Open 24/7 for emergencies
Furnace replacement in Amissville, propane or gas, comes to $4,285 to $14,040 installed. For oil houses we price the switch.
Price range
$4,285-$14,040
8yrs @ 7.99%
$61/mo
15yrs @ 9.99%
$46/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
Two of our heating technicians beside a gas furnace, the cooling coil on top of it and the water heater to the right.
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 gas furnace on its own, 2 to 5 tons, keeping the air conditioner you have. A single-stage furnace in a small house sits near the bottom; a modulating one in a big house, near the top.
A gas furnace alone, keeping your air conditioner, installed
$4,285 to $14,040
or $71/mo at 0% APR for 60 months
A furnace and air conditioner together, installed
$8,898 to $23,000
or $148/mo at 0% APR for 60 months
Repair 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, at no charge, before anything is ordered.
Natural gas or propane, in a house, a townhouse or a condo, we replace them all. Oil furnaces we don’t.
What’s different in Amissville
Propane heats the largest share of ZIP 20106: about four owner homes in ten, against a bit over a third on electricity, about one in eight on oil and about two in a hundred on utility gas. A new furnace here is usually a propane one, which means it has to be set up for that fuel, and its gas connection leak tested, before it lights.
In ZIP 20106 the median owner home is a 1993 build. A furnace original to a house from 1980 through 1999, about a third of the ZIP, has been through three decades of winters. The heat exchanger decides it: a crack there can’t be repaired. A diagnostic visit is $99, and the tech prices the replacement beside any repair, so you see both numbers before you choose.
Swapping a gas or propane furnace is permit work on all three sides of the ZIP, because the state building code’s exemption stops at appliances that burn gas or oil. Rappahannock County’s Building Office, at 311 North Gay Street in Washington, takes the application on that side. Culpeper County’s Building Department, at 302 North Main Street in Culpeper, takes it online or in person. Fauquier County asks for one on any fuel-fired appliance, even in the same spot.
About one owner home in eight heats with oil. We don’t work on oil burners, so a house on oil is a switch: a propane furnace, a furnace and AC pair at $8,898 to $23,000, or a heat pump system. The new equipment has to meet real cold, 4,836 heating degree days a year at the Boston station and 3 degrees at Sperryville on January 27, 30 and 31 of 2026. The heating page lays out the options.
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
ZIP 20106 as a whole: about half its homes are in Culpeper County, about four in ten in Rappahannock County, where the village is, and a few in Fauquier County.
When it’s time
A part is a fair fix on a furnace that’s otherwise sound. When repairs pile up on one from 1980 through 1999, you keep paying for equipment whose heat exchanger is the part that matters. With 4,836 heating degree days a year, finding that out on one of the nights near 10 degrees is the hard way.
We replace propane furnaces as well as natural gas ones. The new furnace is set up for propane before it’s lit, and the quote is written for your house.
It’s the wall that keeps the burner’s exhaust out of the air the furnace blows through the house. Nobody patches one; a crack ends the repair conversation.
Permits, locally
Virginia’s building code lets a home’s mechanical appliance be replaced without a permit only when it isn’t fueled by gas or oil, so in Rappahannock County a gas or propane furnace swap is permit work. 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.
Outside the town limits, Fauquier County issues the permit. It wants one for any fuel-fired water heater, propane included, and for any heater being moved; an electric one swapped for a similar unit in the same spot counts as an ordinary repair. Trade permits go out over the counter the day the application comes in. Source.
Our Virginia Class A contractor license, 2705192276, is on the side of the van.
Choosing who installs it
Questions to ask anybody who quotes you, us included.
Ask whether the quote covers converting the furnace to propane and testing the new gas connection for leaks, and whether your propane supplier needs a heads-up. Get the whole job in writing before the old furnace comes out.
Ask how they picked the size. Copying the old nameplate repeats whatever was guessed when the house was built.
A new furnace has to work with the coil and the outdoor unit already there. Ask whether they looked at both before quoting a furnace on its own.
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 1,132 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!
Questions
Then the job is a switch. We don’t work on oil burners, but we do price a propane furnace, a furnace and AC pair, or a heat pump system in its place. About one owner home in eight in ZIP 20106 heats with oil, and the quiz on the heating page prices each option for your house.
Compare the two data plates. If the outdoor unit is clearly younger, the furnace can go in alone, and its new coil has to fit the unit you keep. If both date from the same year, they’ve aged together, and a furnace and AC pair at $8,898 to $23,000 installed is worth pricing beside the furnace alone.
$4,285 to $14,040 installed for a gas furnace on its own, keeping the air conditioner you have; size and efficiency set where yours lands. A furnace and air conditioner together run $8,898 to $23,000. The HVAC replacement cost estimator gives your house its own number.
Fix the small parts on almost any furnace. Past fifteen years, with a repair over a third of the price of a new one, replacing usually wins. Not sure which you’re looking at? The diagnostic visit is $99, and the tech prices the repair before starting it.
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 furnace 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 Amissville 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.