Heat pump replacement in Dunn Loring.
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.
- The installed range, published
- Sized to the house, not the old label
- Dedicated HVAC team
Get your heat pump priced
Dunn Loring heat pumps face about four nights a year at 10 degrees or colder.
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.
Dunn Loring houses, 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.
Dunn Loring
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.
- Median home built1991 Census
- Built before 1980about 3 in 10 Census
- Built since 2000about 2 in 10 Census
- Most homes aresingle-family houses, about 9 in 10 Census
- Heated withgas, about 7 in 10 Census
- Rentedhardly any Census
- Most houses here burn gas, so a heat pump usually means dual fuel: it replaces the air conditioner and the furnace stays as backup.
- Bigger single-family houses often have a second system upstairs, priced on its own.
What heat pump replacement costs in Dunn Loring.
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
- A gas furnace and air conditioner together, installed$8,898 to $23,000
- Diagnostic visit, when a repair may do$99
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.
When a heat pump in Dunn Loring is worth replacing.
Aux heat comes on every frosty night
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.
The AC quit, and you heat with gas
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’s past 15 years old
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.
The paperwork behind a new heat pump in Dunn Loring.
How to pick the best heat pump installer in Dunn Loring.
Questions to ask anybody who quotes you, us included.
How cold can it get before the strips take over?
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.
Did they size it, or copy the old label?
Copying the old nameplate repeats whatever guess was made when the house was built. The wrong size runs worse in both seasons.
Is the air handler in the price?
A heat pump system is the outdoor unit plus the air handler inside. Ask whether the quote covers both, matched, in writing.
Who sets up the backup heat?
Set wrong, the electric strips run on mild days. Ask who programs the thermostat and at what outdoor temperature the strips may come on.
What our customers say.
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!
5.0 stars across 884 Google reviews. Read them on our reviews page.
Heat pump replacement questions from Dunn Loring.
Is the steam coming off my heat pump in winter a problem?
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.
Where should the new outdoor unit sit when it snows?
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.
How much does heat pump replacement cost in Dunn Loring?
$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.
Should I get a heat pump, or a furnace and air conditioner?
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.
More from SwiftPro in Dunn Loring.
More from SwiftPro in Dunn Loring
See the range first, then your number.
Call, or book online and pick a window. 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 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 884 Google reviews. SwiftPro maintains a dedicated HVAC team and a dedicated plumbing team.
SwiftPro Heating, Cooling & Plumbing, 4230 Lafayette Center Dr, Suite N, Chantilly, VA 20151, (703) 997-9757. Book online, read our reviews, or see every town we serve.