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

Montgomery County HVAC Company

Consistent Service & Customer Care with a Personal Touch

At Donmar Heating & Cooling, we have been providing the highest-quality HVAC services to Montgomery County and Northern Virginia for more than two decades, and have the wealth of experience, knowledge, skills, and tools to effectively assist you. Our business is dedicated to the 100% satisfaction of each customer, and committed to consistent quality-of-workmanship with a personal touch. Whether you are looking for brand-new installation, regularly scheduled maintenance to keep your system functioning well throughout the year, emergency repair, or anything in between, we are your one-stop HVAC shop!

Some of the advantages of choosing us for your Montgomery County HVAC needs include:

  • A BBB-Accredited with more than 30 years of experience in the HVAC industry
  • A comprehensive range of services to meet all your HVAC needs
  • NATE-certified technicians who are highly knowledgeable in repair, maintenance, and installation methods
  • A Carrier Factory Authorized Dealer that has won the Carrier Presidential Award for two years in a row in 2014 and 2015
  • Free replacement estimates
  • Participation in utility rebate programs of PEPCO and Dominion Power
  • A track record of successfully completed projects, as seen through numerous excellent reviews on Home Advisor and Customer Lobby
  • Special Financing Options with Approved Credit

Call Us Now to Get Your Free Estimate!

Each customer and each HVAC system that we serve in Montgomery County is unique, and has unique needs. We fully understand this, and custom-fit each of our services to ensure that you get the specific and quality care you deserve. For the latest and greatest products, techniques, and customer care, we are the place to go.

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

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

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

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

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

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

    Samia K.
  • “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 with Approved Credit

  • Quality Service With Honest Values

  • Affordable Service Management Agreements

  • Over 30 Years of HVAC Experience

  • We Are On Time, Every Time