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Furnace and AC replacement in Casanova runs $8,898 to $23,000 installed: a propane furnace inside and an outdoor unit built to ride out Fauquier summers.
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 Casanova
Where a Casanova house has a furnace and central air, that furnace burns propane: across ZIP 20119, the Census area around the village, no owner home heats with utility gas. The two halves share more than a thermostat. The cooling coil sits on the furnace’s outlet and the furnace’s blower pushes the summer air too, so a pair bought together is matched end to end and both come out of the same closet or crawlspace in one job.
Summers here are long enough to wear an air conditioner down. Warrenton 3 SE, the NOAA normals station a few miles west-northwest, averages about 21 days a year at 90 or hotter. On July 20 and 21, 2019 the Weather Service put heat index values above 110 across southern Fauquier, and on July 22, 2011 it estimated them past 115. An outdoor unit that’s been patched through a few of those summers is usually the half that goes first.
The outdoor half also takes the storms. On August 13, 2021, gusts estimated near 70 mph brought down numerous trees by Casanova Road and Meetze Road, about a mile west-northwest of the village. The low roads around it flood: Rogues Road closed for high water in November 2020, and on July 16, 2025 at least a foot of water ran across Balls Mill Road near Moopack Lane. After a storm like those, look the outdoor unit over before switching the cooling back on, for limbs on the cabinet, a kinked copper line or water that reached its electrical box, and call us to check it all.
The village houses went up from roughly 1880 to 1910, built for stoves and fireplaces, so any central system in one came decades later, its ducts fitted wherever there was room. Out along the farm roads the houses are mostly younger: the typical owner home across ZIP 20119 dates from about 1990. A furnace and outdoor unit original to a house that age are both well past the years either usually lasts.
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
Casanova’s own ZIP, 20139, is post office boxes only, so the Census Bureau maps no area for it. These are ZIP 20119 as a whole, the Catlett ZIP area Casanova sits in.
When it’s time
A falling branch can fold the cabinet, flatten the coil or snap the copper, and the refrigerant is gone the moment a line opens. The $99 diagnostic visit sorts out whether the outdoor unit can be fixed, needs replacing alone, or is the moment to replace the pair.
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.
The label on its side names the refrigerant. R-22 hasn’t been made or imported in the US since 2020, so a leak gets expensive. Replace it on your schedule, not in July.
Permits and sign-offs
Fauquier County counts swapping an electric appliance for a similar one in the same spot as an ordinary repair that needs no permit. Moving an appliance to a new spot takes one. Source.
Fauquier County wants a permit for any fuel-fired appliance, so a gas or propane furnace replacement is permit work even in the same spot. Trade permits need no plans, and usually no zoning approval. 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.
On a Casanova lot that means clear of trees that could drop a limb on it, out from under a metal roof’s eave where the snow slides off, and up off any ground where rain collects. Ask to see the spot and the pad or stand height before the work starts.
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.
David and the install team that came over were friendly, knowledgeable and professional. Happy with the install of my Trane system. Tyler was a pleasure to work work with in getting me the best price. He’s got a good thing going over there. I’m glad I went with them!
Questions
It’s worth pricing. A heat pump does all the cooling, heats through the mild months and leaves the coldest mornings to the propane furnace. A full heat pump system with an air handler is $8,499 to $21,650 installed, and the HVAC replacement estimator prices your house both ways.
FEMA’s flood map puts the village crossroads in its minimal hazard zone, but it maps a Zone A floodplain along Turkey Run by Meetze Road. If rain has ever pooled where the condenser sits now, set the new one on a stand above that mark. A furnace in a crawlspace that has taken water needs the same thinking: its control board shouldn’t sit where water can reach it.
$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 Casanova 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.