Open 24/7 for emergencies
Heat pump replacement in Chantilly runs $8,499 to $21,650 installed. In 20151 more than 4 in 10 homeowners 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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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 Chantilly
The Census counts a heat pump as electric heat, and the two halves of Chantilly differ sharply on it. In 20151, more than 4 in 10 homeowners heat with electricity, nearly as many as heat with gas. Across the county line in South Riding it’s about 1 in 7, and in Greenbriar about a quarter.
Most 20151 houses date from the 1980s and 90s, and in the heat pump ones an air handler sits in a closet or the basement where a gas house would have a furnace, with electric strips inside it for the coldest mornings. A like-for-like replacement there is the outdoor unit and the air handler together, matched; a new outdoor unit hung on a twenty-year-old air handler rarely runs the way it was rated to.
South Riding is gas country, more than 8 in 10 homeowners, so the heat pump question there is usually dual fuel, and the rebate rules matter. Washington Gas’s dual fuel rebate is written for a heat pump that replaces a central air conditioner; swapping an existing heat pump doesn’t qualify. It’s also for Washington Gas customers only, and Fairfax County says portions of Chantilly are on Columbia Gas of Virginia instead. Our dual fuel guide has the current amounts.
The HVAC estimator prices a heat pump system when you choose heating and cooling with electric heat, and gives your house its own number inside $8,499 to $21,650. In South Riding the permit comes from Loudoun County, which counts replacing heating and cooling equipment as mechanical work; the Fairfax County rules for 20151 are below.
Neighborhood by neighborhood
Census figures for the owner-occupied homes in each place, and what that usually means for a heat pump.
| Place | Median home built | Most homes are | Heated with | What a heat pump job usually looks like |
|---|---|---|---|---|
| South Riding | 2006 | single-family houses, about 5 in 10 | gas, about 8 in 10 | Gas houses from the 2000s, where an aging air conditioner can give way to a heat pump. |
| Chantilly | 1987 | single-family houses, about 6 in 10 | gas, about 5 in 10 | 1980s and 90s gas houses, most on a second air conditioner, the part a heat pump would replace. |
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.
When it’s time
In a Chantilly winter a heat pump frosts up and clears itself every so often; that’s the defrost cycle doing its job. A coil that stays caked in ice for hours means it isn’t, and on an older unit that’s where repair or replace gets decided. The $99 diagnostic visit tells you which.
When the heat pump can’t keep up, the electric strips take over, and they cost far more to run. Aux heat on for hours is the sign.
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.
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.
Every defrost cycle drops meltwater under the outdoor unit. On a pad at ground level that water can freeze into a block that climbs into the coil. Ask whether the new unit goes on risers or a stand.
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.
Arrived within an hour on a Sunday morning and provided great service.
Called SwiftPro around 5 am and their electronic system scheduled an appointment for us same day.
Excellent work by Tyler and Team. Right from pricing to performing professional installation of new Heat Pump.
Where we work
Next door to Chantilly: Centreville, Catharpin, Herndon, Aldie and Oakton.
Questions
Check the thermostat for an emergency or auxiliary heat setting. Then, on a cold day, stand by the outdoor unit while the heat is on: if its fan is spinning, it’s a heat pump.
Rarely all the way. With gas already in the house, the usual move is a heat pump in the air conditioner’s place and the furnace kept for the coldest nights. The time to decide is when the outdoor unit fails, not the furnace, because that’s the half a heat pump replaces.
$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 Chantilly 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.