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About Us

HVAC Unlimited in Northern Virginia

Welcome to HVAC Unlimited! Since 2006 our team has been proud to offer home and business heating, cooling, and plumbing services in Northern Virginia. We are family owned and operated—a more important fact than might first appear, because it means we offer a personalized touch to each and every service. There’s no “cookie cutter” solution from the HVAC Unlimited team. Your needs are unique, and we tailor our services to accommodate them!

Whether you’re looking for complete design and installation or timely repairs, our experts are the ones that can offer you peerless results, prompt solutions, and at a price you can be comfortable with, too. When you need specialists in Northern Virginia, there’s only one name you need to know: HVAC Unlimited.

A Brief Look at Our History

Though we’ve been HVAC Unlimited since 2006, our roots go a whole lot deeper. Owner John Cunningham has been in the HVAC and home service industry for going on 30 years. And he learned the basis of everything he knows from his father—a man with a combined 45 years in home and business heating and cooling, and one with a master’s license in every trade in the industry.

Now holding both an HVAC Masters License and a Class A Contractor License, John built HVAC Unlimited to serve home and business owners in our area with superior results, an aim for perfection, and complete loyalty. Our history shows a deep dedication to mastering our craft, and that’s a fact that happily translates to better service for our clients.

HVAC Unlimited: Striving for Perfection

The road to perfection is one that doesn’t really ever end, and that’s honestly something we love about the HVAC and plumbing industries. There’s always a new technique or type of technology out there, each and every year, and we pledge and put forth ourselves wholly to mastering every last one. For us “Striving for Perfection” isn’t only a slogan—it’s the way we do our business.

We back up our pursuit of perfection by offering our clients the absolute best for each and every service, be it a simple repair or a complex installation project. When you work with HVAC Unlimited you get the advantage of:

  • A complete 100% satisfaction guarantee on all services performed.
  • Factory-trained and certified technicians for every job, with an average experience of 12+ years in the industry
  • No nonsense, clear pricing for all services performed. No hidden fees or wonky, incomprehensible figures.
  • Complete dedication to our clients. Your needs and comfort come first.
  • Full 24-Hour emergency service coverage. When you need HVAC Unlimited, we’ll be there!
  • Great customer testimonials. Paid ads are all good and well, but it’s the glowing reviews from our real clients that really show our dedication to friendly, reliable service.

Carrier Factory Authorized Dealers in Northern VA

We are trained and certified Carrier Factory Authorized Dealers. A fact we’re quite proud of, and also one that enables us to offer clients products that match our dedication to superior service. Carrier products are some of the best in the industry, and so we know that when we perform an installation or replacement service we’re offering you the best we can muster on all fronts.

HVAC Unlimited Serves Northern Virginia

You want someone who will take care of you promptly with expert care when heating, cooling or plumbing issues strike. We promise to respond as fast as possible when you call us with an emergency issue. Just contact us on our service repair hotline, and we will schedule your plumbing service or A/C repair and have a technician sent to your home or business right away. Serving Prince William, Fairfax, and Loudoun counties, including:

Our highly-trained and qualified technicians at HVAC Unlimited, Inc. strive for perfection when working with all clients, residential and commercial alike. From installation to service, your comfort is our goal and we’ll work until you are completely satisfied—charging customers for the job, not by the hour.

See What Our Satisfied Customers Are Saying

Local Reviews
for Northern Virginia

Rated 5.0 out of 5 stars based on 610 customer reviews

Map of Alexandria, VA

Great Service that exceeded my expectations!!




This is by far the best HVAC company I have used. Erwin was professional, knowledgeable and extremely thorough. He did such a great job that I signed up for their maintenance contract to ensure my systems are always operating at their optimum level.


Map of Alexandria, VA

Terrific and Fast Service




Erwin worked diligently on repairing several aspects of our air conditioning system. He was very professional, showing me the damage to our units and explaining how the components work together to efficiently and safely provide AC to our home. I've never had a technician be so thorough and explain what needed to be done in such a comprehensive and easy to understand way. I really appreciated all his hard work and thoroughness especially on a very hot day!


Map of Arlington, VA

Great service, knowledgable and professional technician.




The technician was responsive on a Sunday afternoon. He was very professional and did a great job. Couldn't have asked for better service and experience.


Rony T.

Rony T.

No air conditioning found clogged drain line.

Near Midtown Ave, Alexandria, VA 22303
Erwin V.

Erwin V.

Water leaking.

Near Elba Rd, Alexandria, VA 22306
Erwin V.

Erwin V.

No a/c

Near Prince St, Alexandria, VA 22314
Erwin V.

Erwin V.

No A/C

Near N Randolph St, Arlington, VA 22201
Erwin V.

Erwin V.

Repairs air conditioning system

Near Cannon Ln, Alexandria, VA 22303
Jermaine A.

Jermaine A.

No AC

Near Jamieson Ave, Alexandria, VA 22314
Jermaine A.

Jermaine A.

No ac

Near N Woodstock St, Arlington, VA 22207
Jermaine A.

Jermaine A.

No Ac

Near 20th St N, Arlington, VA 22207
Jermaine A.

Jermaine A.

No AC

Near Aristotle Dr, Fairfax, VA 22030
Jeremy G.

Jeremy G.

No ac plus repairs

Near Ingleside Ave, McLean, VA 22101
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  • For emergency service, please call our office at 703-493-1200.

24/7 SERVICE
EMERGENCY SERVICE

We have staff on call 24/7 to provide assistance to contract customers during emergency situations. For quick, efficient emergency services, please call (703) 493-1200 immediately.