Open 24/7 for emergencies
Clifton’s boilers, from the old town’s houses out to 20124’s, cost $99 to tune and $9,900 to $16,500 to replace.
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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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 Clifton
Inside the Town of Clifton the typical owner home dates from 1945, and about three in four predate 1980. Heat there is a mix: electricity leads, with about one in five owner homes on propane, about one in five on oil, and about one in ten on gas. A hot water boiler in one of those houses is likely on propane, and the gas and propane ones are the ones we work on.
Outside the town line, ZIP 20124 is a different place: 4,459 owner homes, close to eight in ten built in the 1980s and 1990s, the typical one in 1988, with gas heating about six in ten. Gas furnaces in the subdivisions off Springstone Drive and Union Mill Road are the usual heat there, and a boiler is the odd one out.
Inside the town line, a gas or propane appliance swap takes two approvals. The Town signs off first, by letter, and Fairfax County won’t move the appliance permit until that letter is uploaded to the record, with a chimney vent certification alongside it. The whole town is the Clifton Historic District, so a new wall vent for a condensing boiler at $12,782 to $16,500 installed is an exterior change that needs a certificate of appropriateness from the Architectural Review Board.
NOVEC brings power into town mostly on poles and overhead lines, and a boiler needs electricity for its circulator, igniter and controls whatever fuel it burns, so a storm that drops a line stops the heat too. Fire and rescue for the town comes from Fairfax County’s Station 16 on Chapel Road, and the County’s CO program covers town residents: an alarm on every floor and gas appliances inspected each fall.
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
Clifton mail outside the town: five- to ten-acre lots in the Occoquan watershed on Clifton, Compton and Yates Ford Roads, mostly on septic, and the 1980s subdivisions off Springstone Drive and Union Mill Road on county sewer.
ZIP 20124 as a whole, the Town included: its own homes are too few for steady Census figures.
What it’s telling you
Inside the town line a replacement’s paperwork starts with the Town’s letter, so a boiler that’s failing slowly is worth replacing on a date you pick rather than in a January emergency, when the letter and the permit still have to catch up.
An aging Peerless cast iron boiler in a Northern Virginia basement, chimney vented, on a SwiftPro service call.
Safety and paperwork
Inside the town line a gas or propane water heater or furnace swap still takes a Fairfax County permit, even like for like, with a chimney vent certification. Fairfax County won’t move the application until the Town of Clifton’s own approval is uploaded to it. Source.
The county’s carbon monoxide program covers town residents: an alarm on every floor, gas appliances inspected each fall, and a limited supply of alarms for residents who need one, put up by the local station, which for the town is Station 16. Source.
Fire and rescue in the town comes from Fairfax County’s Station 16 on Chapel Road, and the county’s heating advice applies on every fuel: a professional cleaning and check once a year, and three feet of clear space around the furnace and the water heater. Source.
Fairfax County lists replacing a heating or cooling system as mechanical permit work. 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.
Ask how they run a job inside the town line. An application filed with Fairfax County without the Town’s letter sits until someone uploads it, and the boiler waits with it.
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 Clifton: Fairfax Station, Burke, Manassas, Centreville and Fairfax.
Questions
It can, but the wall vent it needs changes the outside of the house, which takes the Architectural Review Board’s certificate of appropriateness. A cast iron boiler that keeps the chimney leaves the outside alone, which is one reason it can be the simpler swap in town.
If the heat exchanger and the cast iron sections are sound, yes: the circulator, the zone valves, the expansion tank and the relief valve are all repairs. When a section cracks or the exchanger leaks, the boiler is done, and the $99 diagnostic tells you which you have, in writing.
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 Clifton 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.