Open 24/7 for emergencies
AC replacement in Aldie runs $5,942 to $14,450 installed. With gas heat in most homes here, the furnace usually stays put.
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 Aldie
Gas heats close to eight in ten owner homes across 20105, and in Stone Ridge it’s nearer 86 percent. In a gas house the air conditioner is two pieces hung off the furnace: the condenser on its pad outside and a coil on top of the furnace cabinet, borrowing its blower. When the condenser is the piece that quits, the furnace stays, and a new outdoor unit goes in with a coil built to match it. In a ZIP this heavy on gas, that’s the swap most houses need.
Then there’s age. The median owner home in 20105 went up in 2013, so a typical original air conditioner here has a dozen or so summers on it, well short of the roughly 18 years the Energy Department figures on for central air in this climate. Systems that young run on R-410A, which can still be serviced, so a leak or a tired fan motor is usually worth fixing. On a house from the 2010s, the $99 diagnostic comes first, the repair written down beside the replacement range.
Stone Ridge is where the originals run out first. Its median owner home dates to 2009, and the switch from R-22 to R-410A came at the start of 2010, so a condenser that came with one of the earlier Stone Ridge houses may still hold R-22. That refrigerant went out of production in 2020, which turns a leak into a decision. The furnace under that coil is the same age, though, so on a 2009 original it’s worth pricing the pair, $8,898 to $23,000, beside an AC alone, and picking with both numbers in front of you.
Stone Ridge is mostly townhouses, 56 percent of its homes, each condenser on a small pad behind the unit with the neighbor’s a few feet off. The association’s design standards keep a same-spot swap simple: an existing approved air conditioner can be replaced with no application. A new pad, an added unit or a move needs an approved application before the install. In the old village along Route 50, the county’s historic district reviews most exterior changes before work starts, so a condenser headed for a new spot there gets asked about first.
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
ZIP 20105 as a whole: every Aldie address, inside Stone Ridge and out.
When it’s time
Refrigerant topped off on a leaking system lasts until it leaks out again. On a Stone Ridge condenser from 2009 or earlier, read the label plate on its side panel: if it says R-22, each recharge comes out of old stock, since production ended in 2020. That’s when a $99 diagnostic and the replacement range belong side by side.
At least half the houses here went up since 2010, so the AC is often the original and still young. A young AC is usually worth repairing: get the $99 diagnostic and the repair price before anybody prices a new one.
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.
Choosing who installs it
Questions to ask anybody who quotes you, us included.
In a gas house the new coil sits on your furnace and runs on its blower, so whoever quotes the AC should open the furnace cabinet too. Ask whether the blower can move the air the new system needs and whether the coil fits the cabinet cleanly. It’s a short look, and it belongs on the written 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 Aldie: Haymarket, Middleburg, Ashburn, Catharpin and Chantilly.
Questions
Not unless both are worn out. Some three-story Aldie townhouses run a second system for the bedrooms, its air handler up under the roof, with its own condenser out back. Each is quoted separately, so a failed upstairs unit can be swapped while the lower one keeps running. If both came with the house, get both prices and plan the second.
Probably not. About 15 percent of owner homes in 20105 heat with electricity, and in a house this young that usually means a heat pump doing both jobs, with an air handler where a furnace would be. Replacing that is a heat pump system, $8,499 to $21,650 installed. Propane houses, about one in twenty here, have a furnace, so an AC alone fits them too.
$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 Aldie 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.