Virginia & Maryland Heating, Air Conditioning & Plumbing
A/C or Heating Units Failing? Available 7 Days a Week for Your Immediate Needs!

AC Replacement & Installation in Sterling

Serving Customers Throughout Northern Virginia & Maryland Since 1990

Are you tired of dealing with an air conditioning unit that fails to maintain comfortable indoor air conditions? Is your current AC constantly breaking down or in need of constant expensive repairs? Our expert Sterling air conditioner technicians are committed to helping homeowners 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 and get your indoor climate back to normal in no time.

Donmar Heating and Cooling has been creating loyal customers since 1990 for many reasons:

Signs That Your Air Conditioner Needs to Be Replaced

There are some tell-tale signs that may indicate that your current 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 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.

Don't Just Take Our Word for It!

See What Our Customers Have to Say About Our Service
  • “I am thankful for Paul’s service and HIGHLY RECOMMEND Donmar Company to anyone with an HVAC issue!”

  • “Donmar Company defines customer service excellence to a higher level.”

    Scott H.
  • “We've been pleased with the units, but its your employees that have made the real impression - they've been uniformly fantastic!”

  • “Really appreciate your crew. They answered all my questions and concerns, and the work appears to be impeccable!”

    Jeffrey N.
  • “They are honest and straightforward with their recommendations and always give us various options. ”

    Samia K.
  • “It is so hard to find a trustworthy AC repair company and I think i have finally found it.”

  • “Your customer service is outstanding and everyone that I spoke to or met in person speaks to the nature of your company.”

  • “This company is very attentive to the customer and respond to their concerns quickly.”

    Natalie M.
  • “Great company — replaced my furnace very efficiently and effectively. ”

    Chris C.

Creating Happy Customers Since 1990

Why We Are the #1 Trusted HVAC Company in Northern Virginia
  • Emergency HVAC Services 7 Days a Week

  • NATE Certified Technicians

  • Offering Free Estimates On Replacements

  • Flexible Financing Options

  • Quality Service With Honest Values

  • Affordable Service Management Agreements

  • Over 25 Years of HVAC Experience

  • We Are On Time, Every Time