Carrier logo

Emergency Services 7 Days a Week


Virginia Office


Maryland Office

HVAC Replacements in Sterling, VA

Serving Customers Throughout Northern Virginia & Maryland Since 1990

Are you tired of dealing with an air conditioning or heating unit that fails to maintain comfortable indoor air conditions? Is your current A/C or furnace constantly breaking down or in need of constant expensive repairs? Our expert Sterling HVAC replacement technicians are committed to helping homeowners and business owners throughout Northern Virginia and Maryland experience the best in indoor air quality!

We proudly offer emergency services 7 days a week. Give one of our offices a call and we can come out to your home or business and get your indoor climate back to normal in no time.

Contact Donmar Heating and Cooling at (703) 457-8676! Schedule an appointment or request a service to get started.

Delivering Quality Products Since 1990

Signs that Indicate that Your Heating or A/C Unit Needs to Replaced

There are some tell-tale signs that may indicate that your current indoor heating or cooling system should be replaced. Though overall age and use of the unit can contribute to decreased performance or energy efficiency, other red flags may indicate that a unit needs to be replaced as soon as possible.

  • When a replacement is encouraged:
  • Unit fails to maintain comfortable indoor conditions
  • Unable to generate consistent temperatures
  • Leaks or strange noises coming from the unit
  • Excessive energy bills or sudden increase in monthly cost
  • Frequent repairs with no signs of performance improvement
  • Potential cost of repair exceeds the cost of replacement

Time for Replacement? Call Us at (703) 457-8676 for a Quote!

We proudly serve customers throughout Northern Virginia and Maryland, including Sterling, VA and the Montgomery County, Prince George’s County, Prince William’s County, and Loudoun County areas. Discover if we service your community or nearby surrounding area by viewing our Areas of Service page.

Schedule an appointment by calling our offices at (703) 457-8676. One of our friendly team members can provide a comprehensive estimate based on your unique needs and budget.