Doorknobs and stair rails all winter
Static shocks are the quick tell in Chantilly’s heat pump houses, which run the blower long and slow. If you feel a zap on the stair rail before breakfast, the house is near 20 percent.
Chantilly, Virginia
Whole-home humidifiers in Chantilly.
For whole-home humidifier repair in Chantilly, if the humidifier you have stopped working, finding out why is the $99 diagnostic visit. Call SwiftPro, rated 5.0 stars across 1,130 reviews, at (703) 997-9757, 24 hours a day, 7 days a week.
For whole-home humidifiers in Chantilly, SwiftPro is rated 5.0 stars across 1,130 reviews and works under Virginia Class A contractor license 2705192276. Whole-home humidifiers in Chantilly, where gas furnaces and heat pumps split the houses almost evenly and each one gets a different humidifier. A new one is priced at your house, in writing, once we’ve seen the furnace, the ductwork and the nearest water line. Through October 31, code HUMID250 takes $250 off a humidifier plumbed into the ductwork.
- Priced in writing at your house
- Our own HVAC technicians
- Set and tested before we leave
5.0 stars across 1,130 reviews
A whole-home humidifier mounted on the supply duct above the furnace, with its own water line and drain.
Get your price in writing
Send this and the office calls or texts you back to set a time.
We’ll call or text this number about your request. By sending it you agree to our terms and privacy policy.
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 a whole-home humidifier costs in Chantilly.
We price it in writing at your house, the same way our whole-home humidifier page explains. More on the numbers in our humidifier cost guide.
Diagnostic visit, when the humidifier you have stopped working
$99
Whole-home humidifier installed on your furnace or air handler
Priced at your house, in writing, before any work
Coupon HUMID250, through October 31
$250 off the install
Prices checked .
What moves the price is the model and the path to it: a bypass model on an open basement furnace with a water line close by is the simple end, a fan-powered model in a tight closet with a long run for water and a drain is the other.
If the house already has a humidifier that stopped, we look at it first. Often it’s a crusted water panel, a closed saddle valve or a control that lost its wiring, and that’s a repair, not a new unit.
What’s different in Chantilly
Chantilly splits down the middle, gas furnace on one side, heat pump on the other.
Of Chantilly’s owner homes, 53 percent heat with gas and 44 percent with electricity, which is about as close to a coin flip as any town we work in. Before we pick anything, we find out which half your house is in. Walk out and look at the equipment: a condenser out back and an air handler inside means a heat pump, and a furnace with a flue pipe means gas.
Gas houses get a bypass Aprilaire, a 600-series that uses the furnace’s warm supply air to do the evaporating. Heat pump houses get a fan-powered 700-series, because the air is cooler and the unit has to push its own. Same dry January, two different machines, and a quote that doesn’t say which is the one to doubt.
Sixty percent of Chantilly owner homes were built between 1980 and 1999, and six in ten are detached. A lot of those colonials have the furnace in a full basement with open ductwork around it, which is the easy install. A room over a garage that never gets warm is still a duct issue and not a humidity one, so don’t blame the humidifier for it.
Look at the ductwork over your furnace before anything else. A lot of homes here have a builder’s humidifier already sitting there with a dry pad. If yours is one, the $99 visit is the cheap way to find out; our humidifier page covers what a new one involves.
Neighborhood by neighborhood
What fits on the system across Chantilly.
Census figures for the owner-occupied homes in each place, and the humidifier that usually suits houses like them.
| Place | Median home built | Most homes are | Heated with | What usually fits |
|---|---|---|---|---|
| South Riding | 2006 | single-family houses, about 5 in 10 | gas, about 8 in 10 | A bypass model on the gas furnace’s ductwork. |
| Chantilly | 1987 | single-family houses, about 6 in 10 | gas, about 5 in 10 | A bypass model on the gas furnace’s ductwork. |
By the numbers
Chantilly houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
20151, the Fairfax County side
- Median home built1987 Census
- Built before 1980about 2 in 10 Census
- Built since 2000about 2 in 10 Census
- Most homes aresingle-family houses, about 6 in 10 Census
- Heated withgas, about 5 in 10 Census
- Rentedabout 2 in 10 Census
- Houses from the 80s and 90s often came with a builder’s humidifier on the furnace, and many of those are still on the duct, switched off.
- Most homes here are detached houses with the furnace in a basement or utility room, which usually leaves room for a bypass model on the ductwork.
20152, the South Riding side
- Median home built2006 Census
- Built before 1980hardly any Census
- Built since 2000about 8 in 10 Census
- Most homes aresingle-family houses, about 5 in 10 Census
- Heated withgas, about 8 in 10 Census
- Rentedabout 2 in 10 Census
- Newer houses are built tighter, so a smaller humidifier holds the number and the outdoor sensor matters more, to keep the windows dry.
- Many homes here are townhouses or condos with the system in a closet. A fan-powered model fits where there’s no room for a bypass duct, and in a condo the association may need to approve the water line.
The signs
When a Chantilly house is too dry in winter.
Static every time you touch a doorknob
A zap off every light switch in January means the air in the house is well under 30 percent. Outdoor winter air holds little water, and heating it dries it further.
Floors and trim open up gaps
Wood gives up water in dry air. Gaps between floorboards, a cabinet door that sticks, or a piano that won’t hold its tuning through winter all point the same way.
Need whole-home humidifiers in Chantilly?
A person answers day and night. See this month’s deals before you call.
Choosing who does it
How to pick who installs a humidifier in Chantilly.
Questions to ask anybody who quotes you one, us included.
Did they ask what the house heats with?
A good quote in Chantilly starts with gas furnace or heat pump, because the two take different humidifiers. If they priced one model for any house, ask why.
Did they ask where the water and the drain come from?
A humidifier needs a water line and, for most models, a drain. Whoever looks for both before quoting is the one who won’t surprise you on install day.
Did they say which kind, and why?
A bypass model, a fan-powered model and a steam model each suit different systems. Ask why theirs fits your furnace or heat pump, not just what it costs.
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.
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.
Rich came out to give us an estimate and setup installation of a whole home humidifier. He was friendly, on-time, and very knowledgeable and made sure we were getting what would work best for our home. Highly recommend!
- 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
Whole-home humidifiers in every Northern Virginia town we serve
Next door to Chantilly: Centreville, Catharpin, Herndon, Aldie and Oakton.
Fairfax County
Arlington County
Loudoun County
Prince William County
Fauquier County
Stafford County
Every town on one page
Questions
Humidifier questions from Chantilly.
Is my Chantilly house too tight for one?
Probably not. Houses from the 80s and 90s let in plenty of dry outside air, and a bypass or fan-powered model sized for them holds a steady number.
Does the humidifier run all summer?
No. It’s off from spring to fall, and the water line gets shut at the valve. We’ll show you where it is and when to open it again.
How much is a whole-home humidifier in Chantilly?
It’s priced at your house, in writing, because the model and the work depend on your system, your ducts and where the water line is. If you have one that stopped working, the diagnostic visit is $99.
What humidity should the house be at in winter?
The EPA says keep indoor humidity between 30 and 50 percent. On the coldest nights we run it nearer the low end so windows don’t sweat, and an Aprilaire with an outdoor sensor turns itself down for you.
Ready when you are
Find out what your house needs.
Call, or send the form at the top. We look at the furnace, the ducts and the water line, and you get the price in writing before any work starts.
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 Chantilly 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.