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All County Air Conditioning & Heating
All County Air Conditioning is a father son company. Patrick Dennis has been in business for over 30 years and is the Assistant Dean at Nova Community College for HVAC. James Dennis has been working as an HVAC technician with his father for over 12 years. Together they have grown the business to what it is now; the business has grown so much they needed to relocate to a new office building.

All County Air Conditioning is located in Manassas Park on 9102 Industry Park Drive unit N. All employees have completed the HVAC program and are working towards an associate's degree in the Natural Science Department. Let All County Air Conditioning help you avoid unexpected and costly system failures with an annual maintenance contract.
Services
For over 25 years, All County Air Conditioning has been serving the Northern Virginia area with a commitment of excellence in service and value. We provide personalized service and affordable rates for residential and commercial as a class A contractor. All County Air Conditioning uses only the finest tools and products.
All County Air Conditioning has a wide selection of services and a highly qualified knowledgeable staff. I just wanted to pass along a big thanks for your same day service. Not only did you provide top of the line service when you installed my units and help me to understand the complexities of heating and cooling a hours, but it's also nice to know five years later thay you still treat me like a valued customer.
Reviews (3)
Pa W.
Pa W.
Jul 15, 2017
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Well this is embarrassing. I finally had a chance to actually use All Country Air Conditioning & Heating to service my A/C unit. The A/C would cool, then stop cooling (the line would freeze up). After I'd turn the unit completely off and let the line thaw, I could turn it back on and it would cool again. I believe All Country Air Conditioning & Heating diagnosed it correctly as a small leak in the system and that I needed 1 pound of R-22 (yes, the soon to be unobtainable Freon which keeps going up in price, but that's what my system uses). I was cautioned that I would be
Michael M.
Michael M.
Oct 08, 2015
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These guys installed plumbing during a home renovation I did in 2008 and almost every year since I've found installation issues. They installed a hydronic heating system as part of the remodel and I've just finished replacing most of the pipe work that they installed that caused the system to not work well. Mostly poorly routed piping, low flow issues, and flow balancing. After completing this I still had one radiator that was non-functional so I got into a crawlspace to see what the issue was. They had plumbed the supply and return for the radiator to the same pipe. So no flow
Karl S.
Karl S.
Sep 26, 2015
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I am absolutely thrilled with All County. I originally gave them a try when my normal HVAC company couldn't figure out why my HVAC system at our office was making a loud rattling sound. I had never had an issue with my previous company before, but even though they sent out their senior technician he seemed uninterested in solving the problem and said he could "try, but it might not work" to replace the electrical unit or something of the sorts...it would have been about $1,000. I said no and of course was charged a service fee.

I then called All County for a second opinion and