Open 24/7 for emergencies
Replacing a propane furnace in Midland runs $4,285 to $14,040 installed, and your AC or heat pump stays. Utility gas heats 12 of 22728’s 1,066 owner homes.
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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Rather talk now? (703) 997-9757
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 Midland
The Census counts 354 of the 1,066 owner homes in ZIP 22728 heating with bottled or tank gas and just 12 on a utility line, so a new furnace in Midland almost always means a propane unit fed from the tank on your property. Most furnaces ship set for natural gas, so yours gets converted on site and leak checked before it fires.
Across 22728 the typical owner’s house dates from 1986, about one home in five predates 1960, the oldest in the depot village along Midland Road, and roughly a quarter went up since 2000. A furnace that came with a 1980s house was retired long ago. The one there now is usually a second, often from the late 1990s or 2000s, old enough that a cracked heat exchanger or a dead inducer motor tips it toward replacement.
The heating season runs long. Warrenton 3 SE, the NOAA normals station about six miles north-northwest, puts the median first fall freeze on November 1 and the last spring freeze on April 9, and averages close to 13 days a year when the high never climbs past 32. Fauquier County’s code makes 17 degrees the temperature a heating system gets sized against, so the right size comes from your house’s heat loss at 17, not the old nameplate.
Midland is flat, open country, and the Warrenton-Fauquier Airport inside its service district keeps a weather station that measured gusts of 74 mph in August 2021 and 67 mph the next July. A high-efficiency furnace breathes through two plastic pipes out a side wall or the roof, and a hard gust across them can trip the switch that watches the draft and shut the burners off. On an exposed lot the vent belongs on the side the house shelters.
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
ZIP 22728 as a whole: every Midland address, the village included. The Census place for the village alone has too few homes for steady figures.
When it’s time
If a high-efficiency furnace locks out in a gale and runs fine once the wind drops, check the two pipes outside first: a gust across them can trip the pressure switch. Clear any snow or leaves, and book the $99 diagnostic visit if it keeps happening.
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
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
Questions to ask anybody who quotes you, us included.
A high-efficiency furnace makes water as it burns, and Midland houses have no public sewer, so that water needs a planned path: a floor drain, a small pump to a laundry drain, or a line outside that won’t freeze. Ask to see the route, and whether a neutralizer is included.
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.
Rich did a great job. We hit it off very well. He was on time, and we promptly gathered the necessary measurements. He explained all the details. He prepared the estimate while at the house. This work is for a HVAC full replacement.
Questions
Very likely not: about one Midland owner home in a hundred is on a utility gas line. Tell your propane company before install day, and have us confirm the line from the tank can carry the new furnace at full fire.
Colder than the averages suggest. Warrenton 3 SE counts about five nights a year at 10 degrees or below and a night at zero or colder roughly once every two or three winters, and it read 3 degrees on January 7, 2014.
$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 Midland 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.