Duvall's Plumbing Heating & Air Conditioning

8103-B Centreville Rd
Manassas, VA 20111 703-368-8746
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Consumer Ratings for Duvall's Plumbing Heating & Air Conditioning — 147 Ratings

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Complaints for Duvall's Plumbing Heating & Air Conditioning

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Areas Served by Duvall's Plumbing Heating & Air Conditioning:

  • Alexandria
  • Arlington Co.
  • Fairfax Co.
  • Loudoun Co.
  • Prince William Co.

Equipment company services/installs:

  • Humidifiers
  • Ductless mini-split systems
  • Central air conditioners
  • Electric furnaces
  • Gas furnaces
  • Hot water heating systems
  • Hot water systems pipes & radiators
  • Heat pumps

Consumer Comments for Duvall's Plumbing Heating & Air Conditioning

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Consumer from MC LEAN, VA
Feb 19, 2026
I have been trying out Duvall this year after switching from my long term previous contractor. I had problems with low humidity during the extreme cold this winter and called to ask what I could do about it. Jay Duvall took my call himself and led me through some tests over the phone, and told me to change the system setting to "fan on" to help it humidify continuously. This improved the humidity but not as much as I'd like. So he came in person and explained the system to me in such clear terms that I understand my HVAC better than I ever have before. Now I know more ways to manage the humidifier that I already have, so I might not need to upgrade the humidifier. He will also send me an estimate in case these changes don't do enough. He could have saved his own time and made a quick profit by not explaining to me how to use the system better, and just write an estimate for a more powerful humidifer, wasting my money, the energy and the equipment, but instead he took the time to educate me so I could be a wiser consumer. He has earned my appreciation and loyalty. What a class act!!!
Consumer from MANASSAS, VA
Jan 23, 2026
Good with suggestions to save money on air filters and overall heating bill.
Consumer from HERNDON, VA
Oct 31, 2025
Highly recommend. We called them this summer when our A/C stopped working, expecting them to say that our heat pump needed to be replaced, since it was already several years old. Instead, they identified the part that had gone bad, had the part on hand in their truck, and replaced it on the spot. And our A/C now works flawlessly. Had the same experience with them a number of years ago with the same responsiveness. And we've gotten next-day service every time. No unnecessary repairs and a pleasure to work with.

...and 45 more consumer comments for Duvall's Plumbing Heating & Air Conditioning