Service from a well trained professional

Our friendly customer service representatives are always ready to discuss your service needs and recommend the best course of action for your home and family. Give us a call to find out how we can help you breathe easier today.

Air Conditioning, AC Repair and Heating Contractor Fairfax, VA

At Donmar Heating & Cooling, we believe clean, comfortable air is a right, not a privilege, and we work tirelessly to help our friends and neighbors in the Fairfax area breathe easily. We have the heating and cooling systems you need to get through even the hottest summers and coolest winters, and our technicians have the skills, training and experience needed to keep those systems running at peak efficiency. Excellent service is our minimum standard at Donmar Heating & Cooling, and we hire only excellent technicians to perform that service. All of our HVAC professionals are factory-trained, licensed professionals, and most hold NATE certification. We supplement those extensive qualifications with ongoing seminars and workshops to keep all of our staff abreast of the latest trends in the constantly changing HVAC industry. [testimonialswidget_widget  keep_whitespace=true char_limit=250 min_height=180 minimum_length=100]   At Donmar Heating & Cooling, we strive to keep our customers as comfortable with our business practices as they are with our great heating and cooling systems. Every service visit is backed by our 25 years’ experience in the industry and A+ Better Business Bureau rating. We promise fast service and guaranteed quality, and we have been delivering just that since 1988. Our technicians arrive on time, maintain open communication throughout the project and always clean up the job site before they leave. From air conditioning repair to water heater replacement, we’re proud to be the Fairfax, Sterling, Alexandria, Gaithersburg and Bethesda area’s choice Carrier Factory Authorized Dealer and HVAC contractor, and we don’t plan on slowing down.

We take pride in offering one-stop access to all of our customers’ HVAC needs. Our services include:

  • Air conditioning service and repair
  • Heat pump installation and service
  • Geothermal system installation
  • Furnace installation, maintenance and repair
  • Water heater repair and replacement
  • Preventive maintenance service agreements
  • Humidifiers, air cleaners and purifiers
  • Ventilators and other indoor air quality products
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