Open 24/7 for emergencies
Heat pump replacement in Dunn Loring runs $8,499 to $21,650 installed. About 176 owner homes in 22027 heat with electricity, mostly heat pumps.
Price range
$8,499-$21,650
8yrs @ 7.99%
$120/mo
15yrs @ 9.99%
$91/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 HVAC technicians with an electric heat strip kit, the backup heat inside a heat pump’s air handler.
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 as our heating page and the HVAC estimator, for a heat pump and air handler, 2 to 5 ton.
A heat pump system, outdoor unit and air handler, installed
$8,499 to $21,650
or $142/mo at 0% APR for 60 months
A gas furnace and air conditioner together, installed
$8,898 to $23,000
or $148/mo at 0% APR for 60 months
Diagnostic visit, when a repair may do
$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
Might it be a repair? The diagnostic visit is $99, and the tech prices the repair and the replacement side by side. Financing is available, subject to approval.
With Comfort+ membership at $199 a year, the diagnostic visit is included, and half of each repair bill is banked toward replacing that system, up to $1,500.
What’s different in Dunn Loring
Electricity heats about 176 of the 627 owner homes in ZIP 22027, a little over a quarter, and the Census files a heat pump under electric heat; most of the rest, about 426, burn gas. So a heat pump job here comes in two shapes: an all-electric house replacing its heat pump and air handler, or a gas house putting one where the air conditioner sat.
What a heat pump faces here is the winter recorded at Vienna’s weather station, 3.6 miles west: a January average low near 23 degrees, roughly 99 nights a year at or below freezing, and close to four at 10 degrees or below. Recent winters went further. In January 2025 the air fell into the single digits for several nights, and late January 2026 brought Extreme Cold Warnings to Fairfax County on three nights. The outdoor unit feels the air temperature, not the wind chill, and nights like those are when a tired heat pump leans on its backup strips.
So the size and the model get chosen for those nights, not for July. A heat pump built for colder climates keeps more of its output in the teens and single digits, and the thermostat gets set so the strips come on only when the outdoor unit can’t keep up.
In the gas houses, the heat pump goes on the old air conditioner’s pad, heats through the mild days and passes the coldest nights to the furnace. Washington Gas, the gas company for most of Fairfax County, counts that as dual fuel in its Virginia rebate program only when the heat pump replaces an existing central air conditioner, so an all-electric 22027 house trading heat pump for heat pump sits outside it. Our dual fuel guide lays out the terms.
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise. A heat pump counts as electric heat.
ZIP 22027 as a whole: every Dunn Loring address. The Dunn Loring Census place is bigger: about three in four of its homes have Vienna mail.
When it’s time
If the backup strips run on ordinary nights in the twenties, not just the few single-digit ones, the outdoor unit has lost capacity or the thermostat calls them too early. A $99 diagnostic visit tells which before anyone prices a new system.
A heat pump can go where the air conditioner sat, heat on mild days and leave the cold nights to the furnace. That’s dual fuel.
It heats all winter and cools all summer, so it piles up hours an air conditioner never sees. Past 15 years, price the replacement beside any big repair.
Permits, locally
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 for its heating output at 17 degrees and at 5 from the maker’s published data, beside your house’s heat loss. That tells you how many of the Vienna station’s four or so nights a year at 10 or below the strips will carry.
Copying the old nameplate repeats whatever guess was made when the house was built. The wrong size runs worse in both seasons.
A heat pump system is the outdoor unit plus the air handler inside. Ask whether the quote covers both, matched, in writing.
Set wrong, the electric strips run on mild days. Ask who programs the thermostat and at what outdoor temperature the strips may come on.
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.
SwiftPro came today to install our new HVAC system and they were fantastic. They were super courteous and well organized and kept the whole place clean and tidy the entire time. The price was reasonable and the whole experience was amazing. Highly recommend them!
Where we work
Next door to Dunn Loring: Vienna, Falls Church, McLean, Annandale and Oakton.
Questions
Usually not. On the roughly 99 freezing nights a year, frost builds on the outdoor coil and the heat pump reverses for a few minutes to melt it, sending up steam. A unit that ices over solid and stays that way is worth a $99 diagnostic visit.
Up off the ground. The January 2016 blizzard left 23 to 31 inches across Fairfax County, and the new unit has to drain its defrost water, so it belongs on a raised stand, clear of the roof’s drip line.
$8,499 to $21,650 installed for a heat pump system, the outdoor unit and the air handler, 2 to 5 ton. A small single-stage system lands near the bottom, a big variable-speed one near the top. The HVAC estimator narrows it to your house.
A heat pump system runs $8,499 to $21,650 installed; a gas furnace and air conditioner together, $8,898 to $23,000. No gas line usually means a heat pump. With gas, you can keep the furnace and add one; our heat pump vs gas furnace guide runs the numbers.
Ready when you are
Call, or send the form at the top. The price is in writing before the old unit comes out, and if a repair makes more sense, 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 Dunn Loring 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.