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

Heating, Air Conditioning, & HVAC in Bethesda, MD

The One-Stop-Shop for All Your HVAC Needs

In order to make sure that the heating and cooling systems in your home are working in top condition, you need the best HVAC services available in the Bethesda, MD area. At Donmar Heating & Cooling, we have been helping our customers throughout Northern Virginia and Maryland for more than 30 years, and offer a myriad of cooling and heating systems to ensure complete comfort for everyone in your building. With a complete range of products and related service to choose, think of us as your "one-stop-shop" for nearly any HVAC need!

Some of the services that we offer include:

  • Installation and repair of water boilers and heaters
  • Installation, maintenance, and replacement of air conditioning systems
  • Accurate calculation of the heating/cooling requirements
  • Installation and cleaning of humidifiers
  • Heat pump, air purifiers installation and repair

Customized Service for Maximum System Efficiency

We understand that each system is different and that is why we customize our services to meet individual heating and air conditioning requirements, according to the specific needs of each customer. Working closely with homeowners owners, we start with accurately calculating the building consumption and then installing the HVAC of that capacity. For optimized efficiency, our technicians will calibrate the system so that the cooling or heating is maximized, while lowering the power consumption.

Carrier Factory Authorized Dealer

Our Bethesda, MD HVAC company is a Carrier Factory Authorized Dealer, which proves that we have maintained consistent high quality, brand loyalty, and customer satisfaction, among other qualifications. We understand the nuances of all Carrier products and ensure that the servicing of heat pumps, boilers, and air conditioners meets the set standards of the manufacturer.

Additionally all of our technicians are accredited with the prestigious NATE certification, the highest in the industry. We have the skill, expertise, tools, and training to help your HVAC heating and cooling systems work seamlessly throughout the year.

We can help residents and owners of any of the following areas:

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

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

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

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

  • “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.”

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


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 with Approved Credit

  • Quality Service With Honest Values

  • Affordable Service Management Agreements

  • Over 30 Years of HVAC Experience

  • We Are On Time, Every Time