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Emergency Services 7 Days a Week


Virginia Office


Maryland Office

Expert Sterling HVAC Repair Services

Call Donmar Heating & Cooling for a Quote: (703) 457-8676

Having reliable heating or cooling in your home or business is not just about indoor air quality and comfort – it’s also about safety. Our NATE Certified HVAC experts can diagnose any type of HVAC issue and apply a cost-conscious, effective, and energy efficient remedy within your budget and timeframe. Whether your unit has frozen due to cold temperatures, is not running efficiently, or is creating frequent temperature changes, we can address the issue and help resolve the problem right away. We proudly serve businesses and residents in VA and MD.

We’re proud to be a Carrier Factory Authorized Dealer, which means we’ve met high standards of customer satisfaction and technical excellence. Most of our technicians are NATE certified, which means we are fully qualified to service and repair all makes and models of HVAC equipment. As one of our area’s top HVAC contractors, we are committed to maintaining the same high level of service that earned our factory authorization in the first place.

If you would like to schedule a repair service, call us at (703) 457-8676.

Delivering Quality Products Since 1990

Offering Transparent Prices So You Always Know What You’re Paying for

In some rare cases, constant repair costs than actually end up exceeding the cost of replacement. As HVAC technicians in Sterling and serving Northern Virginia and Maryland, we are always upfront and honest about our prices, and our technicians always work on flat rates for your peace of mind. Because we pride ourselves on transparency and customer satisfaction, we will be honest and thorough in our diagnosis of your HVAC problem. If a unit replacement would be more cost-conscious for your current situation, we will inform you of all options we can possibly take to remedy your indoor air problem.

Have an HVAC emergency? Are you in need of one of our NATE Certified Technicians immediately? We proudly offer emergency services 7 days a week. We would be happy to come out to your home or business and assess the situation hassle-free. We service a wide range of areas throughout Northern Virginia and Maryland.

Contact Donmar Heating and Cooling in Sterling, VA at (703) 457-8676. We offer competitive service maintenance agreements and Special Financing Options with Approved Credit