Virginia & Maryland Heating, Air Conditioning & Plumbing
Don't Suffer through the Cold Weather Keep Your Family Warm All Winter Long

Sterling, VA Heating Services

Keeping You Warm During the Winter Months

Having heat and hot water in your home isn’t just a luxury, it’s a necessity for modern living. The Northern Virginia winter can bring significant cold, and you will need a great furnace, boiler or heat pump to keep your family warm and comfortable all night long and all winter long.

At Donmar Heating & Cooling, we are professional heating contractors in Sterling, and always happy to take care of our friends’ and neighbors’ home heating needs. Our heating Sterling & Rockville heating service technicians are NATE-certified and can assess your heating problems in a prompt and professional manner.

For your free heating repair estimate, call Donmar Heating & Cooling today at (703) 457-8676!

Why Perform Regular Heating Maintenance?

While it may seem like a hassle to schedule regular maintenance for your heating system, it can actually save you time and money in the long run. When you have a properly working heating system, it can be extremely beneficial.

Some of the benefits of a properly maintained and functioning heating system include:

  • Reducing the amount you pay for monthly utility bills
  • Reducing the problems or future problems
  • Extending the life of your current system
  • Higher quality, more breathable air

Heating Sales & Installation

From boilers and furnaces to heat pumps, there is a dizzying array of heating systems available to homeowners today, and each comes in several different variations. We are prepared to help you select the best system for your home, whether it is an upflow furnace in the basement, an energy-efficient heat pump that will pull double duty, or a gas boiler that will facilitate heat flow throughout your home.

Every home’s heating needs are different, and we acknowledge that difference at the start of each project. Before giving an estimate, we will perform a full heat loss calculation to assess exactly how much heating power your home requires. Once we have the results in hand, we will work with you to pick out a system that will meet those heating needs with no wasted power, which means more money stays in your pocket.

As a Carrier Factory Authorized Dealer, we are fully familiar with the manufacturer’s standards and know how to make sure every system we install meets or exceeds those standards. Our Virginia HVAC services team has a long history of customer satisfaction to prove that we take this commitment very seriously.

Heating Repairs & Emergency Repairs in Sterling

If your furnace refuses to start in the middle of January or your heat pump shuts down on a cold February day, there is no need to panic. Our Virginia and Maryland HVAC repair experts are available seven days a week from 7 a.m. to 10 p.m. to come to your home, resolve the issue, and keep your family safe.

We know that heating problems don’t respect your schedule. Because of this, we offer convenient business hours every day so you don’t ever have to worry about an extra charge for a weekend or evening visit.

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Annual Heating System Maintenance Agreements

We believe the best approach to heating problems is prevention. With an annual maintenance agreement, we can come to your home at the start of the heating season and make sure your boiler, furnace or heat pump is running properly. We’ll assess any small, emerging issues and fix them before they turn into major ones, saving you money down the road on expensive repairs. Moreover, our technicians will make small calibration adjustments to maximize fuel efficiency, which means you will see an immediate drop in your utility costs.

The Premier Professionals in the Heating Industry

Our Virginia and Maryland heating repair experts hold NATE certification, which is the HVAC industry’s premier certification for service professionals. NATE-certified contractors are trained to maintain and repair all makes and models of heating equipment, and they have the experience needed to analyze and resolve any problem. On top of that training, we use ongoing professional development seminars to keep our technicians abreast of the latest techniques and best practices.

For a free estimate, contact our Sterling, VA HVAC company today at (703) 457-8676 in Virginia or 301-250-1899 in Maryland!

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!”

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

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

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

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

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

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

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

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


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