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HVAC Unlimited, Inc.

HVAC Services in Fairfax, VA

See our Fairfax customer reviews below

Residents of Fairfax rely on heating and cooling systems both in order to keep up with our variable and often unpredictable weather. That means when something goes wrong with your system you need service specialists with top-notch skill and training. Whether you’re looking for leading repair services, a new installation, or routine HVAC tune-ups and maintenance, you’ll find the quality and reliability you need with HVAC Unlimited.

For comprehensive heating and cooling services in Fairfax Station, Mantua, Penderwood, and the surrounding areas of Fairfax County—contact HVAC Unlimited! You can reach us online or by calling 703-493-1200!

Fairfax Cooling Services

For any of your cooling system needs in Fairfax, HVAC Unlimited offers a full array of services, from repairs to installations and replacements. Virginia summers are notoriously hot and humid, and you don’t want to get stuck in that heat with a broken air conditioner! We are here to help 24/7, offering the following cooling services to the Fairfax, VA area:

If your AC won’t turn on or is causing you problems, don’t hesitate to call us at 703-493-1200!

Fairfax Heating Services

If you’ve ever had the heat go out in the middle of a Virginia winter, you know how much a working heating system is worth. Whether you’re shopping for a newer, more energy-efficient heating system, or you need repairs on your existing one—we’re here to help! We offer the following heating services in Fairfax neighborhoods:

Choose HVAC Unlimited for your furnace, heat pump, and boiler repair services in Northern VA! 

Have A Leak? We Now Offer Plumbing Services in Fairfax, VA

We’re now your one-stop shop for the Fairfax area’s HVAC and plumbing services! If you are in need of pipe repair or water heater installation, our expert plumbers are here to serve you. Thorough training and years of experience has prepared our plumbing professionals to address the following residential and commercial plumbing issues:

Call us at 703-493-1200 whenever you have a plumbing emergency. We are here for you 24/7!

Fairfax Commercial HVAC Replacement, Repairs & Installation

Fairfax is a great place to work, but your employees need a cool, comfortable workplace to stay productive throughout the year. That means you need great commercial HVAC systems to keep your office that way. If your business has an older system that is developing problems, you want to start shopping for a new, more energy-efficient system. By making an investment in a commercial HVAC installation, you’ll no longer need to empty your wallet for constant HVAC repairs—and you could save money on your energy bills as well!

Residential & Commercial HVAC in Northern VA

The certified and licensed service professionals at HVAC Unlimited begin every single service with a comprehensive inspection of your home or business heating and cooling systems. By establishing the issue at hand we can offer solutions that save you time and money while also boosting comfort! We know it can get warm in the summer, plus winters that can go well below freezing, so you want systems you can trust.

Whether it’s an AC installation or a furnace repair in the Fairfax area, our experts go the extra mile to ensure our services offer absolute solutions and peerless results. Whether you’re looking for new equipment, are in need of emergency HVAC or plumbing repair, or just want to set up a service agreement—we’re the experts able and happy to meet your needs.

Contact us today to get in touch with our specialists by dialing 703-493-1200 or by reaching us online!

Local Reviews
for Fairfax, VA

Rated 4.9 out of 5 stars based on 116 customer reviews

Map of Fairfax, VA

Great Service, Took Time to Explain Everything




Jeremy showed up on-time and was very professional. He took the time to walk me through everything he was checking as part of the routine maintenance check. As a new, first-time homeowner, this was a very valuable experience for me. I now know what to keep an eye on in the future and how best to maintain my HVAC system to maximize it's useful life. I highly recommend Jeremy.


Map of Fairfax, VA

Excellent service




He quickly diagnosed the problem and explained the options that I had..He also clearly outlined the costs associated with a replacement water heater.. He made clear arrangements for follow-on service.


Map of Fairfax, VA

100% Satisfied




Calling a service person for a job can be difficult for many reasons. Jeremy was truly a diamond in the rough. He came on time and was extremely pleasant from the get go. During his inspection of the HVAC unit he found multiple obvious issues which he resolved without difficulty. He showed me the problems which I could easily appreciate. He performed only the necessary work. He appeared to be very honest and reliable. I would not hesitate to call him again for future issues. In fact I plan to call for his services soon for another job.


Map of Fairfax, VA

Great customer service.




Daniel was very informative and able to answer my questions on proper care and maintenance of my HVAC unit.


Map of Fairfax, VA

Great service and a knowledgeable young man who spent a lot of time answering our questions, etc.




We felt very comfortable with having Jeremy service our HVAC unit as he was familiar with the Infinity Series on our Carrier system which we had lots of questions about. He called while en route to estimate his time of arrival which was great as most companies do not do this!


Map of Fairfax, VA

Jeremy is simply the best HVAC guy!





Map of Fairfax, VA

Always reliable




Servicemen always explain problem


Map of Fairfax, VA

Great Service




5 stars


Map of Fairfax, VA

Great service




Very professional. The repairman was very patient and detailed.


Map of Fairfax, VA

Friendly Courteous Service




Performed a thorough check up of my furnace and A/C and explained why I needed to replace a component. Now I have peace of mind that my A/C will operate when we have very hot days this summer.


Awesome technician, fantastic service!




Daniel was great! Despite it being a Saturday, he was able to make it out and get our water heater up and running a couple hours after we initially called it in. Very friendly and solved the problem quickly!


Great service





Professional guys, excellent service!




Thrilled that HVAC is now offering plumbing services! Jeff Hood replaced our really old kitchen faucet, did an amazing job, and even cleaned up after. Thank you!


noise in vent




was told when i called it in that he would arrive in the morning, didn't show up until afternoon, but always good service with jeremy


Great job, as usual!




