St. Marys and Calvert County Maryland HVAC Services   ♦   We Make Your Air Flow!

Read or leave a review below of Great Mills Heating and Air Conditioning, lnc. – a HVAC, home, residential, commercial, Heating Air Conditioning HVAC contractor servicing Heat Pumps, Gas, propane, Oil, Furnaces, Water Heaters, humidifiers, Burner Service, Boilers in So MD, Southern Maryland’s St. Marys and Southern Calvert County areas.

Great Mills Heating and Air Conditioning Google Reviews
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Great Mills Heating and Air Conditioning, Inc.
Average rating:  
 5 reviews
bySheila Feeney onGreat Mills Heating and Air Conditioning, Inc.
Google Review
City & State: St Marys MD

I have been dealing with Great Mills Heating/AC for over 6 years. The do a good job and are reasonably priced. Their personnel are both professional and personable.

byRamzy onGreat Mills Heating and Air Conditioning, Inc.
Google Review
City & State: St Marys, MD

Very friendly customer service and fast! Technicians were professional, showed up early, and diagnosed the issue very quickly. I couldn't be happier!

byBree Daisy onGreat Mills Heating and Air Conditioning, Inc.
Google Review
City & State: St Marys, MD

I called GM HVAC due to smelling gas the second time we ran our heat for the season and they had a technician out to my home within 20 minutes. He completed the task within an hour and sealed our leak very well. The tech was friendly, polite, and respectful. Highly recommend!

byJill Petrosillo onGreat Mills Heating and Air Conditioning, Inc.
Google Review
City & State: St Marys, MD

These guys were great! Honest and to the point. They didn’t try to pressure you into buying things like the other guys.

bySusan onGreat Mills Heating and Air Conditioning, Inc.
Google Review
City & State: Southern MD

Had an emergency call past hours on Friday. Kirk came to the house and switched out the exterior condensate pump with a new one. Old pump quit and it kept turning off the AC which is what is supposed to happen but condensate continued to gather in a tub I put their. Kirk took out the old pump and installed and tested. ALL GOOD!!!!