Open 24/7 for emergencies
Furnace tune-ups in Philomont, where propane heats about two in five owner homes; heat pumps and boilers are $99 a system too.
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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 Philomont
The Census figures Philomont borrows come from ZIP 20132, the Purcellville ZIP area around it, because Philomont’s own ZIP, 20131, is post office boxes only. There propane and electricity each heat about 42 percent of owner homes, while natural gas and oil heat about 6 percent each. So propane furnaces and heat pumps are the two machines the numbers point to. Price for one system: $99. In electric houses, a heat pump, a boiler or a ductless mini split with its outdoor unit counts as one system at that price.
Three feet is the clearance Loudoun County Fire and Rescue gives for anything that can burn near heating equipment. Its other yearly advice is a cleaning and inspection of the heating equipment and the chimney by a qualified professional. In its fall clock-change reminder, the county’s fire and rescue system adds a carbon monoxide alarm outside each sleeping area and on each level, tested monthly. The tune-up is that professional look at the furnace itself.
Winter here is long. The Purcellville station counts 4,942 heating degree days, a January low averaging 24.5F and 114.7 days a year with lows at or below 32F. Philomont logged a wind chill of -9F on December 24, 2022, and the coldest nights of the January 2026 arctic outbreak fell under Extreme Cold Warnings. A furnace that has been checked before those nights has had its safeties tested in the order it lights, heats and shuts down.
Timing follows the thermometer. The median first fall low of 32F at the Purcellville station lands on October 25, and the median last one on April 16, so the heating season covers most of six months. About 6 percent of owner homes in the ZIP area heat with oil. An oil burner is the one fuel we don’t service, and we would rather say so than waste a booking.
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
Philomont’s own ZIP, 20131, is post office boxes only, so the Census Bureau maps no area for it. These are ZIP 20132 as a whole, the Purcellville ZIP area Philomont sits in, the Town of Purcellville included.
When it’s worth doing
On a propane furnace that can be a dirty flame sensor, a tired igniter, a clogged filter or a tank running low. The tune-up reads gas pressure and temperature rise to tell them apart. Your part is to glance at the tank gauge before you call, since an empty tank mimics a broken furnace.
Propane runs at a different gas pressure than natural gas, so the tune-up checks yours against propane’s numbers.
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.
Safety and paperwork
Loudoun County Fire and Rescue says to have heating equipment and chimneys cleaned and inspected every year by a qualified professional, and to keep anything that can burn at least three feet from all heating equipment. Source.
In its fall clock-change reminder, Loudoun County’s fire and rescue system tells residents to check their carbon monoxide alarms, and recommends one outside each sleeping area and on each level of the home, tested 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.
Propane furnace, heat pump, boiler or ductless mini split are all tune-up work for us, and an oil burner is not. A tech who asks first brings the right gauges and a straight answer, not a surprise at the door.
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 Philomont: Middleburg, Round Hill, Bluemont, Purcellville and Hamilton.
Questions
Loudoun County Fire and Rescue does, in its guidance on heating your home safely: heating equipment and chimneys cleaned and inspected each year by a qualified professional. For the furnace itself, our visit is $99.
We don’t work on oil burners, so you hear it from us now. A propane furnace is ours, and so are heat pumps, boilers and ductless mini splits, each at $99 a system. If oil is changing to something else, a switch to propane or a heat pump is a job we can price.
$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 Philomont 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.