Open 24/7 for emergencies
Catlett’s boilers burn propane, since 20119 counts no owner home on utility gas: tune-up $99, replacement $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 Catlett
The Census counts 1,040 owner homes in ZIP 20119, all of them detached, and no owner home on utility gas: just over half run on electricity and close to three in ten on propane. So a hot water boiler here burns propane, and the tech checks its gas pressure against the propane setting on the boiler’s data plate, not natural gas numbers.
The typical house went up in 1990, but more than four in ten are older than 1980, and those are the houses with radiators or baseboard. Close to one in five homes here is rented, and in a rental the boiler is the landlord’s to keep up, so the landlord books the visit.
Fauquier County wants a permit to replace any fuel-fired appliance, a propane boiler included, even in the same spot, and that permit comes from the County’s Department of Community Development in Warrenton. A condensing or combi boiler, at $12,782 to $16,500 installed, gives up the chimney and exhausts through the wall in plastic pipe. Much of Catlett is on FCWSA water from two drilled wells, 264 and 270 feet deep, pumped to a tower on Old Dumfries Road whose height sets the pressure; that’s the supply the boiler’s fill valve draws from.
The County’s building code designs heating for a 17 degree day, and NOAA’s Warrenton 3 SE station counts about 98 nights a year at 32 degrees or below. Late January 2026 brought wind chills of 0 to 10 below across the Piedmont. A boiler that coasts through a mild night shows its age on those, which is why the tune-up belongs in the fall, while there’s still time to order a part. Warrenton 3 SE hit 3 degrees in January 2014 and 2 degrees in February 2015. Catlett also sits on Cedar Run, whose gauge in the village crested at 18.2 feet in July 2013 and 16.43 feet in April 2014, past the 15-foot minor flood stage where water reaches the low spot on Flatwood Lane.
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
ZIP 20119 as a whole: every Catlett address, the village included. The Census place for the village alone has too few homes for steady figures.
What it’s telling you
A healthy boiler brings the radiators up steadily on a cold morning. If yours takes all morning, it’s usually the circulator, air in the loop or a burner set wrong for propane, 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 boiler built for natural gas has to be converted and set for propane. Ask whether the tech will confirm the conversion and read the gas pressure at the boiler with the flame lit.
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 Catlett: Calverton, Casanova, Midland, Nokesville and Bristow.
Questions
Yes. With no owner home in ZIP 20119 on utility gas, the boilers here run on propane, and we tune up, repair and replace them: $99 a system for the tune-up, $99 for the repair diagnostic.
Because the County’s rule is written around the fuel, not the spot: anything fuel-fired, propane boilers among them, needs a permit from Community Development in Warrenton, even swapped one for one.
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 Catlett 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.