A patched sleeve that leaks air
In an older Sterling building, a wall unit that whistles, drips on the siding or shows daylight at the edges is often a sleeve problem as much as a unit problem. A new unit in a bad sleeve will leak the same way.
Sterling, Virginia
Condo HVAC in Sterling.
For condo HVAC in Sterling, a whole condo system replaced is $7,900 to $14,000, from our own condo jobs. Call SwiftPro, rated 5.0 stars across 1,130 reviews, at (703) 997-9757, 24 hours a day, 7 days a week.
$132/mo60mo @ 0% APR
Price range
$7,900-$14,000
8yrs @ 7.99%
$112/mo
15yrs @ 9.99%
$85/mo
Monthly figures on the starting price, the whole price financed, on approved credit. The lender sets the final terms. How financing works
We install in Sterling under Virginia Class A contractor license 2705192276, and SwiftPro is rated 5.0 stars across 1,130 reviews. We cover condo HVAC replacement in Sterling, from 1970s condos in Sterling Park to First Co closet units and through-the-wall systems near Dulles. By type, a First Co runs $7,900 to $12,500, a MagicPak $8,500 to $13,400 and a water source heat pump $9,100 to $10,300. Just the fan coil or air handler is $4,500 to $5,100.
- Priced by the system you have
- Our own licensed HVAC techs
- Sized to fit the closet you’ve got
5.0 stars across 1,130 reviews
Two of our HVAC technicians in a mechanical room, the kind of tight space most condo systems live in.
Get your price in writing
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Rather talk now? (703) 997-9757
Licensed and insuredVirginia Class A contractor #2705192276
24/7 emergency serviceWe answer day or night, 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
What condo HVAC replacement costs in Sterling.
From our own condo jobs, the same book as our condo HVAC page: the equipment, the crew, hauling the old unit out and starting the new one up. Every row is a real range we’ve sold, never a starting price.
Fan coil or air handler only
$4,500 to $5,100
or $75/mo at 0% APR for 60 months
PTAC replacement (per unit)
$2,600 to $4,400
or $43/mo at 0% APR for 60 months
Through-the-wall AC and coil only
$6,100 to $8,000
or $102/mo at 0% APR for 60 months
First Co system replacement
$7,900 to $12,500
or $132/mo at 0% APR for 60 months
MagicPak replacement
$8,500 to $13,400
or $142/mo at 0% APR for 60 months
Water source heat pump replacement
$9,100 to $10,300
or $152/mo at 0% APR for 60 months
Hydro-air system (AC plus water-coil air handler)
$11,000 to $14,000
or $183/mo at 0% APR for 60 months
System plus the water heater in the same closet
$12,000 to $16,000
or $200/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
Prices checked .
Where you land in a range is mostly access: a closet off the hall on the first floor is the easy end, a top floor with no elevator or a condenser that has to go up by crane is the other.
Most condo systems are built to fit one closet or one wall sleeve, so the new unit has to match that footprint. We measure before we price, so nothing gets ordered that won’t fit.
What’s different in Sterling
Sterling has two ages of condo, and they don’t need the same job.
Sterling is split down the middle. The Census puts the median owner home here at 1979, and about 43 percent of Sterling CDP homes were built before 1980. Those are the condos in the Sterling Park area, off Sterling Boulevard and Davis Drive in 20164 and 20165, and their original systems are long gone. Many are on their second or third replacement, with the closet and wall opening shaped by the first.
What we find in 20164 and 20165 is the same trio, in older shells: First Co closet units, through-the-wall units, and First Co Aquatherm. A through-the-wall unit in a 1970s garden building usually sits in a sleeve that’s been patched, shimmed and caulked over the years. Getting a new unit to seal in that sleeve is half the job, so we look at the wall before we quote.
Near Dulles Town Center the picture flips. More than half the homes in that pocket are in apartment buildings, and nearly two thirds were built since 2000. Those buildings are newer and the closets are tidier, but they’re larger, so there are more units in each stack, and the association usually wants one coordinated schedule for the whole building.
Sterling has a lot of rental stock next to owner-occupied condos, so some buildings have a mix of owners and investors. If you rent the unit out, your tenant needs notice and a time window, and the crew needs the closet cleared. We schedule around whichever the building requires and ask who holds the key.
Neighborhood by neighborhood
What condo systems look like across Sterling.
