Open 24/7 for emergencies
With a propane furnace that stays put in most Waterford homes, AC replacement here runs $5,942 to $14,450 installed for the cooling alone.
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 Waterford
Propane heats more than half the owner homes in ZIP 20197, and the Census finds none on natural gas. That makes a propane furnace the usual partner for an air conditioner here: the condenser outside, a coil on top of the furnace, the furnace’s blower moving the cooled air. A worn-out condenser comes out along with its old coil, a matched new pair goes in, and the furnace below is left alone. The all-electric houses, about 23 percent, are a separate job: their outdoor unit tends to be a heat pump, priced as a whole system at $8,499 to $21,650.
Thirty years is the number to keep in mind. The ZIP’s median owner home dates to 1996, so an original condenser has run about that long, and one of that vintage was built for R-22. More than one in five owner homes predates 1960, and in those, central air came long after the house did: ducts threaded through closets and floors, an indoor coil fitted wherever it would go. A replacement in a house like that gets the ducts and the coil’s spot looked at before anyone picks a size.
The village grid runs down a slope from the farm fields above High Street to the Catoctin Creek floodplain below Second Street, and some village parcels sit inside the 100-year floodplain. The creek has made its point: the South Fork gauge at Waterford rose to 11.11 feet in August 2020, three feet past flood stage, and topped flood stage again in 2015, 2018 and 2022. On a low lot, a new condenser belongs on a raised pad or stand, and one that has been underwater gets its wiring checked before it runs again.
Nearly every owner home in 20197 is a detached house, 98 percent, so the condenser usually has a yard to itself, and the hazard is what grows over it. The June 2012 derecho, with winds estimated near 76 mph, snapped many trees along Thicket Court, and on July 16, 2025, gusts near 61 knots brought trees down in Waterford. When the old unit comes out, its spot is worth rethinking: out from under the big limbs, on ground that stays dry, and close enough to the propane furnace that the copper run stays short.
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
ZIP 20197 as a whole: every Waterford address, the village included. The Census place for the village alone has too few homes for steady figures.
When it’s time
In a house that got central air long after it was built, the upstairs supply runs are often long and narrow, and a tired condenser makes that worse. Before replacing, have the $99 diagnostic check the refrigerant charge and the airflow. If the ducts are the bottleneck, a new AC alone won’t fix the bedrooms, and the quote should say so plainly.
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.
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.
Some Waterford parcels lie inside the 100-year floodplain, and the creek has topped flood stage again and again since 2015. An installer setting a new condenser on a low pad should ask where the water reached in August 2020 and price a raised stand if it came close. A quote that just reuses the old pad hasn’t asked.
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 Waterford: Paeonian Springs, Lovettsville, Hamilton, Leesburg and Purcellville.
Questions
Inside the central village, likely if the outdoor unit moves or changes how the house looks, since most exterior changes in Loudoun County’s Waterford Historic District need the Historic District Review Committee’s approval before work starts. Ask before ordering, with the new unit’s size and spot in hand. The National Historic Landmark around the village is larger, and that designation is honorary.
Not for its age alone. A thirty-year-old condenser that still cools can keep going until a big part fails; what changes the math is a leak, a dead compressor or a coil that’s corroding. Plan instead: get the replacement range now, call for the diagnostic the day it falters, and pick the new unit in a mild month, not on one of the 30 or so days a year that reach 90.
$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 Waterford 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.