Open 24/7 for emergencies
Most of ZIP 22039 runs on furnaces, so a boiler here stands out; its tune-up costs $99, a new one $9,900 to $16,500.
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 Fairfax Station
Fairfax Station is a ZIP of detached houses, 5,687 owner homes in 22039, and about eight in ten of them were built from 1980 through 1999, with 1988 the typical year. Houses of that era were built around furnaces and ducts, so a hot water boiler in Fairfax Station usually sits in one of the roughly one in eight homes older than 1980.
Natural gas heats close to six in ten owner homes and electricity about one in three; oil and propane together cover the rest, a few hundred houses with a tank outside. So a boiler here is usually gas, sometimes propane, and the oil ones are outside our work. In a house this size the boiler room is often a basement that was finished later, which makes access the first question: a wall-hung condensing boiler at $12,782 to $16,500 installed can give back floor space a finished basement wants.
On the larger lots west of Ox Road, many houses draw from private wells. A boiler’s fill valve tops up the loop from the house’s water line and holds the loop at its own low pressure, so a well’s ups and downs shouldn’t reach the boiler gauge; when they do, the fill valve is passing water it shouldn’t. We test well water too, so mention the well when you book.
Very few homes here are rented, so the owner usually decides between repair and replacement. A tired expansion tank or a fill valve that won’t shut is a repair; a cast iron boiler with a leaking section is a replacement, kept on its chimney or swapped for a condensing one through the wall. Replacing a gas boiler in Fairfax County takes a permit even like for like, and the County wants a chimney vent certification with any fuel-burning swap. County Fire and Rescue asks for gas appliances to be inspected every fall and a CO alarm on every floor.
Neighborhood by neighborhood
Census figures for the owner-occupied homes in each place, and what a boiler call there usually meets.
| Place | Median home built | Most homes are | Heated with | What a boiler call usually meets |
|---|---|---|---|---|
| Fairfax Station | 1982 | single-family houses, about 9 in 10 | gas, about 5 in 10 | 1980s and 90s houses, mostly forced air; boilers in the older ones. |
| South Run | 1988 | single-family houses, nearly all | gas, about 9 in 10 | 1980s and 90s houses, mostly forced air; boilers in the older ones. |
| Crosspointe | 1993 | single-family houses, nearly all | gas, about 8 in 10 | 1980s and 90s houses, mostly forced air; boilers in the older ones. |
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
ZIP 22039 as a whole: every Fairfax Station address. The Fairfax Station Census place in the table also takes in streets with Fairfax mail.
What it’s telling you
If the boiler’s pressure climbs each time the well pump cycles, the fill valve is letting house pressure into the loop, and left alone that ends at the relief valve. It’s a small valve job, and the $99 visit pins it down.
An aging Peerless cast iron boiler in a Northern Virginia basement, chimney vented, on a SwiftPro service call.
Safety and paperwork
Fairfax County requires a permit to replace any gas appliance, even like for like: a gas water heater, furnace or boiler. Replacing a fuel-burning appliance also needs a chimney vent certification. Source.
Fairfax County lists replacing a heating or cooling system as mechanical permit work. Source.
Fairfax County Fire and Rescue names a faulty gas furnace or water heater as a carbon monoxide source, says to have gas appliances inspected every fall, and to put a CO alarm on every floor. Source.
Fairfax County Fire and Rescue says to have the heating system cleaned and checked by a professional every year, and to keep anything that burns at least three feet from the furnace and the water heater. 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.
On a private well, ask the tech to check the fill valve and the expansion tank together; between them they keep the well’s pressure out of the boiler loop.
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 Fairfax Station: Burke, Clifton, Springfield, Fairfax and Annandale.
Questions
Yes, we test well water, and on a well-fed house it pairs well with a boiler visit, since that same water line feeds the boiler’s fill valve.
If it heats evenly and passes its tune-up, yes: it’s quiet, steady heat. When it does need replacing, the choice is a cast iron boiler on the chimney or a condensing one vented through the wall at $12,782 to $16,500 installed.
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 Fairfax Station 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.