,Quality,Responsiveness
Was professional, got the answers we needed and we are very happy.
Service:Heating maintenance
Was professional, got the answers we needed and we are very happy.
Service:Heating maintenance
John J. Leary
Jan 02, 2022
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Positive:Professionalism,Responsiveness
Emergency service call on Christmas Eve. Our boiler malfunctioned. Technician Mike Ring did everything he could to get the boiler motor to work, but it was too late. We appreciated his prompt response and knowledge of the problem. We will continue to use Key for our HVAC needs going forward.
Emergency service call on Christmas Eve. Our boiler malfunctioned. Technician Mike Ring did everything he could to get the boiler motor to work, but it was too late. We appreciated his prompt response and knowledge of the problem. We will continue to use Key for our HVAC needs going forward.
Rds
Dec 27, 2021
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I use them because their staff are all professional and go way beyond others I have used. My annual boiler service was done to a level even I didn't expect. The techs didn't like something and took the time to stop and get the correct replacement part. I was impressed. Both were just outstanding.
Wvc
Nov 07, 2021
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Service inspection was completed on 10/14/21 by Jimmy Campbell. All I can say is that he was EXCELLENT! Would highly recommend him. He went over and above explaining to me how the heating system works. He also pointed out red flags to watch for. For example, what the recommended psi and temperature guages should read when the system is running. We could not have had a better tech. Thank you for sending him.
Tim Caravella
Oct 24, 2021
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A complete disaster... we spent good money on a brand new A/C system and they did not install it correctly. They kept sending service people over who agreed it was not correct, but no one did anything about it. They were supposed to come over and meet with my wife to cover everything, appointment was made weeks in advance on her day off and the completely ghosted her without any communication..... could be the worst company I have ever dealt with, unprofessional and basically flat out liars.... would love to see them dispute any of this as i have the complete email chain..... Buyer beware!!!!
Stella Scoyne
Oct 15, 2021
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Very efficient, knowledgeable, timly. Each employees knows hers/his job well. Great communication. Highly recommend!
Don Irving
Oct 14, 2021
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Great communication from office. Justin, the tech, was courteous and very knowledgeable. He was very engaging and explained what he found. I would highly recommend this company.
