Open 24/7 for emergencies
Expect $5,942 to $14,450 installed for Bristow AC replacement, with the furnace left where it is. Builder condensers here are closing in on 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
Send this and the office calls or texts you back to set a time.
We’ll call or text this number about your request. By sending it you agree to our terms and privacy policy.
Rather talk now? (703) 997-9757
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 Bristow
Most of Bristow went up in one long run: in 20136, 5,558 of the 9,619 homes the Census sorts by decade were finished from 2000 through 2009. That run crossed the refrigerant change. A condenser built before 2010 most likely holds R-22; one from the last years of the boom, or anything newer, most likely R-410A. So next-door neighbors can need different answers, and the plate on your outdoor unit, naming its year and refrigerant, is what we read first.
R-22 hasn’t been made since 2020, so a refill on an older unit comes out of reclaimed stock at that summer’s market price, poured into a machine near the end of its expected life. The replacement runs an A2L refrigerant, so the furnace-top coil gets swapped along with the condenser. An R-410A unit from the 2010s is still serviced, so the $99 diagnostic visit prices that repair first.
Bristow is AC-only country. Gas heats close to nine in ten Linton Hall owner homes, and a good share of the build-out furnaces have been swapped already, many for high-efficiency models venting through plastic pipe in a side wall. If yours is one, and the condenser outside is still the 2000s original, you don’t need a whole system: the new AC and its coil go on the younger furnace. Two originals? Then get a quote for both halves, $8,898 to $23,000, to weigh against it.
About three in ten Bristow homes are townhouses, 609 of them in Victory Lakes alone, and behind a garage townhouse the outdoor unit often lives under the deck or in a strip of yard between neighbors. To the county, the same type on the same spot is a repair, no permit. Move it and the county is back in the picture, and in Victory Lakes the Covenants Committee reviews changes to the outside of the house first.
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
When it’s time
Read the plate inside the furnace door, then the one on the outdoor unit. In plenty of Bristow houses the furnace got replaced in the last decade while the condenser is still the builder’s, stamped around 2004. That’s the house an AC-only job was made for.
An air conditioner put in before 2010 most likely holds R-22, which hasn’t been made since 2020. A leak on one of those usually ends the repair road.
A house from the 2000s often cools with the condenser it was built with. Past fifteen years, compressors and fan motors start to go, one after another.
Permits, locally
Prince William County lists any work that alters a home’s heating and air conditioning as permit work, but swapping an electric furnace, heat pump or air conditioning condensing unit for the same type of unit in the same spot is an ordinary repair that needs no permit. Source.
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.
The new coil moves its air with your furnace’s blower. A furnace replaced in the 2010s may run a two-stage AC well; a builder original is often matched best by a single-stage one. Ask them to read the furnace’s model number before they quote.
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.
Tyler from SwiftPro is very knowledgeable and professional on HVAC. Tech Edis and Rony are very professional and done good job to install AC
Where we work
Next door to Bristow: Nokesville, Manassas, Gainesville, Catharpin and Centreville.
Questions
Not when the new outdoor unit is the same type on the same spot; the county lists that as an ordinary repair. A condenser on a new pad, or an AC traded for a heat pump, isn’t that swap, and in Victory Lakes a new pad is an exterior change too.
Probably not on age alone. The 1,690 homes finished in 20136 from 2010 on came with R-410A or a newer refrigerant, still serviceable, so a leak or a failed part is a repair question first. The diagnostic visit is $99, with the repair price set beside the replacement range.
$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 Bristow 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.