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Woodbridge furnace and AC replacement runs $8,898 to $23,000 installed for the pair. In Lake Ridge and Leesylvania, both halves often wear out together.
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 Woodbridge
More of our Woodbridge calls end in a full system replacement than in most towns we serve. The six Census places behind the Woodbridge address were built in waves: the older core along Route 1 starting in the 1950s and 1960s, Dale City through the 1970s and 1980s, Lake Ridge peaking in the 1980s, Leesylvania and County Center after 2000. Each wave reaches the end of its furnace and air conditioner on its own clock.
Lake Ridge is the clearest example. Four of its homes in ten went up in the 1980s, the median owner home in 1985, so the original pair is long gone and the second, often installed between the late 1990s and 2010, is fifteen to twenty-five years old now. In the gas half of Lake Ridge that’s a furnace and an air conditioner of the same vintage, the outdoor unit most likely on R-22, and the coil a new one needs rides on a furnace just as old.
Leesylvania and County Center sit at the other end. Eight homes in ten there went up after 2000, the median owner home in 2006, and about two owners in three heat with gas. A house from those years still on its builder’s furnace and air conditioner has run both for close to twenty years.
Dale City sits in the middle of that calendar and is its biggest piece: 17,021 owner homes, two in three on gas. More than a quarter of its homes went up in the 1970s, so those houses are usually on a third furnace and air conditioner, on ductwork laid out for the first. Size the new pair to what those ducts can carry, or adjust the ducts, rather than copying the old label.
Neighborhood by neighborhood
Census figures for the owner-occupied homes in each place, and what that usually means for a replacement.
| Place | Median home built | Most homes are | Heated with | What the system usually is |
|---|---|---|---|---|
| Dale City | 1983 | single-family houses, about 7 in 10 | gas, about 7 in 10 | 1980s and 90s houses, most on their second furnace and AC. |
| Lake Ridge | 1985 | townhouses, about 4 in 10 | electricity, about 5 in 10 | Mostly electric heat, so usually a heat pump swap instead. |
| Woodbridge | 1976 | single-family houses, about 4 in 10 | gas, about 5 in 10 | Second or third systems, often on the original ductwork. |
| Leesylvania | 2006 | single-family houses, about 4 in 10 | gas, about 6 in 10 | Many still on the builder’s furnace and air conditioner. |
| Potomac Mills | 1988 | single-family houses, about 6 in 10 | electricity, about 7 in 10 | Mostly electric heat, so usually a heat pump swap instead. |
| County Center | 2006 | townhouses, about 4 in 10 | gas, about 6 in 10 | Townhouse systems: a furnace in a closet or attic, the air conditioner out back. |
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
When it’s time
In Leesylvania or County Center, a builder’s air conditioner that quits after twenty summers usually has a furnace the same age inside. Fix one and wait on the other, and that closet gets opened twice in a year or two.
A new outdoor unit needs a matching coil, and on a gas system the coil sits on the furnace. If the furnace is as old, do both and open that closet once.
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
Prince William County lists any work that alters a home’s heating and air conditioning as permit work, but swapping an electric furnace, heat pump or air conditioning condensing unit for the same type of unit in the same spot is an ordinary repair that needs no permit. Source.
Prince William County requires a permit to replace a gas or propane furnace or a gas appliance such as a water heater, even like for like. Replacing an electric water heater with one the same size in the same spot needs no permit. 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.
Start with facts you can check: the year on the furnace’s plate, and the year and refrigerant on the outdoor unit’s. If the two halves are ten years apart, ask why both are on the quote.
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.
They replaced my AC system and got it up and running with great service. Moises and Efrain are great!
Where we work
Next door to Woodbridge: Dumfries, Lorton, Triangle, Fairfax Station and Quantico.
Questions
Nearly. About half of Lake Ridge owners heat with electricity, and in a 1980s house there that usually means a heat pump outside and an air handler inside. The two get replaced as one system, priced as a heat pump system at $8,499 to $21,650 installed. The HVAC replacement estimator asks which kind you have.
Its guidelines put every exterior alteration in front of the Architectural Committee, with satellite dishes, antennas and a few signs the only exceptions. A new unit on the old pad may not count, so ask. A larger pad or a new spot is an application to file before install day.
$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 Woodbridge 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.