Open 24/7 for emergencies
In Philomont, where propane outpaces gas, a boiler gets a $99 tune-up and a new one costs $9,900 to $16,500 installed.
Price range
$9,900-$16,500
8yrs @ 7.99%
$140/mo
15yrs @ 9.99%
$106/mo
Monthly figures on the starting price, the whole price financed, on approved credit. The lender sets the final terms. How financing works
Get your price in writing
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Rather talk now? (703) 997-9757
5.0 stars across 1,132 reviews
Two of our heating technicians in a Northern Virginia basement. The same team tunes up, repairs and replaces boilers.
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
A new boiler runs $9,900 to $16,500 installed, the range of our own boiler replacements; a condensing or combi boiler lands at $12,782 to $16,500. A tune-up is $99 a system.
High-efficiency condensing boiler or combi boiler, installed
$12,782 to $16,500
or $213/mo at 0% APR for 60 months
Cast iron boiler on the chimney, replaced like for like, installed
$9,900 to $13,690
or $165/mo at 0% APR for 60 months
Boiler tune-up, one system
$99
Boiler repair diagnostic visit
$99
Monthly figures: 60mo @ 0% APR on each starting price, the whole price financed, on approved credit. Longer plans lower the payment and cost more in total. The lender sets the final terms. How financing works
A repair starts with the $99 diagnostic. If the fix is a circulator pump, a valve or an expansion tank, you get that price in writing before we start, and you decide.
Want a closer number before anyone comes out? The boiler estimator asks a few questions about yours and shows the range for that job.
What’s different in Philomont
Philomont’s own ZIP, 20131, is post office boxes only, so its Census figures come from 20132, the Purcellville ZIP area around it. There, propane and electricity each heat about 42 percent of owner homes, and natural gas and oil about 6 percent each. A hot water boiler in Philomont is far more likely to burn propane than gas, and the propane ones are ours to repair; oil is the one fuel we don’t work on.
The village sits in the center of the Loudoun Valley, about midway between Middleburg and Purcellville, among rolling hills and streams. The housing around it runs young: the typical owner home in 20132 went up in 2000, close to half since then, while about one in four is older than 1980. Cast iron boilers on chimneys belong mostly to that older quarter.
Winter in the valley runs colder than in the east of the county. Purcellville’s station, the closest, records 4,942 heating degree days a year and freezes on more than a hundred nights. After the December 2022 arctic front, Philomont’s wind chill reached -9, and on January 22, 2025 it hit -8, with a low of -2 the next morning. Those are the nights a boiler’s circulator, igniter and safeties all have to work at once.
Flooding is the other local hazard: the Snickersville Turnpike near Hibbs Bridge Road, about a mile from the village, closed for high water twice in 2018. A boiler in a basement that takes on water needs its burner and controls checked before it runs again, even when it looks dry.
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.
What it’s telling you
A condensing boiler’s exhaust is wet, and on a night like January 2025’s it can freeze around the side-wall vent or the intake and trip the boiler off. Keep the vent clear of drifts, and if it locks out more than once in a cold spell, the $99 visit checks the vent run and the condensate line, which can freeze too.
A new Weil-McLain gas boiler installed by SwiftPro in a Northern Virginia basement, with copper near-boiler piping and a bank of Taco zone valves feeding the heating loops.
Safety and paperwork
Loudoun County requires a permit to swap a gas water heater or furnace. Since October 2025, a replacement that keeps the same BTUs in the same spot needs no plans. 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.
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.
Our Virginia Class A contractor license, 2705192276, is on the side of the van.
Choosing who works on it
Questions to ask anybody who quotes you, us included.
A condensing boiler makes water as it runs, and the drain line that carries it away has to stay inside or be protected, since a frozen condensate line shuts the boiler down. Ask where the line will run before you sign.
A hot water boiler is half heating system (the burner, gas valve, flue and controls) and half plumbing (the water loop, circulator pumps, expansion tank, relief valve and zone valves). We hold a Virginia Class A license and run separate heating and plumbing teams, so each half gets a tech who does that trade every day.
A new boiler can stay on the chimney or vent out the wall in plastic pipe. A good quote says which, and whether the chimney needs a liner, because that’s where two quotes for the same boiler usually split.
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.
…did a great job recommending a new system for a Condo that did not previously have one at all (Old Boiler System). The installation went great.
Where we work
Next door to Philomont: Middleburg, Round Hill, Bluemont, Purcellville and Hamilton.
Questions
We do: the $99 tune-up, repairs after a $99 diagnostic, and replacements at $9,900 to $16,500 installed, on propane or gas.
Heat pumps already warm a large share of 20132, so it’s a fair question. Ductwork already in the house makes a heat pump possible, and we’ll price one beside a new boiler. A house heated through radiators or baseboard alone keeps the simpler path with a new boiler.
No. We work on hot water boilers, the kind that heat radiators or baseboard, on natural gas or propane. If yours is steam or burns oil, we’ll tell you on the phone, and a switch to a heat pump or a gas or propane boiler is ours to price.
Ready when you are
Call any time: we run 24/7 emergency service. Or send the form at the top. A tune-up is $99, a repair starts with the $99 diagnostic, and a new boiler 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.