Open 24/7 for emergencies
Furnace and AC replacement in Philomont runs $8,898 to $23,000 installed; a heat pump system for an electric house is $8,499 to $21,650.
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
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 1,132 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 Philomont
Propane and electricity each heat about 42 percent of owner homes in the Purcellville ZIP area that Philomont’s Census figures come from, and the Census counts a heat pump as electric heat. That makes two jobs. A propane house replaces a furnace and an air conditioner together, $8,898 to $23,000 installed. An electric house often replaces one heat pump system, $8,499 to $21,650 installed, and the HVAC estimator gives your house its own number.
The median owner home dates to 2000, so an original pair has run into a third decade. About 48 percent of homes there went up since 2000, which puts many systems in middle age, and roughly a quarter date from before 1980. When the furnace and air conditioner are the same age and both are failing, doing both is one project. When the air conditioner is newer, the furnace alone is $4,285 to $14,040 installed.
Winter sets the weight of the job. The Purcellville station counts 4,942 heating degree days against 1,050 cooling, and its January low averages 24.5F. Philomont logged a low of -2F on January 23, 2025, so a heat pump here has to carry January. Summer is no rest either: 30.2 days a year reach 90F, and western Loudoun saw heat indices above 110F on July 28, 2023.
Oil heats about 6 percent of owner homes in the ZIP area. Oil burners are outside our work, yet a heat pump or a propane furnace can take that burner’s place, and both are ours to price. About 85 percent of homes in the ZIP area are detached houses, so an outdoor unit can usually sit on its own lot, away from a shared wall.
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
Philomont’s own ZIP, 20131, is post office boxes only, so the Census Bureau maps no area for it. These are ZIP 20132 as a whole, the Purcellville ZIP area Philomont sits in, the Town of Purcellville included.
When it’s time
In a Philomont house from around the 2000 median year, the furnace and air conditioner have aged together, so a repair on one is worth weighing against the other. The diagnostic visit is $99. A repair price set beside the replacement range tells you which half deserves the money.
Where a lot of homes heat with electricity, the indoor half is often an air handler, and the like-for-like swap is a heat pump system, $8,499 to $21,650 installed.
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.
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.
A propane furnace with a new air conditioner and a heat pump system are different jobs with different ranges. If you are unsure, ask for both priced side by side, and ask that the quote show where the outdoor unit would sit.
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.
I would highly recommend SwiftPro for an HVAC replacement. The sales process was straightforward and fair and the installation was done to my satisfaction in a timely and complete manner (and I’m pretty demanding). Great job!
Where we work
Next door to Philomont: Middleburg, Round Hill, Bluemont, Purcellville and Hamilton.
Questions
Look at the air conditioner’s age first. If it is the newer half, the furnace alone, $4,285 to $14,040 installed, leaves it in place. If both date from the same year and one has already begun failing, the pair at $8,898 to $23,000 is a single project, not two.
Our heating page links the HVAC estimator, which asks a few questions about your house and gives it its own number. The ranges here come out of that price book, and the estimator narrows them to your size, fuel and system.
$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 Philomont 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.