Furnace and AC replacement in Philomont.
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.
- Your price range up front
- Sized to the house, not the old label
- Dedicated HVAC team
Get your new system priced
Two kinds of Philomont house, two jobs: a propane pair or a heat pump.
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.
Philomont houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
Philomont
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.
- Median home built2000 Census
- Built before 1980about 2 in 10 Census
- Built since 2000about 5 in 10 Census
- Most homes aresingle-family houses, about 8 in 10 Census
- Heated withelectricity, about 4 in 10 Census
- Rentedabout 1 in 10 Census
- A few homes still burn heating oil. We don’t work on oil burners, but a switch to a heat pump or a gas or propane furnace is ours to price.
- Electric heat here usually means a heat pump with backup strips, which is priced as a heat pump system, not a furnace and AC.
What a new furnace and AC costs in Philomont.
$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
- Furnace alone, keeping your AC$4,285 to $14,040
- Heat pump system instead$8,499 to $21,650
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.
When replacing both makes sense in Philomont.
Both halves are original to the house
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.
Your heat may not be a furnace
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.
Both halves went in with the house
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.
Who signs off on a new system in Philomont.
Loudoun County
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.
How to pick who replaces your furnace and AC in Philomont.
Ask every company that quotes the job, us included.
Does the quote name the fuel you burn now and the one you would after?
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.
Do they size it to the house, or copy the old label?
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.
Is the whole job in the written price?
Furnace, outdoor unit, matching coil, refrigerant lines, thermostat, permit and hauling the old one away. If it isn’t on the paper, ask.
Already holding another company’s quote?
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.
What our customers say.
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!
5.0 stars across 884 Google reviews. Read them on our reviews page.
Furnace and AC replacement questions from Philomont.
Do I replace the furnace and the AC as a pair, or one at a time?
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.
How do I get a number for my own house?
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.
How much does a new furnace and AC cost in Philomont?
$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.
Do I have to replace both at the same time?
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.
Furnace and AC replacement in the towns next door.
- Furnace and AC replacement in Middleburg
- Furnace and AC replacement in Round Hill
- Furnace and AC replacement in Bluemont
- Furnace and AC replacement in Purcellville
- Furnace and AC replacement in Hamilton
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Start with your number, then a written quote.
Call, book online, 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 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 884 Google reviews. SwiftPro maintains a dedicated HVAC team and a dedicated plumbing team.
SwiftPro Heating, Cooling & Plumbing, 4230 Lafayette Center Dr, Suite N, Chantilly, VA 20151, (703) 997-9757. Book online, read our reviews, or see every town we serve.