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Commercial HVAC Services Fairfax, VA

Your employees need a cool, comfortable workplace to stay productive throughout the year, and you need great HVAC systems to keep your office that way. At HVAC Unlimited, we’re known for striving for excellence in everything we do, and that includes our comprehensive commercial heating and cooling services. From HVAC replacement and installation to maintenance and repair, we have all the great services your business needs to maximize productivity and minimize costs.

Commercial HVAC Replacement and Installation

When you need a new commercial heating and cooling system for your business, choose us. Our technicians will help you select the best system for your space. Plus, they are certified and trained to install every unit to the manufacturer’s expectations, which ensures optimal efficiency and lower operating costs for you. We’re proud to offer a broad selection of Carrier heating, cooling and air quality systems to our commercial customers, including:

  • Air conditioners
  • Heat pumps
  • Boilers and furnaces
  • Geothermal heat pumps
  • Air purifiers, ventilators and other indoor air quality systems
  • Packaged products
  • Thermostats and control systems
  • Cooling towers
  • Chillers
  • Water source heat pumps
  • VAV Boxes
  • IT rooms
  • Liebert systems

Because every office’s heating and cooling needs are unique, we start every installation project to assess those needs. Our expert technicians will work with you to find the right climate control solution for your business, then work diligently to install it up to the manufacturer’s specifications.

Commercial HVAC Maintenance and Repair

Any successful business depends on efficient operations, and we’re here to help you run your company more efficiently with improved heating and cooling. We offer affordable annual service agreements to check on your essential commercial heating and cooling systems and clear up any emerging issues. Moreover, we’ll make the small calibration adjustments needed to minimize energy usage without sacrificing cooling power. In short, annual service from HVAC Unlimited will save you money now on your utility bills and even more later on repairs and replacement.

Of course, even well-maintained systems occasionally have issues, and we know your business can’t afford to wait. That’s why we offer 24-hour emergency repair services; whenever there’s a problem, our expert technicians will be there quickly. We’re fully qualified to repair all major makes and models of HVAC systems, and we complete most repair jobs in a single visit.

Our Credentials

At HVAC Unlimited, we know our colleagues in the business community can only afford to do business with companies they trust. We are a class A licensed, bonded and insured corporation, and we hold a Mechanical Master License in the Commonwealth of Virginia. Our founder and Vice President, John and Jack Cunningham, have a combined 60 years’ experience at every level in the HVAC industry. We bring our vast expertise and commitment to excellent service to every installation, service and repair job, and we’re proud to provide the top-quality service that our commercial customers have come to trust.

HVAC Unlimited Service Areas

We serve areas throughout Northern Virginia, including Aldie, Alexandria, Annandale, Arlington, Ashburn, Bailey’s, Brambleton, Bristow, Burke, Centreville, Chantilly, Clifton, Fairfax, Fairfax Station, Falls Church, Fort Belvoir, Franconia, Gainesville, Great Falls, Haymarket, Herndon, Leesburg, Lorton, Manassas, Mclean, Mount Vernon, Oak Hill, Oakton, Purcellville, Reston, South Riding, Springfield, Stafford, Sterling, Tysons Corner, Vienna, West Springfield, and Woodbridge.

Contact us online now or give us a call us at 703-493-1200 to schedule a service! 

Local Reviews
for Northern Virginia

Rated 5.0 out of 5 stars based on 605 customer reviews

Map of Arlington, VA

Great Service





Map of Lorton, VA

Good service





Map of Arlington, VA

Quick and Professional Service




Jermaine was great both on the phone and in person. He listened patiently to my story, discussed options with me, and then helped arrange next-steps. Couldn't be happier with his service.


Map of Lorton, VA

Good service




Technician Jermaine Allen was patient in answering questions & explains the tests that he is performing.


Map of Arlington, VA

Excellent service




Jermaine Allen replied to a late call on a Saturday afternoon. He came promptly, did a fine job, and was personable and friendly. He fixed my problem and got my AC running on a hot Memorial Day weekend. I appreciate it!


