Open 24/7 for emergencies
Furnace and AC replacement in Aldie runs $8,898 to $23,000 installed. Most pairs here are young; Stone Ridge’s 2000s originals go first.
Price range
$8,898-$23,000
8yrs @ 7.99%
$126/mo
15yrs @ 9.99%
$96/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
One of our technicians with a new Trane outdoor unit he just installed beside a Northern Virginia house.
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
$8,898 to $23,000 installed for a furnace and air conditioner replaced together, 2 to 5 ton, from the same price book as our estimator. Where you land depends on the size of the house, the efficiency you pick, and what the ductwork and venting need.
Furnace and AC together, installed
$8,898 to $23,000
or $148/mo at 0% APR for 60 months
Furnace alone, keeping your AC
$4,285 to $14,040
or $71/mo at 0% APR for 60 months
Heat pump system instead
$8,499 to $21,650
or $142/mo at 0% APR for 60 months
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 estimator gives your house its own number. Then we measure, and the price is in writing before anything is ordered.
Two years of labor come with every install. Monthly plans are on our financing page.
What’s different in Aldie
Across 20105 the median owner home went up in 2013, which makes a typical Aldie furnace and air conditioner twelve or thirteen years old. Pairs that age usually earn a repair, not a replacement. Stone Ridge runs older: its median owner home is from 2009, and half its owner homes are older still, so the pairs that came with those houses are the ones reaching their late teens.
From 2010, new R-22 could only be made for equipment built before then, so an original system in a Stone Ridge house finished in 2009 or earlier may still run on it. A new outdoor unit needs a coil to match, and that coil sits on a furnace just as old as the condenser, so on a pair like that, doing both is one install instead of two a few winters apart.
Not every Aldie house has a furnace to replace. About 15 percent of owner homes heat with electricity, which in a house this new usually means a heat pump and an air handler, and there the like-for-like job is a heat pump system, $8,499 to $21,650 installed. Stone Ridge sits nearer 11 percent, so more of the electric houses are outside it. About one owner home in twenty burns propane instead, priced the same way as gas, with the furnace set up for propane.
The townhouses, more than half of Stone Ridge, tuck the furnace into a closet or attic space and set the condenser on a pad a few feet from the neighbor’s. Getting the old pair out and the new one in through the same hatch is part of the quote. In the condo buildings, the association documents say who owns which half.
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
On an original Stone Ridge pair, that’s the signal. Refrigerant added to a leaking system lasts until it leaks out again, and the furnace under the coil is just as old. Put both repair prices beside the replacement range before paying for either.
Plenty of houses built since 2000 still run the builder’s furnace and AC. They wear out on about the same schedule, so when one goes, price the pair.
A new outdoor unit needs a matching coil, and on a gas system the coil sits on the furnace. If the furnace is as old, do both and open that closet once.
Permits and sign-offs
Loudoun County requires a permit to swap a gas water heater or furnace. Since October 2025, a replacement that keeps the same BTUs in the same spot needs no plans. Source.
Our Virginia Class A contractor license, 2705192276, is on the side of the van.
Choosing who installs it
Ask every company that quotes the job, us included.
Stone Ridge, Kirkpatrick Farms' own review committee, a condo board, or the county’s historic district in the old village along Route 50: each may have a say over the outdoor half. Whoever quotes the job should ask before picking a spot for the condenser.
The old size is a guess somebody made years ago. Ask whether they measure the house and check the ductwork first. Too big short cycles; too small runs all afternoon in August.
Furnace, outdoor unit, matching coil, refrigerant lines, thermostat, permit and hauling the old one away. If it isn’t on the paper, ask.
Our free second opinion looks at the system you were quoted on and tells you what it actually needs, with our price if you want it.
Two of our crew going over a work order before the day's calls.
The system we put in first
Built to take a beating. Put in by our crew.
Heat lamps, snow and rain on one outdoor unit: that’s Trane’s own film. We’re a Trane Comfort Specialist, on Trane’s own dealer locator, and when you pick a Trane, our crew puts it in.
Films: Trane’s own.
From our Google reviews
5.0 stars across 1,132 reviews. Read them on our reviews page.
Oscar and Ndung were great technicians for our HVAC install! Very knowledgeable and friendly. Would recommend them to others!
Where we work
Next door to Aldie: Haymarket, Middleburg, Ashburn, Catharpin and Chantilly.
Questions
Probably not yet. A system that age most likely runs on R-410A, which can still be serviced, and what fails at that age is usually a part, not the whole system. The diagnostic visit is $99, with the repair priced in writing before any work.
It can, with a step first in Stone Ridge: an approved unit replaced where it sits needs no application there, but a moved or added one does, and it goes on a ground-level pad placed to keep its sound and its looks from the neighbors. In the old village, the county’s historic district reviews most outside changes first.
$8,898 to $23,000 installed for the pair, by size and efficiency. A furnace alone, keeping your AC, is $4,285 to $14,040. The HVAC replacement estimator gives your house its own number.
No. If the AC is young and only the furnace failed, replace the furnace. If they’re the same age, do both: a new outdoor unit needs a matched coil, and one built for the old refrigerant isn’t rated for the new one.
Ready when you are
Call, send the form at the top, or take the HVAC replacement estimator first. We measure before we quote, and if a repair makes more sense than a new system, 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 1,132 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.