The January bill gives it away
A Herndon condo heat pump losing its edge shows up as a higher electric bill in winter, long before cooling fails the next summer. Strip heat running more often is the usual sign.
Herndon, Virginia
Condo HVAC in Herndon.
For condo HVAC in Herndon, 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 Herndon under Virginia Class A contractor license 2705192276, and SwiftPro is rated 5.0 stars across 1,130 reviews. Condo HVAC replacement in Herndon, where 1980s and 90s buildings mean electric heat pumps and strip heat, not boilers. 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 Herndon.
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 Herndon
Herndon condos run on electric, and your bill shows it first.
Herndon’s condo stock is younger than its neighbors’. More than 4 in 10 owner homes here date from 1980 to 1999, and about 6 in 10 heat with electricity. So you’ll mostly find electric heat pumps and strip heat in the closet, not boiler piping or a shared loop.
Near downtown, along Elden Street and Herndon Parkway, the buildings are small and the units are mostly through-the-wall. That’s a friendly job: the old cabinet pulls out of its sleeve and the new one slides in. Most of the trouble is the louver outside and a drain that’s been dripping on the neighbor below.
The larger complexes out on the county side lean on an air handler in the wall with a rooftop condenser. After thirty years the curb, the platform and the lines all deserve a look before we put a number on it. Herndon owners often ask whether to stay with electric or move to something else; in a condo the straight answer is usually to stay, since gas lines to the unit rarely exist.
Electric heat makes your own bills a diagnostic. If January’s bill jumps while the unit still runs, the backup strip is probably doing work the heat pump should be doing. That tells you more, sooner, than waiting for a breakdown in July. Strip heat that runs a lot is the sign to have the unit looked at.
Neighborhood by neighborhood
What condo systems look like across Herndon.
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 |
|---|---|---|---|---|
| Franklin Farm | 1985 | single-family houses, about 9 in 10 | electricity, about 5 in 10 | A First Co or MagicPak in a closet. |
| Herndon | 1981 | single-family houses, about 4 in 10 | electricity, about 6 in 10 | A First Co or MagicPak in a closet. |
| Dranesville | 1984 | single-family houses, nearly all | electricity, about 6 in 10 | A First Co or MagicPak in a closet. |
| McNair | 2003 | condo and apartment buildings, about 6 in 10 | gas, about 7 in 10 | A closet air handler, condenser outside. |
| Floris | 1990 | single-family houses, about 8 in 10 | gas, about 6 in 10 | A First Co or MagicPak in a closet. |
| Hutchison | 1979 | townhouses, about 5 in 10 | electricity, about 7 in 10 | Through-the-wall units or a water loop. |
| Sully Square | 2015 | condo and apartment buildings, about 6 in 10 | gas, about 6 in 10 | A closet air handler, condenser outside. |
By the numbers
Herndon homes, by the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
The Town of Herndon
Inside the town limits. Floris, Franklin Farm, McNair and Dranesville, on the Fairfax County side, are counted by the Census as places of their own.
- Median home built1981 Census
- Built before 1980about 4 in 10 Census
- Built since 2000about 2 in 10 Census
- Most homes aresingle-family houses, about 4 in 10 Census
- Heated withelectricity, about 6 in 10 Census
- Rentedabout 4 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 Herndon 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 Herndon?
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Choosing who replaces it
How to pick who replaces a condo system in Herndon.
Questions to ask anybody who quotes your condo system, us included.
What happens to the old drain line?
A through-the-wall cabinet drains out the back. Ask whether the quote includes a fresh pan and float switch, so the unit below yours stays dry.
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.
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
Questions
Condo HVAC questions from Herndon.
Is my Herndon unit a heat pump or an electric strip?
A nameplate that says heat pump, or a reversing valve and no gas line, means heat pump. A through-the-wall AC with a heater strip is the other kind, priced under $6,100 to $8,000.
Can my Herndon condo go to a ductless system?
Sometimes, but it changes the outside wall or roof, so the association signs off first. Our heat pump installation page covers what that involves.
How much is a condo HVAC replacement in Herndon?
$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 Herndon 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.