Map of Arlington, VA

Great job as usual




Very happy with Jermaine. Friendly and competent, does a great job.


Map of Alexandria, VA

Outstanding Customer Service!!




Very professional and thorough


Map of Arlington, VA

Great service




I called HVAC Unlimited to schedule a maintenance service agreement for my system. Was able to get an appointment in two weeks and was very happy with the service. Jermaine was great, professional, police and knowledgable. Very happy with the service.


Map of Lorton, VA

Excellent service!




Jermaine was a wonderful technician. He was very thorough and attentive. I could not be happier with the treatment I receive from HVAC Unlimited.


Map of Lorton, VA

Great Service




I highly recommend HVAC Unlimited for your patronage. The service team is thorough, attentive and on time. I put complete faith in the work that they do.


Robert C.

Robert C.

Performed cooling inspection and cleaned blower assembly on Bryant system

Near Randolph St, Fairfax, VA 22030
Jermaine A.

Jermaine A.

No AC

Near Heatherway Ct, Alexandria, VA 22315
Jermaine A.

Jermaine A.

No AC

Near Heatherway Ct, Alexandria, VA 22315
Robert C.

Robert C.

Replaced failed capacitor on Carrier heat pump system

Near Flintridge Ct, Fairfax, VA 22032
Erwin V.

Erwin V.

Fixing water leaking and other repairs

Near Byrd Dr, Fairfax, VA 22030
Jermaine A.

Jermaine A.

Cooling Inspection

Near E Walnut St, Alexandria, VA 22301
Jermaine A.

Jermaine A.

Cooling Inspection

Near Springfield Dr, Lorton, VA 22079
Jermaine A.

Jermaine A.

Cooling Inspection

Near Sperrin Cir, Fairfax, VA 22030
Erwin V.

Erwin V.

Repairs air conditioning.no a/c call

Near Furey Rd, Lorton, VA 22079
Jermaine A.

Jermaine A.

Cooling Inspection

Near Custis Memorial Pkwy, Arlington, VA 22201
Jermaine A.

Jermaine A.

Cooling Inspection

Near Custis Memorial Pkwy, Arlington, VA 22201
Erwin V.

Erwin V.

Water leaking and cleaned coil

Near Chesterbrook Vale Ct, McLean, VA 22101
Jermaine A.

Jermaine A.

Cooling Inspection

Near 15th St N, Arlington, VA 22201
Jermaine A.

Jermaine A.

Air Ducts Condensing

Near Clarendon Blvd, Arlington, VA 22201
Jermaine A.

Jermaine A.

No AC

Near Byers Dr, Alexandria, VA 22309
Jermaine A.

Jermaine A.

Cooling Inspection

Near Towne Manor Ct, Alexandria, VA 22309
Robert C.

Robert C.

Found breaker tripping from dirty condenser coil. Cleaned coil and checked system

Near Meadowcreek Ln, Lorton, VA 22079
Jermaine A.

Jermaine A.

NO AC

Near N Greenbrier St, Arlington, VA 22205
William C.

William C.

Install new Carrier 5 Ton A/C and Coil, also tested system operation to ensure proper cooling.

Near W View Terrace, Alexandria, VA 22301
Jermaine A.

Jermaine A.

Cooling Inspection

Near Fascination Ct, Lorton, VA 22079
Jermaine A.

Jermaine A.

Cooling Inspection

Near 23rd Rd N, Arlington, VA 22201
Jermaine A.

Jermaine A.

Cooling Inspection

Near Wyndham Cir, Alexandria, VA 22302
Jermaine A.

Jermaine A.

Cooling Inspection

Near 20th Rd N, Arlington, VA 22205
Robert C.

Robert C.

Found blown fuses from dirty outdoor coil. Cleaned coil and replaced fuses for carrier system

Near S Woodstock St, Arlington, VA 22204
Jermaine A.

Jermaine A.

Cooling Inspection

Near Mayhurst Blvd, McLean, VA 22102
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