With over 30 years of HVAC experience, you can trust Cornerstone HVAC of Thurmont, MD to optimize your home's energy efficiency. Serving Frederick and Washington Counties, we go above and beyond to ensure you are comfortable indoors regardless of the weather. Extend the lifespan of your geothermal heat pump, hot water boilers, or central heating and cooling system! Schedule an inspection by calling us today at 240-674-3100. Our highly skilled technicians understand the harmful effects and energy waste of a broken HVAC system and we work relentlessly to keep you comfortable all year round!

Cornerstone HVAC sells the most reliable heating and air conditioning systems on the market. We are now a Trane HVAC Dealer along with being a New Bosch Accredited Dealer on their amazing 18 SEER Inverter HVAC systems. We are also a dedicated Rheem Dealer as well. We have a long history of providing Boiler and Oil Burner work and we install Weil McLain boilers and Burnham boilers as well. We have excellent relationships with our manufacturers, ensuring we get optimal pricing and rebate notifications - which we pass along to you, our valued customer!

What's new?

Its been a while, so how about a HVAC fun fact?!

Posted on Mar 03, 2021  •  Facebook

We are looking to add to our team an individual who can work as part of my installers crew for mechanical and wiring, charging etc. If you have enough experience in running service calls, that would be a plus. We are a small shop 2.5 man operation. If you're looking for away to get away from a hounding boss give us a call to set up a interview. We as a Company are dedicated to craftsmanship and decency in everything we do. We don't stop til the job is done. If you want to learn a trade and not..

Posted on Feb 25, 2021  •  Facebook

Things Consumers Need to understand these things. Not to mention the years as an Apprentice then Take the test to be a Journeyman for 5+ years, Then Take the full test to become a Master of your Trade, and Schooling, Tools and project development all plays a part on how we price a Job. We have to...

Posted on Jan 25, 2021  •  Facebook

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