Donmar Co Inc

Heating and Air

22821 Silverbrook Center Drive
Suite 130
Sterling, VA 20166-4377

Mon - Fri: 7:00AM - 10:00PM

Sat: 7:00AM - 5:00PM

Sun: 9:00AM - 5:00PM


Air Conditioning Company in

Fairfax, VA

For over 25 years, Donmar Heating & Cooling has been a top HVAC contractor in the Fairfax area. We've provided service to over fourteen thousand customers over the years, and our business continues to grow primarily through referrals from satisfied home and business owners. Our business model is simple: provide excellent service at an affordable price and treat every customer with respect. Our high standards have resulted in recognition from Carrier, and we are proud to be one of their distinguished factory authorized dealer. Because every home?s heating and cooling needs are unique, we believe in presenting all available options to every customer and finding the right comfort solution for each customer.

Our Technicians

Our business is built on professional-quality service, and it takes top-notch technicians to meet our high standards. We hire only trained and licensed professionals who pass full background checks. As a Carrier Factory Authorized Dealer, the majority of our technicians must hold NATE certification, the HVAC industry?s premier credential. NATE-certified contractors are simply the best at what they do, and we supplement their extensive knowledge with ongoing professional development seminars and workshops.

Because our employees are so vital to our business, we believe in treating them like family. Most of our technicians have been with us for seven or more years. Our management team promotes a drug-free, safe working environment and remains committed to training and caring for all of our staff.

Our Services

As a full-service heating, ventilation and air conditioning company, we have all the systems you need to stay cool and comfortable throughout the year. We?re proud to be a Carrier Factory Authorized Dealer, which means we?re experts on one of the industry?s leading brands and know exactly how to make sure every system we install meets the manufacturer?s high standards. Our HVAC experts will assess your home?s heating or cooling load, then work with you to find a system that can shoulder that load at an affordable price.

Even the best systems need ongoing maintenance to keep running at peak efficiency, and our affordable annual service agreements are tailor-made for just that purpose. When your air conditioner shuts down or your furnace won?t start, our repair team is ready to step in and fix the problem right away. Again, we believe in keeping your options open, so we?ll clearly explain the costs and benefits of both repair and replacement instead of pushing for one or the other.

We?re big believers in green technology, energy efficiency and clean air. Federal tax credits of up to $500 are available for homeowners who upgrade to greener technology, and our experts are ready to help you pick out a system that will qualify. Since the HVAC industry is constantly working to make more efficient systems, we offer plenty of discounts and specials to help our friends and neighbors upgrade at a price they can afford.

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
  • Air Conditioning Installation
  • Air Conditioning Maintenance
  • Air Duct Evaluation
  • Air Quality Evaluation
  • Energy Efficiency
  • Forced Air Systems
  • Gas Force Air
  • HVAC
  • Heater Installation
  • Heater Maintenance
  • Heating
  • Home Energy Evaluation
  • Preventative Maintenance
  • Refrigeration
  • Tankless Water Heaters


  • English


  • American Express
  • Cash
  • Check
  • Debit
  • Discover
  • Financing
  • Mastercard
  • PayPal
  • Visa

Certifications & Memberships

Carrier Residential - Factory Authorized Dealer Carrier North American Technician Excellence