Open 24/7 for emergencies
A new central air conditioner off post at Fort Belvoir runs $5,942 to $14,450 installed, keeping the gas furnace. Cook Inlet’s are past twenty.
Price range
$5,942-$14,450
8yrs @ 7.99%
$84/mo
15yrs @ 9.99%
$64/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 1,131 reviews
One of our HVAC technicians moving a new condenser up a driveway, the van behind him.
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
The same price book our estimator runs on, for a central air conditioner on its own, keeping the furnace you have. A single-stage unit on a small house sits near the bottom; a variable-speed one on a big house, near the top.
A central air conditioner alone, keeping your furnace, installed
$5,942 to $14,450
or $99/mo at 0% APR for 60 months
An air conditioner and furnace together, installed
$8,898 to $23,000
or $148/mo at 0% APR for 60 months
A heat pump in the AC’s place, installed
$8,499 to $21,650
or $142/mo at 0% APR for 60 months
Diagnostic visit, if it may be worth fixing
$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
The HVAC replacement cost estimator narrows it to your house. Then a tech measures, and you get the installed price in writing before anything is ordered.
With Comfort+ membership at $199 a year, the diagnostic visit is included, and half of each repair bill is banked toward replacing that system, up to $1,500.
What’s different in Fort Belvoir
Outside the fence, most houses with Fort Belvoir mail sit in Cook Inlet, and Fairfax County’s records date nearly all 256 of them to 2002 through 2004, each built with central air. An outdoor unit from those years most likely left the factory charged with R-22. Production of that refrigerant ended in 2020, so a leak gets topped off from a shrinking supply while the copper and the indoor coil keep aging. The federal energy department plans on about 18 years for a central AC in this climate. A builder original here is past twenty.
The county shows a gas connection at all 256 Cook Inlet lots, which is why an AC on its own is the usual job. The basement furnace keeps the heating, and the new condenser gets a new cooling coil that sits on top of that furnace and uses its blower. A furnace from the same week as the AC is just as old, though, so its label deserves a read before anyone quotes the condenser alone. Bigger detached houses often add an attic system for the top floor, priced as its own AC.
Cook Inlet’s 108 townhouses set the condenser in a small back yard or beside a deck, so the replacement has to fit the old one’s spot and keep its clearances. Then the paperwork. Fairfax County lists replacing a cooling system as mechanical permit work, and because new air conditioners run on the newer A2L refrigerants, the county also asks for an A2L refrigeration system certification with that permit. Swapping a 2003 R-22 unit means both. Ask the installer to name the new refrigerant, the permit and who files the certification, all on the written quote.
Backlick Road in Accotink is the other side of 22060. The county shows gas unavailable to 18 of its 19 lots, on houses it dates from 1900 to 2010, so a furnace with central air is the exception there. Without a gas line the cooling usually comes from a heat pump, and a worn out heat pump gets replaced as one, $8,499 to $21,650 installed. A propane furnace with an AC is the case for an AC-only swap. On post, The Villages at Belvoir keeps up the heating and cooling in family housing, some of it geothermal.
When it’s time
A Cook Inlet condenser that wants a top-off every summer is leaking, and on a builder unit from 2002 to 2004 that’s R-22 going out. Each refill buys a season at best, the coil and copper are as old as the leak, and the compressor is next. When the recharge quote looks like a down payment, price the new AC beside it.
It’s the pump at the heart of the outdoor unit and its costliest part. Out of warranty on an older unit, the repair can come close to half the price of a new AC, the point where Goodman says replacing may be the better money.
The Department of Energy plans on about 18 years for a central air conditioner in Virginia’s climate. Past fifteen, parts get harder to find and each repair buys less time.
Permits, locally
Our Virginia Class A contractor license, 2705192276, is on the side of the van.
Choosing who installs it
Questions to ask anybody who quotes you, us included.
In Cook Inlet the furnace and the air conditioner usually went in the same year. A quote for the condenser alone, written without a look at the basement furnace, skips half the decision. Ask the tech to read both labels, tell you the furnace’s age plainly, and put the AC-only price beside the pair at $8,898 to $23,000.
Ask how they picked the size. Copying the old nameplate repeats whatever was guessed when the house was built.
The outdoor unit and the coil on the furnace are rated as a pair. Ask whether the quote replaces both, and what happens to the line set.
A good company puts the repair price next to the replacement range and lets you choose. Already holding somebody’s big number? Take the free second opinion first.
Two of our crew going over a work order before the day's calls.
From our Google reviews
5.0 stars across 1,131 reviews. Read them on our reviews page.
They replaced my AC system and got it up and running with great service. Moises and Efrain are great!
Where we work
Next door to Fort Belvoir: Lorton, Springfield, Alexandria, Woodbridge and Fairfax Station.
Questions
The Villages at Belvoir, the Army’s Residential Communities Initiative partner, runs the family homes on post, cooling included, and residents put repairs in as a service request with The Villages. We don’t replace equipment there. Off post, a Cook Inlet or Backlick Road house is ours to measure, and a $99 diagnostic says first whether it’s still a repair.
The air conditioner belongs to the owner, who usually approves and pays for a new one, so start with your landlord or property manager; many leases spell out who calls. Renters held about a third of Cook Inlet’s homes at the 2020 Census. The tech can measure with you there, and the written price goes to whoever signs.
$5,942 to $14,450 installed for a central air conditioner on its own, keeping the furnace you have; size and efficiency set where yours lands. An AC and furnace together run $8,898 to $23,000. The HVAC replacement cost estimator gives your house its own number.
It’s worth pricing. A heat pump cools exactly like an AC and also heats on mild days, so with your gas furnace it becomes dual fuel. A heat pump system runs $8,499 to $21,650 installed, and we’ll price it both ways.
Ready when you are
Call, or send the form at the top. A tech measures the house and puts the installed price in writing before anything is ordered, and if the old AC is worth fixing, you’ll hear that first.
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 Fort Belvoir and the rest of Northern Virginia. Virginia contractor license #2705192276. 5.0 stars across 1,131 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.