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Emergency Services 7 Days a Week


Virginia Office


Maryland Office

Why Hire Our Virginia & Maryland HVAC Company?

Providing High-Quality Heating, Cooling, & Vent Services

Donmar Company was started with three two major goals in mind: to solve client’s problems and improve their indoor comfort. We are proud of the business that we built and we always strive to deliver consistent quality with a personal touch.

The Experience to Help Your Home or Business

We’ve been in the HVAC business for 26 years and counting. There is nothing in the residential and light commercial HVAC business that we haven’t seen or done. This experience combined with progressive training on the latest products ensure that our Virginia and Maryland HVAC experts are delivering a quality product and service each and every time.

  • Our experience includes:
  • Assisting over 14,000 clients
  • Writing over 71,000 invoices
  • Performing more than 8,500 new installations

Donmar Company: A Cut Above in the HVAC Industry

We love what we do and it shows in our work. We have little turnover and you will usually see the same technicians year after year keeping your equipment in top shape. Our lead installation foreman has been with us 14 years now. We are a Carrier Factory Authorized dealer and have won the Carrier Presidential award for two years in a row, in both 2014 and 2015.

Our goal is to solve your HVAC needs with the least amount of fuss as possible. To do this, we:

  • Are always on time
  • Offer all options
  • Deliver quickly so you can get back to your life

Affordable Energy Solutions

Not every family has several thousand dollars in emergency funds to cover the cost of a replacement HVAC system, so we have special 60 month financing available with approved credit to help spread out the cost.

We can offer instant utility rebates rather than having you file for yourself. Service calls are free with repair.

Our licensed, insured, and NATE certified technicians also offer free replacement estimates, affordable maintenance agreements, and we are BBB Accredited business so you can trust that you are getting the system you need at a price you can afford.

Call our HVAC professionals today in Virginia at 703.457.8676 or Maryland at 301.250.1899 to schedule your service today.