Virginia & Maryland Heating & Air Conditioning
Looking to Minimize Your Utility Expenses Invest In a Gas Furnace, Today!

Sterling Gas Furnace Repair & Replacement

Quality Care for Your HVAC System in Maryland & Northern Virginia

Minimizing utility costs is a top priority for any homeowner, and for many, that means investing in a gas furnace. Systems powered by natural gas are efficient, powerful, and reliable heaters that will keep your home warm for years to come. At Donmar Heating & Cooling, we are proud to offer gas furnace repair and replacement as part of our comprehensive HVAC services offered throughout Virginia and Maryland, and located in Sterling.

Our New Installation Process

Every home has unique heating needs, and we are committed to finding a furnace that will meet those needs. Even when replacing an existing system, we will never just give you a gas furnace that is the same size as your old one. After all, it may have been improperly sized in the first place, or your home’s heating load may have changed. Instead, we will perform a full heat loss calculation, accounting for square footage, insulation, and other factors, to assess your home’s heating needs precisely.

Once we have a properly sized system in-hand, our installation experts will work diligently to get you your replacement as quickly as possible. As a Carrier Factory Authorized Dealer, we are experts on the manufacturer’s standards, and we see those standards as our absolute minimum requirements. We will do everything in our power to make sure any system we install is well-positioned to heat your home for years to come.

You may want to consider purchasing and installing a new gas furnace if you:

  • Have an old furnace that is on its last legs
  • Are interested in an energy-efficient upgrade for your home
  • Are constructing a new home, and need a whole heating system for it

Gas Furnace Repair

While gas furnaces generally require a little less maintenance than oil furnaces, even the best natural gas furnaces are prone to occasional issues. When problems do emerge, our repair team is ready to step in. Since losing your heat in the middle of winter can be quite dangerous, we offer 24/7 emergency repair services, and we never charge extra for an evening or weekend visit.

Your furnace may not respect your schedule, but our technicians will!

A Team of Highly-Trained & Qualified Technicians at Your Service

Our technicians hold the HVAC industry’s most highly regarded credential: NATE certification. That means they have completed rigorous training and are fully familiar with the latest techniques and best practices. We send them out in vans loaded with enough parts and equipment to complete most jobs in a single visit, and if that’s not enough, we have access to even more parts through the Carrier network.

Because your gas furnace plays such a vital role in keeping you comfortable at home, we take our work very seriously. Our Sterling, VA gas furnace repair technicians will arrive on time for every repair visit and lay out both repair and replacement options to help you make an informed decision. We will maintain open communication throughout the repair process and always clean up the job site before we leave the home.

For more information on gas furnaces, and to schedule a free estimate, call our Sterling, VA office today at (703) 457-8676 (Virginia) or 301-250-1899 (Maryland)!

Don't Just Take Our Word for It!

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

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

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

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

    Chris C.
  • “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.”

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

    Natalie M.

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