Open 24/7 for emergencies
A furnace tune-up in Lorton is $99 a system, for a natural gas furnace in Laurel Hill or a propane one on Mason Neck.
Get your price in writing
Send this and the office calls or texts you back to set a time.
We’ll call or text this number about your request. By sending it you agree to our terms and privacy policy.
Rather talk now? (703) 997-9757
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 Lorton
Across Lorton’s ZIP about six owners in ten heat with natural gas, one in three with electricity and three in a hundred with propane, and the two ends are far apart. Close to 85 percent of Laurel Hill burns gas. On Mason Neck it’s about one owner in ten on gas, one in ten on propane, and close to two in three on electricity, usually a heat pump. So the first thing to know about a Lorton furnace is what feeds it.
Laurel Hill’s median house went up in 2002, and plenty there still run the builder’s furnace. At twenty-some years one can light every time and still be drifting, which is what a tune-up’s numbers are for: the gas pressure at the valve, the temperature rise across the heat exchanger, each step of the start-up in its order. Written down this fall, they give next year’s readings something to be measured against.
A propane furnace burns like a natural gas one, but at a higher pressure at the burner, with its own orifices and valve setting, and one converted from natural gas, or set up for the wrong fuel, shows it on the gauge. The tune-up measures that pressure against propane’s numbers and looks hard at the flame. Check the tank’s gauge before the cold comes, too: a furnace that runs the tank dry stays off until it’s filled.
In the Lorton Census place a quarter of the homes are in condo and apartment buildings and about two owners in three heat with gas, often with a compact furnace in a utility closet. One that draws its combustion air from inside the house needs that air to reach it, which is why so many of those doors are louvered. A solid door hung during a remodel, or louvers blocked by a laundry rack, starves the burner. You can check that yourself tonight.
Neighborhood by neighborhood
Census figures for the owner-occupied homes in each place, and what that usually means for a tune-up.
| Place | Median home built | Most homes are | Heated with | What the tune-up usually meets |
|---|---|---|---|---|
| Lorton | 2001 | single-family houses, about 4 in 10 | gas, about 7 in 10 | The builder’s gas furnaces, many close to 20 years old. |
| Newington | 1981 | townhouses, about 6 in 10 | electricity, about 6 in 10 | Mostly heat pumps; furnaces are the smaller share. |
| Laurel Hill | 2002 | single-family houses, about 4 in 10 | gas, about 8 in 10 | The builder’s gas furnaces, many close to 20 years old. |
| Mason Neck | 1973 | single-family houses, nearly all | electricity, about 6 in 10 | Mostly heat pumps; furnaces are the smaller share. |
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
ZIP 22079 as a whole: every Lorton address. Most of Newington, in the table, has Springfield mail.
When it’s worth doing
Natural gas and propane burners should both burn mostly blue and steady. Yellow, floppy flames, or soot around the burner openings, say the gas pressure or the air supply is off. Book the tune-up now rather than run the furnace that way all winter.
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.
Up there it’s the one nobody looks at until the bedrooms go cold. A tune-up gets somebody up the ladder before that.
Safety and paperwork
Fairfax County Fire and Rescue says to have the heating system cleaned and checked by a professional every year, and to keep anything that burns at least three feet from the furnace and the water heater. Source.
Fairfax County Fire and Rescue names a faulty gas furnace or water heater as a carbon monoxide source, says to have gas appliances inspected every fall, and to put a CO alarm on every floor. 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.
The exhaust leaves up a metal flue to the roof or out plastic pipe through the side wall. On a twenty-year-old house, shrubs have often grown up around those side-wall pipes, and leaves or a snow drift can block them. A tune-up that never leaves the utility room has checked half the trip.
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.
Quick response, Elvis was knocking my door in a couple of hours after my call to the office. He did full inspection for both HVAC units, and answered all my questions. Both systems are working well. I always have very pleasant experience with SwiftPro
Where we work
Next door to Lorton: Fort Belvoir, Springfield, Woodbridge, Fairfax Station and Burke.
Questions
Yes, each furnace is its own system at $99. A two-story house from the 2000s often has a second system for the bedroom floor up in the attic, and since nobody goes up there, it’s the one most likely to be running on an old filter. If the attic unit turns out to be a heat pump’s air handler rather than a furnace, it’s still one system at $99.
$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 Lorton 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.