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.

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Great Mills Heating and Air Conditioning, Inc.
Average rating:  
 12 reviews
 by Connie White
Outstanding business
City & State: Lexington Park

If I could give 100 ⭐️ I would. My ac went two months ago & I’ve been fighting for 2 months with an insurance company for a replacement/repair (home appliance insurance company which was horrendous). Roxanne & Kirk were so kind & patient and truly went above & beyond to help me. Never met them. Never used this company before & they worked endlessly with me & the insurance company to try and get a resolution. It took 2 entire months, numerous emails and calls. They did so much work to try and help me, even knowing the insurance was refusing to pay at every turn but that didn’t stop them. The moment I got the go ahead for replacement, I knew who was getting my business. If I could do more, I would. They ordered my unit Monday evening. It arrived Tuesday and it was installed Wednesday morning. They dispatched several technicians to my home and they were all very professional, prompt and extremely knowledgeable. I will sing high praises to anyone who will hear me. Great Mills HVAC has earned my future business for sure.

 by V.Thompson
Excellent Service
City & State: Great Mills, MD

I am so thankful for Great Mills Heating and Air Conditioning. My A/C stop working on a Thursday afternoon and I reported it and put in a claim with my Home Warranty. They still couldn't get anyone out late Friday afternoon so I called Great Mills HVAC. I spoke to Michelle and she was so compassionate and helpful. She was able to get a tech to my house on Monday morning. The A/C Tech, Ben was so awesome. He is polite, prompt, skilled & he walked me through everything he was doing and was so patient with me as I asked a zillion questions. It's hard to find good service these days, and I am forever grateful that it still exists.

 by Diana Dampier
Google Review
City & State: St Marys, MD

Good service

 by Kody Mattingly
Google Review
City & State: Calvert MD

We were very pleased with the timing of the service call and the Tech who came out was professional, very knowledgeable, and friendly!! We highly recommend!! Thanks fir the good service!!

 by Marie Dyson
Google Review
City & State: St Marys, MD

Positive: Professionalism, Punctuality, Quality, Responsiveness, Value
Kirk and Chelsea go above and beyond every time I have a issue. They are honest, and really do quality work!! I am sorry I had used someone else business, but for now on this is who I’m relying on
Services: Repair AC, AC maintenance

 by D Johnson
Google Review
City & State: St Marys, MD

The AC Techs were on time, courteous and professional.

 by Ken Minner
Google Review
City & State: St Marys, MD

Positive: Professionalism, Punctuality, Quality, Responsiveness, Value
Professional, knowledgeable and excellent work!
Service: HVAC maintenance

 by Sheila Feeney
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.

 by Ramzy
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!

 by Bree Daisy
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!

 by Jill Petrosillo
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.

 by Susan
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!!!!