Virginia & Maryland Heating & Air Conditioning
Make the Call for Comfort Your One-Stop Shop for Everything HVAC - In Prince William County!

Prince William County HVAC Services

Serving the Area for More than Two Decades

At Donmar Heating & Cooling, we have been a top HVAC contractor in Prince William County for more than two decades. Over these years, we have completed thousands of maintenance calls, repairs, new installations, and other services to make sure that our customers enjoy properly functioning systems and a comfortable indoor environment during every season of the year. Our company is proud to serve a diverse range of customers and customer needs, and is dedicated to finding the right solution that is custom-tailored to your situation!

Why choose us for your heating and cooling needs?

  • A team of technicians with extensive training and skill
  • A licensed, bonded, and insured company
  • Mobilized vans with the necessary equipment to handle almost any task
  • 24/7 emergency service available
  • Special financing options available with approved credit
  • An outstanding track record of satisfied customers

A Team of Highly Trained & Experienced Technicians

When you are looking for high levels of service from a Prince William County HVAC company, it is important to look at the skill and experience the technicians who will be caring for your system bring to the table. Our company hires only licensed and trained professionals who have passed a comprehensive background check. This ensures that the service they provide will meet the high standards we strive for every day on the job.

We are a Carrier Factory Authorized Dealer, and the majority of our technicians are NATE-certified. To summarize, this certification requires rigorous training and skill, and means that those who have it are some of the best in the business. In addition to this certification, our company itself continuously provides professional development seminars and workshops to our employees, so that you can benefit from an extremely high quality of workmanship!

Call us today in Virginia at 703.457.8676 or in Maryland at 301.250.1899 to request your HVAC service.

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

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

    Chris C.
  • “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
  • “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.”

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

    Rodrigo

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