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 Northern Virginia & Maryland Customers Since 1990

Are you tired of dealing with an air conditioning unit that fails to maintain a comfortable indoor temperature? Is your current AC constantly breaking down or in frequent need of expensive repairs? The best solution might be replacing your current AC unit with a newly installed one.

Our expert Sterling air conditioner technicians from Donmar Heating, Cooling & Plumbing 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, even if we have to do a full system replacement and upgrade.

A few reasons why we’ve been making loyal customers since 1990:

Signs That Your Air Conditioner Needs to Be Replaced

There are some telltale signs that may indicate that your current cooling system should be replaced instead of extensively repaired. 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 an AC system replacement is encouraged:

  • Unit fails to maintain comfortable indoor conditions
  • 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 and the Montgomery County, Prince George’s County, Prince William’s County, and Loudoun County areas. You can check to see if we service your community by viewing our Service Areas page. We look forward to helping you with an AC replacement and new installation that keeps you and your family cool all year round!

Schedule an appointment by calling our offices at (703) 457-8676. A friendly team member 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
  • “We've been pleased with the units, but its your employees that have made the real impression - they've been uniformly fantastic!”

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

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

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

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

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

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

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

    Rodrigo
  • “I am thankful for Paul’s service and HIGHLY RECOMMEND Donmar Company to anyone with an HVAC issue!”

    K.J.

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