Open 24/7 for emergencies
Heat pump replacement in Lorton runs $8,499 to $21,650 installed. About a third of Lorton owners heat with electricity; on Mason Neck, close to two in three.
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 Lorton
The Census files a heat pump under electric heat, and across 22079 about a third of owners heat that way. On Mason Neck it’s close to two in three. In Newington, which straddles Lorton’s north edge, a little over half. In the Lorton Census place three in ten, and in Laurel Hill, the gas end of town, about one in seven.
Mason Neck is all single-family houses, the typical owner’s from 1973, along Gunston Road, River Drive and High Point Road. Natural gas is uncommon there, so most houses run on electric heat, usually a heat pump with backup strips in the air handler. A house that age is likely on its third outdoor unit, still moving air through ductwork laid out half a century ago, and a heat pump wants more air at a milder temperature than many of those ducts were sized for. We check the trunk and the returns before picking a size.
About a third of Lorton’s homes are townhouses. In the ones on electric heat the air handler usually lives in a closet or the attic and the outdoor unit on a pad behind the row, a few steps from the neighbor’s. The new one comes in the way the old one went out, and many townhouse associations want to see the outdoor unit before it’s set.
In Laurel Hill and most of the Lorton Census place the heat is a gas furnace, and a heat pump usually comes up the summer the builder’s air conditioner quits. It can take that spot and carry the heating through fall and spring, leaving hard freezes to the furnace. Our dual fuel guide explains the split.
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 |
|---|---|---|---|---|
| Lorton | 2001 | single-family houses, about 4 in 10 | gas, about 7 in 10 | Gas houses from the 2000s, where an aging air conditioner can give way to a heat pump. |
| Newington | 1981 | townhouses, about 6 in 10 | electricity, about 6 in 10 | Electric heat leads, which here means heat pumps: often a like-for-like swap. |
| Laurel Hill | 2002 | single-family houses, about 4 in 10 | gas, about 8 in 10 | Gas houses from the 2000s, where an aging air conditioner can give way to a heat pump. |
| Mason Neck | 1973 | single-family houses, nearly all | electricity, about 6 in 10 | Electric heat leads, which here means heat pumps: often a like-for-like swap. |
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 22079 as a whole: every Lorton address. Most of Newington, in the table, has Springfield mail.
When it’s time
On a Mason Neck heat pump, aux heat showing on a mild afternoon means the strips are doing the outdoor unit’s work. Sometimes it’s a setting; on an older unit it’s often a tired compressor. The $99 diagnostic visit finds which, with the repair price next to the replacement range.
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.
A heat pump from a 2000s house that’s still original has run every summer and winter since. Once repairs start, price the replacement before the next one.
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.
A Mason Neck house might back its heat pump with electric strips, a propane furnace or natural gas, and each changes the indoor half of the job. Ask that the written quote names the backup it assumes and how the thermostat hands off to it.
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.
Hard working crew that removed old system and installed new system in a professional manner.
Where we work
Next door to Lorton: Fort Belvoir, Springfield, Woodbridge, Fairfax Station and Burke.
Questions
Sized for the house, yes, with strips or a propane furnace behind it for the coldest mornings. The house sets the size more than the weather: windows, insulation and 1970s ducts. That’s why we measure instead of reading the size off the old unit.
Usually, yes. The heat pump takes the air conditioner’s place outside, the furnace stays, and the thermostat decides when to hand over to propane. On Mason Neck, where about one owner in ten burns propane, the furnace then runs in the coldest weather rather than every chilly evening.
$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 Lorton 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.