HVAC Services Thurmont MD

Learn about all the heating and cooling services we offer!

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Our residential and commercial heating and air conditioning services in Frederick and Washington Counties include heat pumps, hot water boilers, oil heat, gas heat, geothermal systems, radiant floor heating, and more. Call 240-674-3100!

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! All of the systems we install are energy efficient, environmentally friendly, and easy to service and operate. We install systems with the highest efficiency possible with the environment the equipment has to work in. We design every new construction system with state-of-the-art HVAC load design software and have spent many hours in training learning how to design the best system for your dream house or remodel. We even install geothermal systems as well. From residential to light commercial, indoor air quality and temperature control, Cornerstone HVAC will be there to help!


HVAC Maintenance and Repair


New Installation and Replacement


Radiant Floor Heating


Central Heating




Ventilation and Air Conditioning Systems


Oil Heat


Heat Pumps and A/C


Geothermal Systems Installation


Hot Water Boilers, Steam Heating


Residential and Light Commercial Work


Gas Heat

Heating and Air Conditioning Contractors

If you are looking for a reputable heating and cooling contractor in Central Maryland, Cornerstone HVAC is your premier choice. We know that having the right people on the job is just as important as choosing the best equipment. Our HVAC professionals provide you with top quality equipment, skilled installation and an expert analysis of your comfort needs. We’re particularly proud of providing heating and air-conditioning systems that have earned the Good Housekeeping Seal. It’s one more assurance that, when you choose our products and our specialized technicians, you’re choosing quality.

Air Conditioning Repair

You depend on your air conditioner to keep you comfortable when temperatures rise. At CornerstoneHVAC, we offer all types of air conditioner repair and maintenance services to ensure your system is continuously running optimally. From seasonal AC tune-ups to emergency air conditioning repairs, no job is too small or large for our professionals.

Heating System Repair

We understand the stress of having to wait for a heating repair company. At Cornerstone HVAC of Thurmont, MD, we work hard to arrive fast and repair your furnace, boiler, oil and gas heat, and geothermal heating systems at affordable rates. We stand behind our work! Call 240-674-3100 to schedule your appointment today.

Heat Pumps

Heat pumps are centralized, forced air systems that can both heat and cool your home. This option can be a major benefit if you are looking for a new installation. We are heat pump experts. Rely on us to make sure you get the perfect heat pump solution for your needs. Our recommendations will fit your budget and lifestyle needs.

Geothermal Systems

A geothermal heat pump is far more efficient than conventional HVAC equipment and is recognized as the most environmentally responsible form of climate control by the Environmental Protection Agency. Rather than burn fuel to create warmth, a geothermal heat pump moves existing heat from one place to another, taking advantage of relatively constant underground temperatures.

Call Cornerstone HVAC today at 240-674-3100.