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Furnace Services

Northern Virginia Furnace Services

Providing Top-Rated Furnace Installation, Replacement & Repair in Lorton, McLean, Fairfax, Alexandria, Arlington & More!

Putting up with furnace issues shouldn’t be part of your daily routine in winter. If you’ve been having problems with your furnace or know it’s time to get a furnace replacement, look no further than HVAC Unlimited. You can count on us for a full diagnostic and consultation, as well as 24 hour emergency installation.

We offer:

Northern VA Furnace Installation

The discovery of fire is one of mankind’s great achievements, one you can surely appreciate on a cold winter night. Extreme cold is normal for northern Virginia winters. If you use natural gas or propane, then an open flame using gas as fuel provides your heating. Any time there are open flames present inside a house, extreme caution needs to be used. Leaks can be catastrophic and real care must be taken by your furnace contractor for heating to make sure all potential areas for leaks are thoroughly sealed and tested. The presence of carbon monoxide is another area of concern. As you can see, an expertly installed and maintained heating system is important for your comfort as well as your safety.

Your options for furnaces include gas furnaces, electric furnaces, and oil furnaces from the trusted brand Carrier:

  • Gas furnace: Gas furnaces are more efficient than oil furnaces, but are usually slightly more of an upfront investment. The fuel typically costs less, but you need to be in an area that has fuel readily available. While gas furnaces are quieter and cleaner, they provide less heat per BTU.
  • Oil furnace: Oil furnaces typically cost less that gas furnaces, but their fuel is usually a little pricier. You get higher BTUs—which means more heat—than gas, but maintenance is more extensive. More residents in the Virginia areas use gas furnaces, but if you have an older house you might have inherited an oil unit.
  • Electric furnace: Electric furnaces use electricity to heat your home, which means no fuel costs and open flames in your home. They are typically more expensive that fueled furnaces, but are more durable, last longer, and don’t emit carbon dioxide. They are also quicker to be installed.

Northern VA Furnace Replacement

Home heating costs can be volatile, rising and falling with the price of fuel. This makes energy efficiency extremely important. We are aware of this and can help you by providing upgrades that will squeeze more heating out of each drop of fuel. Replacing older heating equipment with modern, energy-efficient models can make a remarkable difference in utility costs and provide you with years of savings.

Some signs you need a furnace replacement include:

  • A furnace that’s more than 15 years old
  • Rising gas or electric bills
  • Increasing amounts of furnace repairs
  • Yellow burner flame
  • Clanks and other strange noises
  • Reduction in air quality
  • Musty or gaseous smells in your home
  • Uneven heating in your home

If you’ve noticed any of these signs, it might be time for a furnace replacement in Lorton or the surrounding Northern Virginia areas!

You may be interested in: Signs it’s Time for a Furnace Upgrade

Top-Rated Furnace Service Company Headquartered in Lorton, Virginia

Lorton is part of Fairfax County in Northern Virginia, and is home to 18,610 residents. That means there are more than 18,000 people who rely on a reputable heating company to provide the heating services they need—and HVAC Unlimited is happy to help. Whatever reason brought you to Lorton—even if it was to be closer to the Five Guy’s headquarters—we’re glad it did! (We’d be lying if we said we don’t love having our Lorton heating company close to the best burgers in the area!) We look forward to providing you and your family the best heating services in Lorton—give us a call today!

See What Our Customers Are Saying

“Rob was awesome. He was quick, thorough and extremely knowledgeable. He offered me the service contract which was a great deal for me. He came out on a Sunday when other companies weren’t available. He was at my house quickly and exactly when he said he would be and efficient and thorough once he started working.”

– Neal (Lorton, Virginia)

“I have used HVAC Unlimited since I bought my home 10 years ago. From installation and service appointments they are always so wonderful and my unit rarely ever needs attention. My most recent appointment with Jeremy this Saturday could not have been better. I will only use HVAC Unlimited!”

– Kate (Arlington, Virginia)

“I have used most of the “highly rated” HVAC companies in Northern VA and this company rocks! Allows you to schedule and they honor your time, excellent technicians, fair pricing without upselling you on contracts.”

– Jeanie (Alexandria, Virginia)

Furnace Installation and Furnace Services in Northern Virginia

There are other elements to consider besides the equipment, and we will be happy to talk to you about other aspects of your home or business that impact the cost of heating. There is no need to be left out in the cold. Schedule your heating repair, service or installation appointment today and we will provide you with all the information you need.

What is your heating footprint?

We Provide Furnace Services to the following areas in Northern Virginia:

Aldie, Alexandria, Annandale, Arlington, Ashburn, Bailey’s Crossroads, 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, 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 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.


Map of McLean, VA

Great company, Great Service!




Came out the same day to fix broken A/C. Technician called ahead and came to the house at the promised time. Great price and the technician was awesome! Explained exactly what he was doing, showed me the broken part and fixed it in no time.


Map of Lorton, VA

HVAC Service Call




I highly recommend this company for your HVAC needs! What a tremendous effort by the HVAC Unlimited Team supporting our requirements. I called several other companies who either did not return my call or had excessive emergency rates. The HVAC Unlimited Team was timely, professional, and provided exceptional customer service. The HVAC representative (Jeremy G.) was a total pro -- he kept me informed on his arrival time, provided detailed analysis of the diagnosis, and walked me through the process of bringing my HVAC back to a fully mission capable state. Further, Jeremy was very patient and answered the plethora of questions I had regarding my system and provided information on routine service opportunities that the company can provide. If you are in need of HVAC support, don't hesitate any further, call this team and you will be in good hands.


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!


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
Erwin V.

Erwin V.

Air conditioning repairs

Near N Van Dorn St, Alexandria, VA 22304
Jermaine A.

Jermaine A.

AC Repair

Near N Hampton Dr, Alexandria, VA 22302
Jeremy G.

Jeremy G.

Clearing clogged drain

Near Middle Ruddings Dr, Lorton, VA 22079
Josue R.

Josue R.

Responded to a no A/C call, when arrived found thermostat miswired not energizing the reversing valve, corrected wiring and performed start up and run checks to assure proper sequence of operations.

Near Dead Run Dr, McLean, VA 22101
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
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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.