Request an AppointmentA Sterling Reputation and All of The Best Brands

For more than two decades, Key Heating & Air Conditioning, Inc., has been the gold standard for homeowners who want to have the best residential heating and cooling systems installed in their homes.

Count on our reputation and our team of qualified service technicians for all of your heating, air conditioning and air quality system needs.

We carry an array of top brands and install quality heating and cooling systems in communities throughout New England. Give us a call today at 603-436-8811.


Custom Sheet Metal Fabrication Available

Full sheet metal shop offering custom fabrication and installation. Custom Sheet Metal Fabricator Custom Sizing Chimney Caps Call us or contact us today to learn more about our locally-owned New Hampshire company’s capabilities in sheet metal fabrication and installation.

Installation Department

Delivering the Best Products Request an Appointment For more than 20 years, Key Heating & Air Conditioning, Inc., has been in the business of helping homeowners find the best residential heating and cooling systems for their homes. From free home energy assessments to comprehensive maintenance and the installation of all types of systems, we are […]

Excellent Payment Options Available!

Key Heating & Air Conditioning, Inc. has teamed up with Synchrony Financial to offer promotional financing options when your purchase is made with a Mitsubishi Electric credit card issued by Synchrony Bank.  This card may be used for  all the HVAC brands Key Heating & Air Conditioning install & service.

Synchrony Bank (formerly GE Capital Retail Finance) is one of the premier consumer financial services companies in the United States with over 80 years of retail heritage, and today is the largest provider of private label credit cards in the United States2.

Synchrony Bank can provide you with promotional financing options for major purchases, offering you a budget-friendly way to help you get what you really want or need. Expand your purchasing power and convenience with:

  • A simple application process, and fast credit decisions
  • Unsecured, revolving credit lines
  • Open credit line for future purchases
  • Promotional financing options1
  • Convenient monthly payment options
  • On-line account management

To learn more about promotional financing options from Synchrony Financial CLICK HERE.


Please Contact to Apply Today:
Marie Mango at 603-436-8811 or 

1Subject to credit approval. Minimum monthly payments required. See dealer for details.

2Based on purchase volume and receivables.