Census figures for the owner-occupied homes in each place, and the kind of condo system we usually find in buildings that age.
| Place | Median home built | Most homes are | Heated with | What condo system you’ll usually find |
|---|---|---|---|---|
| Sterling | 1979 | single-family houses, about 5 in 10 | electricity, about 5 in 10 | Through-the-wall units or a water loop. |
| Lowes Island | 1996 | single-family houses, about 6 in 10 | gas, about 7 in 10 | A First Co or MagicPak in a closet. |
| Cascades | 1996 | townhouses, about 4 in 10 | gas, about 8 in 10 | A First Co or MagicPak in a closet. |
| Sugarland Run | 1983 | single-family houses, about 6 in 10 | gas, about 5 in 10 | A First Co or MagicPak in a closet. |
| Dulles Town Center | 1998 | condo and apartment buildings, about 5 in 10 | gas, about 9 in 10 | A First Co or MagicPak in a closet. |
| Arcola | 2017 | townhouses, about 5 in 10 | gas, about 8 in 10 | A closet air handler, condenser outside. |
| Oak Grove | 2005 | townhouses, about 8 in 10 | gas, about 9 in 10 | A closet air handler, condenser outside. |
By the numbers
Sterling homes, by the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
Sterling
- Built before 1980about 2 in 10 Census
- Built since 2000about 2 in 10 Census
- Most homes aresingle-family houses, about 4 in 10 Census
- Heated withgas, about 6 in 10 Census
- Rentedabout 3 in 10 Census
- Condos are a smaller share of homes here, mostly garden-style buildings where each unit has its own closet system and its own condenser.
- Many homes here are from the 80s and 90s, when packaged closet units like the First Co and MagicPak went into a lot of condo buildings.
The signs
When a condo system in Sterling is ready to go.
It runs all day and the rooms stay warm
A condo system that never shuts off in July, or a bedroom that stays a few degrees off the thermostat, is usually a compressor or coil near the end. Repairs at that age tend to come back.
Water on the closet floor
A drain pan that overflows in a closet over somebody else’s ceiling is a bigger problem than it is in a house. On an older unit, a rusted pan or a cracked coil often means the whole unit is due.
Need condo HVAC replacement in Sterling?
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Choosing who replaces it
How to pick who replaces a condo system in Sterling.
Questions to ask anybody who quotes your condo system, us included.
Will they look at the sleeve before quoting?
A company that quotes a through-the-wall swap from the nameplate alone is guessing about the wall. Ask them to measure the opening and check the sleeve’s condition.
Did they ask what system you have before quoting?
A First Co, a MagicPak and a water source heat pump are different jobs at different prices. Anyone who quotes without the model on the label is guessing.
Did they ask about the association?
In Virginia, unless your condo documents say otherwise, the equipment that serves only your unit is yours to replace, but changing the outside of the building needs the association. Ask whether they’ll work with the management office on roof access or a wall sleeve.
Two of our crew going over a work order before the day's calls.
From our Google reviews
What our customers say.
5.0 stars across 1,130 reviews. Read them on our reviews page.
Good first visit to do a diagnostic, helpful tips were given by the tech to fix the smell coming from drain pipes in my condo
- 5.0stars across 1,130 reviewsHow we count them
- ABBB Accredited, A ratingCheck it on bbb.org
- 2026Voted a Nextdoor Neighborhood Faves winner two years running: 2026 in 30 Northern Virginia neighborhoods, 2025 in Emerald Chase (Herndon) and Hunters Run (Chantilly)See it on Nextdoor
- #1BusinessRate Best of 2026: the top-ranked heating contractor in Fairfax, VirginiaSee our BusinessRate score
- Class AVirginia contractor, license #2705192276Look it up with DPOR
Questions
Condo HVAC questions from Sterling.
Is my Sterling condo’s system worth repairing?
In a building from the 1970s or 80s, if the unit is past 15 years and the repair is near half a new one, we’d replace. Younger units near Dulles can often be repaired once or twice first.
Does the building have to approve my replacement?
If it changes the outside, the louver or the shared piping, yes. A closet swap inside your unit is usually yours to do, but a quick call to the management office avoids surprises.
How much is a condo HVAC replacement in Sterling?
$7,900 to $14,000 for a whole system, from our own condo jobs. A First Co runs $7,900 to $12,500, a MagicPak $8,500 to $13,400, a water source heat pump $9,100 to $10,300. Just the fan coil or air handler is $4,500 to $5,100.
Is the condo HVAC mine or the association’s?
Under Virginia law, unless your condo documents say otherwise, the parts that serve only your unit are yours, even a condenser on the roof or your patio. Parts serving more than one unit belong to the association. Check your documents; we’ll work with whoever owns it.
Ready when you are
Find out what your condo system needs.
Call, or send the form at the top. We look at the unit, measure the closet, and you get the price in writing before anything is ordered.
SwiftPro Heating, Cooling & Plumbing
4230 Lafayette Center Dr N, Chantilly, VA 20151
44679 Endicott Dr, Suite 211, Ashburn, VA 20147
SwiftPro Plumber & Water Heaters
4200 Lafayette Center Dr, Suite N, Chantilly, VA 20151
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 Sterling and the rest of Northern Virginia. Virginia contractor license #2705192276. 5.0 stars across 1,130 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.