Open 24/7 for emergencies
In Delaplane, propane boilers get a $99 tune-up from us, and replacements cost $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 Delaplane
ZIP 20144 counts 424 owner homes, and not one heats with utility gas. Propane heats about half, electricity about three in ten, and oil fewer than one in ten, so a Delaplane boiler runs on propane from the yard. One that won’t fire may simply be a tank that ran low, so the gauge is the first thing to look at, and the propane company’s number belongs next to ours.
The village sits about 449 feet up beside Goose Creek, inside the Crooked Run Valley Rural Historic District, and its ZIP takes in Sky Meadows State Park. The housing is mostly from the 1980s and 1990s: about half the owner homes went up in those two decades, the typical one in 1986, and about one in five is older than 1980. Nearly every owner home is a detached house, so the boiler usually has a basement or a utility room of its own.
Any fuel-fired appliance is permit work in Fauquier County, so swapping a propane boiler takes one, same spot or not. The Department of Community Development at 16 Courthouse Square in Warrenton issues trade permits over the counter, with no plans and usually no zoning approval. If the boiler quits on a cold night, Virginia’s code lets the replacement go first, provided the application reaches the County’s Building office by the end of the next working day.
Fauquier sizes heating to a winter design temperature of 17 degrees, and the valley gets colder than that feels: in the late January 2026 Arctic outbreak, the Delaplane mesonet logged a 0 degree wind chill. Storms are the other risk. On June 22, 2022, gusts estimated at 80 to 90 mph put large trees onto power lines around Delaplane, Marshall and Ashville.
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
ZIP 20144 as a whole: every Delaplane address.
What it’s telling you
A propane boiler still needs electricity for its circulator, controls and igniter, so when a storm takes the lines down, the radiators cool with it. When the power comes back and the boiler doesn’t restart, a tripped safety or a stuck circulator is the usual cause, and the $99 diagnostic finds which.
An aging Peerless cast iron boiler in a Northern Virginia basement, chimney vented, on a SwiftPro service call.
Safety and paperwork
Outside the town limits, Fauquier County issues the permit. It wants one for any fuel-fired water heater, propane included, and for any heater being moved; an electric one swapped for a similar unit in the same spot counts as an ordinary repair. Trade permits go out over the counter the day the application comes in. Source.
Fauquier County counts swapping an electric appliance for a similar one in the same spot as an ordinary repair that needs no permit. Moving an appliance to a new spot takes one. Source.
Fauquier County Fire Rescue takes requests for help getting smoke and carbon monoxide alarms through a form on its Public Education page. 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 tech who reads the gas pressure at the boiler with the burner running, rather than glancing at the tank gauge, is checking what the burner actually gets. A propane boiler set up for the wrong pressure burns badly however new it is.
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.
Replacement for my broken gas water boiler was professionally done and in a timely manner. The technicians knew exactly what they were doing.
Where we work
Next door to Delaplane: Rectortown, Upperville, Marshall, The Plains and Orlean.
Questions
Yes. The $99 tune-up on a propane boiler measures its gas pressure against propane’s settings; repairs are priced in writing after the $99 visit, and replacements run $9,900 to $16,500 installed.
Not for its age alone. A 1980s boiler with a sound heat exchanger can run on with a new circulator, zone valve or expansion tank. When the exchanger leaks, or the repair approaches the cost of a new one, a written price for both lets you choose.
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 Delaplane 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.