Lexington Park HVAC Company
Great Mills Heating & Air Conditioning delivers top-tier HVAC services to homeowners in Lexington Park and throughout St. Mary’s County. Founded in 1972, our family-owned business has built a reputation for excellence, professionalism, and dependable service. We’re proud of the good reviews so many past customers have given us, and we welcome the opportunity to prove ourselves to you next.
Our technicians are factory-trained, NATE-certified, and fully licensed and insured. We expect that every installation, repair, and maintenance service we provide will be performed to the highest standard, and we back that up with a strong warranty.
Homeowners can turn to us for help with services like these:
- AC replacement and installation
- AC service and maintenance
- AC repair
- Heating replacement and installation
- Heat pumps
- Geothermal systems
- Furnace repair
- Water heaters
- Indoor air quality
- Mini-splits
Customer satisfaction is at the heart of everything we do. If emergencies arise, you can rely on our 24/7 availability to address urgent HVAC concerns without delay. For non-emergency requests, we still strive to offer same-day scheduling, respecting your time and prioritizing your comfort.
We Strive to Make Our Services Affordable
As local homeowners ourselves, we know that HVAC projects can cause significant financial stress. We aim to make our services more accessible through flexible financing options and payment plans. Whether it’s handling an unexpected repair or investing in a new, energy-efficient system, we work with you to find solutions that align with your budget.
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Same-Day Service AvailableDon't wait weeks for an appointment. Book us same-day!
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Offering 100% Free QuotesGet started by giving us a call and setting up a free estimate.
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24/7 HVAC ServiceDon't stress about weekday bookings or office hours. We're available on weekends and offer emergency services.
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Licensed & InsuredEntrust your HVAC needs to licensed, insured professionals.
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Available for Emergency HelpGet the immediate help you need, whenever you need it.
Hear From Our Happy Customers
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My go to for HVAC!
“I have used them for my rentals, and referred them for business clients. The customer service on the phone is always helpful, and they go over & above for customers.”Lynda -
An honest company finally!
“Professional and didn't try to make me feel like more was needed than just a repair. I'm happy to have found an honest company finally!!”Gail -
Don't call anyone else!
“We've been doing business with Great Mills HVAC for over 15 years, and their service is always quick, professional, and friendly.”Bill -
Emergency response was amazing!
“Great Mills HVAC was quick to respond to my emergency call for repair. The problem was quickly discovered and solved on site.”Shirley -
We highly recommend Great Mills Heating & A.C.
“We have been doing business with Great Mills Heating & A.C. since we built our house in 1997. They are professional, polite, courteous, and reasonably priced.”Ted -
I HIGHLY RECOMMEND Great Mills Heating and Air Conditioning.
“GM definitely earned a 5-star rating and not just for the last job but for all the many jobs they've done for me in the past 25 years.”Ray -
Friendly, efficient, timely, and reasonably priced!
“Great Mills Heating and Air just installed my hot water heater and installed my HVAC system 4 years ago. I have been impressed with them both times.”Kathryn -
Fantastic experience with Great Mills.
“The service team was fast, professional, and punctual. I needed a quick adjustment within a couple of weeks and they sent a tech out, same-day, without any resistance.”Adam
Call Today for Your Appointment
At Great Mills Heating & Air Conditioning, your comfort is our mission, and your peace of mind is our priority. With more than five decades of experience, recognized technical knowledge, and a customer-first approach, we are proud to be a trusted HVAC partner for homeowners throughout the Lexington Park area. From heating solutions in winter to cooling systems in summer, we’re here to keep your home comfortable year-round.
Call (301) 381-2679 or contact us online to get a free estimate.
