Lukewarm air on a cold morning
If your hydro-air closet blows lukewarm on a cold morning while the building feels warm, the boiler is usually fine. A seized circulator or a clogged coil in your own handler is the likelier culprit.
Fairfax, Virginia
Condo HVAC in Fairfax.
For condo HVAC in Fairfax, 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 Fairfax under Virginia Class A contractor license 2705192276, and SwiftPro is rated 5.0 stars across 1,130 reviews. We cover condo HVAC replacement in Fairfax: First Co closet units, hydro-air off a building boiler and fan coils across 22030, 22033 and Oakton. 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 Fairfax.
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 Fairfax
Three different systems sit inside Fairfax’s condo buildings.
Fairfax is the one town where we regularly meet all three of the odd ones in the same week. In 22030, the older buildings around the city center mostly have First Co closet units. Out toward Fair Lakes and Fair Oaks (22033), and up into Oakton (22124), we also find hydro-air, where the building boiler heats a water coil in your air handler, and fan coils fed from the same pipes.
Hydro-air is the one owners rarely know they have. There’s no furnace in the closet, just an air handler with hot water piping running into it from a boiler the building keeps. Replacing the handler is your call. Draining the piping to do it is not, because the neighbors on that riser lose heat while the valves are closed, so the management office books the day with us.
The First Co jobs here are mostly tight. About two thirds of Fairfax city’s owner homes went up before 1980, and the closets from that era were framed around a cabinet that no longer exists. We measure the door, the shelf and the existing line set first, then order the one unit that goes in without opening drywall.
Fan coils are the easy ones. Same closet, same water, a new coil and blower, and usually one visit. Which of the three is yours shows on the nameplate, and a photo of it is enough for us to tell you before anyone drives out.
Neighborhood by neighborhood
What condo systems look like across Fairfax.
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 |
|---|---|---|---|---|
| Fair Oaks | 1995 | condo and apartment buildings, about 5 in 10 | gas, about 6 in 10 | A First Co or MagicPak in a closet. |
| City of Fairfax | 1966 | single-family houses, about 5 in 10 | gas, about 7 in 10 | Through-the-wall units or a water loop. |
| Fairfax Station | 1982 | single-family houses, about 9 in 10 | gas, about 5 in 10 | A First Co or MagicPak in a closet. |
| Kings Park West | 1976 | single-family houses, about 7 in 10 | gas, about 5 in 10 | Through-the-wall units or a water loop. |
| Merrifield | 1990 | condo and apartment buildings, about 6 in 10 | gas, about 6 in 10 | A First Co or MagicPak in a closet. |
| Fair Lakes | 1998 | townhouses, about 3 in 10 | gas, about 7 in 10 | A First Co or MagicPak in a closet. |
| Long Branch | 1968 | single-family houses, about 9 in 10 | gas, about 7 in 10 | Through-the-wall units or a water loop. |
| Mantua | 1968 | single-family houses, about 7 in 10 | gas, about 7 in 10 | Through-the-wall units or a water loop. |
By the numbers
Fairfax homes, by the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
The City of Fairfax
- Median home built1966 Census
- Built before 1980about 7 in 10 Census
- Built since 2000about 2 in 10 Census
- Most homes aresingle-family houses, about 5 in 10 Census
- Heated withgas, about 7 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.
- Most homes here were built before 1980, the era of through-the-wall units and building water loops in condo buildings.
The Fairfax County side
Most of the Fairfax Station Census place, in the table, has Fairfax mail, so it counts here.
- Built before 1980about 3 in 10 Census
- Built since 2000about 3 in 10 Census
- Most homes aresingle-family houses, about 4 in 10 Census
- Heated withgas, about 6 in 10 Census
- Rentedabout 4 in 10 Census
- A big share of homes here are in apartment-style buildings, where the system is usually a single closet unit or a wall-sleeve unit sized to that space.
- 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 Fairfax is ready to go.
The building is older than the unit’s design
Older buildings often still run through-the-wall units or a water loop shared with the building. Parts for some of those are getting hard to find, which is when replacing beats chasing them.
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.
Need condo HVAC replacement in Fairfax?
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Choosing who replaces it
How to pick who replaces a condo system in Fairfax.
Questions to ask anybody who quotes your condo system, us included.
Have you worked with a building boiler before?
Hydro-air and fan coil swaps tie into piping the association maintains. Ask whoever quotes you whether they’ve coordinated a shutoff with a Fairfax management office, not only swapped a furnace.
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.
I would gladly recommend them to anyone in the greater Fairfax/Alexandria area without reservation.
Swiftpro came out the same day I called when my AC was out and had it fixed in less than an hour after arriving.
Elvis Diaz did an excellent job cleaning our condo’s HVAC system. He was very knowledgeable about maintaining the unit and the price was very reasonable.
- 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
Where we work
Condo HVAC replacement in every Northern Virginia town we serve
Next door to Fairfax: Vienna, Reston, Falls Church, Herndon and McLean.
Fairfax County
Arlington County
Loudoun County
Prince William County
Fauquier County
Stafford County
Every town on one page
Questions
Condo HVAC questions from Fairfax.
How do I know if my Fairfax condo is hydro-air?
Look for copper or black pipe running into the air handler and no gas line, flue or outdoor condenser. If you see that, the heat comes from the building boiler.
Can I replace just the fan coil in my Fairfax condo?
Usually, yes. The fan coil is the part that serves only your home. Check the unit’s $4,500 to $5,100 price range first, then your declaration for who owns what.
How much is a condo HVAC replacement in Fairfax?
$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 Fairfax 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.