Virginia & Maryland Heating, Air Conditioning & Plumbing
Make the Call for Comfort Your One-Stop Shop for Everything HVAC - In Potomac, MD!

Maintain, Repair, & Install Your Potomac HVAC System

More Than Two Decades of Experience in the Field

For more than two decades, our team at Donmar Heating & Cooling has been the market leader in theHVAC industry serving the Potomac, MD area. As the top HVAC contractor, we have garnered the attention and praise of our customers, and add new customers every year due to referrals.

We adhere to our basic goal of respecting customers and offering affordable yet quality services. This has led to phenomenal growth over the years, and to our company being selected as Carrier Authorized Factory Dealer, a recognition that only a few services get.

Our Potomac, MD HVAC company offers:

  • A comprehensive range of services to meet nearly any need
  • Affordable prices and special financing options with approved credit
  • A long track-record of successful jobs completed and satisfied customers
  • Customer-centric service that is focused on your unique needs

Well-Qualified Technicians Using Up-to-Date Products & Techniques

By hiring only the best-trained technicians in the HVAC industry, you can be certain that you are getting the highest-quality service possible. Our professional technicians have cleared all background tests, as mandatory by the state, and have NATE certification, the premium credential in the industry. They are not just knowledgeable but professionally trained and experienced. Additionally, comprehensive training programs and workshops are conducted to keep them abreast about the developments occurring in the field, allowing you to benefit from up-to-date products and techniques.

Count On the Industry-Leading Experts!

As a full service heating ventilation and air conditioning service, it is our goal to offer high-quality replacements and products to keep the environment at home and office pleasant. As proud Carrier Factory authorized dealer, we are experts on the leading brands in the industry and understand the nuances of every heating and cooling system. It is essential to accurately understand how each system works and if there is an issue, we know exactly what to do after a quick evaluation.

Learn more by calling us today at (703) 457-8676 for Virginia residents or 301-250-1899 for those who live 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!”

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

    Scott H.
  • “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