I know I can count on HVAC Unlimited to do a great job. Jeremy really knows his stuff and always figures out the best way to solve issues that crop up.


Great Customer Service




I thought Jeremy did a great job explaining all the details about my HVAC system. As a new customer, he did a thorough inspection of my system and found the issue with my AC unit capacitor, which needed replacement. He fixed it quickly and professionally. Great service!


good service, Jeremy knew what he was doing. He explained to me what he was doing. Best of all nothing was wrong with the air conditiong unit.





Great Service!




Awesome company!


Jeremy is awesome





Exceptional service, Amazing Technician!




Jeremy was fantastic today! Not only was he extremely knowledgeable when it came to assessing what repairs needed to be done with regard to our water heater, but he was also exceptionally friendly.


Great Customer Service




William Campbell was very professional. Knows what he is doing and gave good advice.


Great customer service!




Jermaine was awesome as always! He calls ahead to give you an ETA on when he's arriving and then arrives on time. He's always smiling and willing to hear your concerns. He provides sound advice and if he doesn't know the answer, he admits it and will try to get you the information you need to address your concerns.


Andre Minassian




This gentleman is the most professional, knowledgeable, and thorough hvac technician that I have ever had pleasure to work with. I always request that he be the technician to perform my systems' maintenance. You will find no one better.


We received a very friendly courteous service. The service technician seemed knowledgeable and was very helpful.





Very helpful




Jeremy was very helpful and informative with what was going on with my system, all over the phone.


First Rate !




Jeremy was very professional and a pleasure to deal with. Zero complainants. Thanks. Tim


Very nice technician, excellent customer service





Reliable excellent service




My technician Jeremy was courteous, friendly, professional and knowledgeable, which led to a great customer service experience. Thank you!


Great Service




Jeremy Garner was professional, pleasant, and I'm pleased to have him as my new HVAC service representative. Please tell the boss I appreciated them sending him. Thank you.


Professional and efficient tech, but fair office communication




I thought I was first call between 8 and 9 am, but when I called the office that morning I was told the tech was in traffice. When the tech arrived he told me the tech that was assigned to my job called out sick and he was called to a substitute after his first call. The office should have called that morning when they knew no one would be at my house by 9 so I could have called my employer to say I would be later than anticipated.


Jeremy G.

Jeremy G.

Heating inspection

Near Ridge Ct, Fairfax, VA 22032
Jermaine A.

Jermaine A.

No Hot Water

Near Marcum Ct, Fairfax, VA 22033
Jermaine A.

Jermaine A.

No Hot Water

Near Marcum Ct, Fairfax, VA 22033
Jermaine A.

Jermaine A.

Heating inspection

Near Dorr Ave, Fairfax, VA 22031
Jermaine A.

Jermaine A.

Heating inspection

Near Prosperity Ave, Fairfax, VA 22031
Jeremy G.

Jeremy G.

Cooling inspection plus repairs

Near Sperrin Cir, Fairfax, VA 22030
Daniel M.

Daniel M.

No AC

Near Castlecary Ln, Fairfax, VA 22030
Jeremy G.

Jeremy G.

AC inspection

Near Farr Oak Cir, Fairfax, VA 22030
Jeremy G.

Jeremy G.

Cooling inspection

Near Ruben Simpson Ct, Fairfax, VA 22033
Jermaine A.

Jermaine A.

AIRFLOW ISSUE

Near Roberts Rd, Fairfax, VA 22032
Jermaine A.

Jermaine A.

AIRFLOW ISSUE

Near Eaton Pl, Fairfax, VA 22030
William C.

William C.

Performed contracted cooling inspection on Carrier Infinity Heat Pump

Near Paynes Church Dr, Fairfax, VA 22032
William C.

William C.

Performed contracted cooling inspection on carrier infinity heat pump.

Near Paynes Church Dr, Fairfax, VA 22032
William C.

William C.

Performed contracted cooling inspection on Trane A/C system.

Near Fairfield House Dr, Fairfax, VA 22033
Daniel M.

Daniel M.

Water heater

Near State Rte 699, Fairfax, VA 22031
Jermaine A.

Jermaine A.

HUMIDIFIER CONFIGURATION

Near Colchester Rd, Fairfax, VA 22030
Jeremy G.

Jeremy G.

Duct noise

Near Roberts Rd, Fairfax, VA 22032
Jeremy G.

Jeremy G.

Cooling inspection

Near Thayer Ct, Fairfax, VA 22030
Jeremy G.

Jeremy G.

Cooling inspection

Near Prosperity Ave, Fairfax, VA 22031
Jeff H.

Jeff H.

Installed Kohler kitchen faucet

Near US-50, Fairfax, VA
Jeff H.

Jeff H.

Near Upper Park Dr, Fairfax, VA 22030
Jeff H.

Jeff H.

Installed Kohler kitchen faucet.

Near Bannockburn Ct, Fairfax, VA 22030
Jeff H.

Jeff H.

Near Park Vista Blvd, Fairfax, VA 22030
Jeremy G.

Jeremy G.

Cooling inspection

Near State Rte 699, Fairfax, VA 22031
Jeremy G.

Jeremy G.

Cooli inspection

Near Penderview Terrace, Fairfax, VA 22033
Jermaine A.

Jermaine A.

AC INSTALL

Near Timber Log Way, Fairfax, VA 22030
Jeremy G.

Jeremy G.

Cooling inspection

Near Prosperity Ave, Fairfax, VA 22031
Jeremy G.

Jeremy G.

Cooling inspection

Near Prosperity Ave, Fairfax, VA 22031
Jeremy G.

Jeremy G.

Cooling inspection

Near Merrilee Dr, Fairfax, VA 22031
Jeremy G.

Jeremy G.

Cooling inspection

Near Prosperity Ave, Fairfax, VA 22031
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