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Replacing a McLean furnace and air conditioner together runs $8,898 to $23,000 installed per system. The median owner home here dates from 1975.
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 McLean
Across McLean’s two ZIP codes the median owner home was built in 1975, and in 22101 the 1950s, 60s and 70s together account for more than half of all homes. A house from those years is on its third system at the least. What hasn’t been replaced is the ductwork, sheet metal trunks and branches laid out for the first system and carried over to every one since, so a new pair inherits whatever air path it’s handed.
That’s why a full system job here starts with the ducts and the return. A house that has added rooms since it was built often has more supply registers than its original return can feed, and even a correctly sized system runs short of air on a starved return. We measure it before quoting, and it can change what gets quoted.
The Census puts the median 22101 home at nine rooms or more, and a house that size often runs two systems, a basement pair for the main floors and an attic pair for the bedrooms. Each is its own furnace, coil and outdoor unit, priced on its own. If both went in the same year, they’ve had the same years of wear, and it’s worth pricing the second while the first is being measured.
22102 keeps a different calendar. Its biggest building decade was the 2010s, more than a fifth of all its homes, and systems that new are years from replacement. Its owner homes still have a 1981 median, so plenty of 22102 houses are on their second or third pair too.
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 |
|---|---|---|---|---|
| McLean | 1977 | single-family houses, about 8 in 10 | gas, about 7 in 10 | Second or third systems, often on the original ductwork. |
| Tysons | 1985 | condo and apartment buildings, about 7 in 10 | electricity, about 5 in 10 | Mostly electric heat, so usually a heat pump swap instead. |
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
ZIPs 22101 and 22102 as a whole: every McLean address, Tysons included.
When it’s time
About one home in twelve in 22101 went up in the 2000s. In one still on its builder’s two systems, both furnaces and both outdoor units are seventeen to twenty-six years old. That’s the age to price both pairs before one of them picks a July weekend to quit.
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
Fairfax County lists replacing a heating or cooling system as mechanical permit work. Source.
Fairfax County requires a permit to replace any gas appliance, even like for like: a gas water heater, furnace or boiler. Replacing a fuel-burning appliance also needs a chimney vent certification. Source.
Fairfax County asks for an A2L refrigeration system certification with the permit for any heat pump or air conditioner that runs on the newer A2L refrigerants. 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.
In a two-system McLean house, the basement and attic pairs may differ in age and size. A quote with a line for each lets you replace the worse pair now and plan the other, instead of one number for both.
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.
On spec and on price for our A/C replacement. Showed up on time and all went as promised
Where we work
Next door to McLean: Dunn Loring, Vienna, Falls Church, Arlington and Great Falls.
Questions
A boiler house has no furnace, so its cooling is an outdoor unit and an air handler of its own, usually in the attic. One way to replace that pair is a heat pump system, $8,499 to $21,650 installed, which also gives the attic ducts some heat to carry in spring and fall while the boiler keeps the winter.
Usually the sheet metal itself is sound after fifty years. What gets checked is the return and the joints: whether the return is big enough for the system the house needs now, and whether the seams in the basement and the attic leak air into spaces nobody uses.
$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 McLean 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.