Business Details
33 Years
experience
Emergency
services
Trusted HVAC Solutions in New England
Since 1993, Key Heating & Air Conditioning has provided energy-efficient HVAC solutions to New England homeowners. As a family-owned, award-winning business, we specialize in heating, cooling, geothermal systems, and air quality services, combining technical expertise with exceptional customer service. Our team of factory-trained technicians brings over 150 years of combined experience, with some members serving the company for more than two decades. We prioritize ongoing training to maintain cutting-edge knowledge of HVAC technology and offer 24/7 emergency service for urgent needs.Our commitment to environmental responsibility includes recycling programs, EPA-certified refrigerant handling, and promoting high-efficiency SEER equipment. Recognized by the Better Business Bureau with an A+ rating, we guarantee customer satisfaction through free energy assessments, transparent recommendations, and financing options for system upgrades. Our community-focused approach extends to employee engagement initiatives and local volunteering efforts.
Services
HVAC Repair
Geothermal Systems
Air Quality Solutions
Emergency Service
System Maintenance
Ductless Installation
Energy Audits
Thermostat Replacement
Humidifier Installation
Home Generator Services
Details
- Year established: 1993
Highlights and features
- 30+ years of HVAC experience serving New England
- 24/7 emergency service available
- Factory-trained, EPA-certified technicians
- BBB A+ accredited business
- Financing options for system upgrades
Associations and certifications
- Better Business Bureau
- EPA-certified
What people say
Great Support
Very knowledgeable
Outstanding
Professional job
Best I have had
Services
HVAC Repair
Our factory-trained technicians provide prompt diagnosis and repair of heating and cooling systems. With 30+ years of experience, we handle all brands and models, offering 24/7 emergency service for urgent HVAC failures. Our team uses advanced diagnostic tools to identify issues quickly and efficiently.
Geothermal Systems
We design and install geothermal heating and cooling systems that reduce energy emissions by up to 70%. Our experts help homeowners qualify for federal tax credits covering 30% of installation costs through 2032. Systems utilize earth's constant temperature for efficient climate control.
Air Quality Solutions
Improve home air quality with EPA-certified equipment including HEPA filters, UV purifiers, and whole-house humidifiers. Our specialists recommend solutions based on comprehensive indoor air assessments, addressing allergens, humidity, and ventilation needs for healthier living environments.
System Maintenance
Our Safety & Efficiency Membership provides year-round maintenance for HVAC systems. Regular service includes equipment inspections, filter replacements, and performance optimizations that extend system lifespan and maintain manufacturer warranties while ensuring peak energy efficiency.
Emergency Service
Available 24 hours a day, 7 days a week for urgent HVAC failures. Our rapid response team handles critical heating and cooling emergencies, with technicians equipped to provide temporary solutions and schedule permanent repairs within 24 hours of initial contact.
Questions
What HVAC services do you offer?
We provide complete HVAC services including installation, repair, and maintenance for heating, cooling, and air quality systems, plus geothermal solutions and emergency service.
Do you offer financing options?
Yes, we offer financing through Rheem, Mitsubishi, and other partners with approved credit for system replacements and upgrades.
Are you available for emergencies?
Our 24/7 emergency service responds to urgent HVAC failures with rapid diagnosis and temporary solutions followed by permanent repairs.
What areas do you serve?
We serve NH Seacoast, Lakes Region, and Southern Maine, with two locations in Exeter and Alton, NH.
Are you BBB accredited?
Yes, we maintain an A+ rating with the Better Business Bureau and follow EPA-certified environmental practices.
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