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A furnace tune-up in Triangle is $99 a system, for the gas furnaces that heat about three of every four owner homes here.
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5.0 stars across 1,132 reviews
Two of our heating technicians in a Northern Virginia basement, beside an open gas furnace.
Licensed and insuredVirginia Class A contractor #2705192276
24/7 emergency serviceOften same-day, and we will tell you honestly when we can get there.
Our own HVAC installersA dedicated heating and cooling team, separate from our plumbers
Price in writing firstYou see every option priced before anything is ordered
What it costs
$99 for one furnace, anywhere we work. The tech checks the gas pressure, the temperature rise, the safeties and the sequence of operation, which is the order the furnace lights, heats and shuts down in. A repair it turns up gets a written price first, and you decide.
Furnace tune-up, one system
$99
Heat pump, boiler or ductless mini split tune-up, one system
$99
Comfort+ membership, a heating maintenance visit every fall included
$199 a year
It’s priced per system, so a house with a second furnace for the upstairs is two tune-ups. A heat pump, a boiler or a ductless mini split is the same $99 a system.
With Comfort+ membership, $199 a year or $20 a month covers four visits every year: a heating maintenance visit in the fall, a cooling maintenance visit in the spring, a dryer vent cleaning, and a water heater flush with a sewer camera inspection. We book each one when it’s due.
What’s different in Triangle
For cold-weather records Triangle leans on the Marine Corps air station at Quantico, 3.8 miles south-southeast at the Potomac’s edge, a hundred feet below Triangle’s middle. Its 1991 to 2020 normals count 4,002 heating degree days a year, two and a half times its cooling degree days, and about 76 freezing nights. In half of years the first 32 degree night comes by November 8, the date to beat: a dirty flame sensor limps through October and quits on the first hard night.
About three Triangle owners in four burn natural gas. Electric heat, usually a heat pump, covers about one owner in five, and a heat pump tune-up is the same $99 a system. Propane is rare, about 40 owner homes across 22172, and a propane furnace gets its pressure checked against propane’s numbers, not natural gas’s.
Snow tests the venting. The January 2016 blizzard left 18.5 inches near Dumfries, a mile and a half north, and the January 2025 storm ended with 45 mph gusts and blowing snow. In the 2004 plats, Garrison Woods, Moncure Woods and The Reserve at Potomac Crest, a builder furnace breathing through plastic pipes low on a side wall shuts down when a drift covers them. The County’s fire and rescue department wants furnace vents kept clear during and after a snowstorm, and the tune-up proves the switch that stops the burners when those pipes block still works.
Graham Park heats differently. Its first plat dates to 1950, Nob Hill and Graham Park Shores followed in the 1960s, and a furnace there is usually a replacement, sometimes the third. Where it shares a chimney with a gas water heater, the tune-up watches the draft and the safeties through a whole cycle. If ice like February 2021’s quarter inch near I-95 brings lines down, a gas furnace goes cold too, since it needs power to light; a generator belongs outdoors, the County’s fire department says, more than 20 feet from any window.
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
When it’s worth doing
Extreme Cold Warnings, wind chills of 0 to minus 10 from the Piedmont to I-95, and cold that hung on into February. If your furnace ran nonstop while the house slid anyway, or shut off and relit on its own, a fall tune-up’s readings show which was at fault.
A furnace that went in with the house is close to 20 years old on a lot of these streets. That’s the age when inducer motors and control boards start to go, and a yearly look finds the tired ones before a cold night does.
That’s the night every furnace in town gets asked to work at once. A tune-up in the fall finds a weak part while you still get to choose when it’s fixed.
Safety and paperwork
Prince William County Fire and Rescue says to have a qualified technician inspect the heating system and chimneys every year, to make sure nothing blocks the fumes from venting out of the house. Source.
Prince William County Fire and Rescue lists furnaces and water heaters among the household sources of carbon monoxide, and says to put a CO alarm outside each sleeping area and on every level of the home and to test it monthly. Source.
Our Virginia Class A contractor license, 2705192276, is on the side of the van.
Choosing who tunes it up
Questions to ask anybody who quotes you, us included.
On a furnace that vents through the wall, the pipe ends outdoors matter as much as the burners. Ask whether the tech checks they’re open and clear of shrubs, mulch and leaves, and writes it down.
Ask before anyone comes out. Gas pressure and temperature rise are readings on a meter, so a real tune-up has numbers in it, not just a look at the filter.
Some tune-ups end in a list. Ask which items are failing now, which can wait a season, and what each one costs, before you agree to any of it.
Two of our crew going over a work order before the day's calls.
From our Google reviews
5.0 stars across 1,132 reviews. Read them on our reviews page.
Elvis Diaz did an excellent job cleaning our condo’s HVAC system. He was very knowledgeable about maintaining the unit and the price was very reasonable.
Where we work
Next door to Triangle: Quantico, Dumfries, Woodbridge, Stafford and Lorton.
Questions
Usually the owner. Virginia’s landlord law has the owner keep the heating that came with the home in safe working order, and close to four Triangle homes in ten are rented, the typical one across 22172 built in 1976. Ask the owner to book before the first cold night.
No. Homes aboard Marine Corps Base Quantico are maintained by Liberty Military Housing, so on-post families call their housing office. Off the base, a house, townhouse or condo with Triangle mail books at $99 a system.
$99 for one furnace, and the same for a heat pump, a boiler or a ductless mini split. If it turns up a repair, you get the price in writing before any work, and you decide.
No. The furnace tune-up is its own visit at $99. The Heating Check and the Clean Heat deep clean, the one that takes the blower wheel out and cleans it, are separate offers with their own terms on our Clean Heat page.
Ready when you are
Call, or send the form at the top. One furnace is $99, and anything it needs gets a written price before any work.
SwiftPro Heating, Cooling & Plumbing
4230 Lafayette Center Dr N, Chantilly, VA 20151
44679 Endicott Dr, Suite 211, Ashburn, VA 20147
Virginia Class A contractor license #2705192276
SwiftPro Heating, Cooling & Plumbing is a licensed, BBB Accredited (A rating), independently owned heating, cooling and plumbing company in Chantilly, serving Triangle and the rest of Northern Virginia. Virginia contractor license #2705192276. 5.0 stars across 1,132 reviews on Google, Angi, Yelp, the BBB and Facebook. SwiftPro maintains a dedicated HVAC team and a dedicated plumbing team.
From SwiftPro Heating, Cooling & Plumbing in Chantilly. Housing figures are the Census Bureau’s American Community Survey, 2020 to 2024, for each place named; permit, water and sewer facts link to each office’s own page and were checked in September and October 2026.