Emergency Service Available

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 622 customer reviews

Map of Fairfax, VA

Outstanding Professional Service




Robert Campbell, from HVAC unlimited, has been servicing my house hvac systems and our family systems for many years. Robert's hvac services are always very professional and thorough. When any repairs are needed, we feel comfortable about his honest suggestions and prices. We have recommended HVAC UNLIMITED to our family and friends and Robert Campbell is an asset to his company!


Map of McLean, VA

Informative Technician





Map of McLean, VA

Great service




On time, polite and thorough inspection


Map of Falls Church, VA

Great service




Jermaine came to service our HVAC systems today and was professional and knowledgeable. He took the time to explain things to me, which I appreciated. On top of that, he was a friendly and cheerful person. Good job!


Map of Lorton, VA

Great service delivered ahead of schedule




Fast service. Convenient and flexible.


Map of Alexandria, VA

Great service





Map of Fairfax, VA

Great Service when all the other technicians I called seemed lost!




Jermaine was super knowledgeable of my building and was able to identify and repair the problem with my air conditioner in a very quick timeframe!


Map of Arlington, VA

Wonderful experience.




Robert was very thorough and patient. He was respectful and represented HVAC Unlimited very professionally. I enjoyed his supportive, helpful nature.


Map of Lorton, VA

Great Service




On time. Knowledgeable. Professional.


Map of Arlington, VA

Extremely Knowledgeable, Very Service




Jermaine was very quick to get us a solution to what was wrong with our system and immediately fix the problem on site. He was very knowledgable and had great customer service!


Erwin V.

Erwin V.

Heating inspection and repairs

Near Leesburg Pike, Falls Church, VA 22041
William C.

William C.

Performed 2 contracted heating inspections on hydronic heat pumps.

Near Prosperity Ave, Fairfax, VA 22031
William C.

William C.

Heating inspection on Hydronic Airhandler.

Near Spring Gate Dr, McLean, VA 22102
Erwin V.

Erwin V.

Heating inspection.

Near McLean, VA 22102
Robert C.

Robert C.

Performed heating inspection on Carrier gas furnace system under contract

Near Covington St, Fairfax, VA 22031
Erwin V.

Erwin V.

Service repairs,no heating.

Near Aspenpark Rd, Lorton, VA 22079
Jermaine A.

Jermaine A.

Heat Inspection

Near Mayhurst Blvd, McLean, VA 22102
Jeremy G.

Jeremy G.

Heating inspection

Near Catbird Cir, Lorton, VA 22079
Jeremy G.

Jeremy G.

Heating inspection

Near Catbird Cir, Lorton, VA 22079
Jermaine A.

Jermaine A.

Heating Inspection

Near Falstaff Rd, McLean, VA 22102
Jermaine A.

Jermaine A.

Heating Inspection

Near Grove Ave, Falls Church, VA 22046
Jeremy G.

Jeremy G.

No ac plus repairs

Near Catskill Rd, Lorton, VA 22079
Jermaine A.

Jermaine A.

Heating Inspection

Near Towne Manor Ct, Alexandria, VA 22309
Jermaine A.

Jermaine A.

Chemically Clean Heat Pump Coil

Near N French St, Alexandria, VA 22304
Jermaine A.

Jermaine A.

No AC

Near Merrilee Dr, Fairfax, VA 22031
Jermaine A.

Jermaine A.

Erik M

Near Merrilee Dr, Fairfax, VA 22031
Jermaine A.

Jermaine A.

Heating Inspection

Near Island Creek Ct, Alexandria, VA 22315
Robert C.

Robert C.

Performed heating inspection on boiler system

Near 24th Rd N, Arlington, VA 22205
Andre M.

Andre M.

Performed cooling inspection on trane ac system

Near Anita Dr, Lorton, VA 22079
Josue R.

Josue R.

Responded to a no A/C call, when arrived found auxiliary drain pan full of water and float switch open. Vacuumed out drain pan and performed run checks, found system low on refrigerant Charged unit to manufacturer’s specs. Added 2lbs of R22. Equipment working properly at this time

Near Merrilee Dr, Fairfax, VA 22031
Jermaine A.

Jermaine A.

No ac

Near N Hampton Dr, Alexandria, VA 22302
Jermaine A.

Jermaine A.

No AC

Near 3rd St S, Arlington, VA 22204
Jermaine A.

Jermaine A.

Sweaty Air Ducts

Near Governors Pond Cir, Alexandria, VA 22310
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
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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 our customers. We provide emergency service up to 8pm for all customers and 24/7 for contract customers. For quick, efficient emergency services, please call (703) 493-1200 immediately.