Installations & Equipment Replacement
We proudly serve homeowners and businesses throughout Gaithersburg, Frederick, Southern Washington D.C., and surrounding Maryland communities within a 50-mile radius.
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High-Performance HVAC Systems for Comfort You Can Count On
Whether you’re building a new property or replacing an outdated unit, Dumars HVAC Services provides expert HVAC installations and equipment replacements designed for lasting comfort, energy efficiency, and dependable performance.
Central Air Conditioning Units
Central air conditioning systems are ideal for cooling your entire home or business with consistent, even airflow and reliable temperature control. At Dumars HVAC Services, we install and replace high-efficiency central A/C units that deliver powerful performance while helping to lower energy.
Gas & Electric Furnaces
Whether you prefer gas or electric, a reliable furnace is essential for staying warm during Maryland’s colder months. At Dumars HVAC Services, we install and replace high-performance gas and electric furnaces that offer dependable heat, improved energy efficiency, and quiet operation.
Why Choose Us?
At Dumars HVAC Services, we combine professional expertise with a customer-first approach to deliver HVAC solutions you can depend on. With over 8 years of hands-on experience, we are fully licensed in refrigeration and air conditioning and EPA 608 certified for safe refrigerant handling. We offer fast, friendly, and affordable service—available 24/7 for emergencies—and we treat your home or business with the same care we’d give our own.
Testimonials
“We needed a full HVAC replacement for our office, and Dumars HVAC handled it flawlessly. From consultation to installation, they were professional, efficient, and respectful of our workspace. Highly recommend them for any commercial HVAC needs!”
Sarah M.
“Our heat went out in the middle of the night, and I was panicking with a baby in the house. Dumars HVAC picked up immediately and arrived in under an hour. They fixed the issue quickly and didn’t overcharge. Their 24/7 service is no joke!”
James R.
“We had a new furnace and smart thermostat installed, and the whole process was smooth. The team was on time, neat, and explained how to use everything. Our home feels so much more comfortable, and our energy bills are already lower!”
Linda T.
“I’ve worked with a few HVAC companies in the past, but Dumars is by far the best. Their communication was excellent, prices were fair, and the quality of work exceeded expectations. I’ve already recommended them to my neighbors!”
Carlos D.
“They handled our seasonal maintenance and caught a problem before it turned into an emergency. I appreciate how thorough and honest they were. It’s hard to find dependable service these days, but Dumars HVAC definitely delivers.”
Monica S.
“I can’t say enough good things about Dumars HVAC Services. When our A/C stopped working on one of the hottest days of summer, they answered our call immediately and had a technician out within a few hours. The team was friendly, professional.!”
Nathan B.