The thermostat on 68 that feels like 62
Dry air feels cooler than humid air at the same reading. If your family keeps raising the thermostat in winter and still feels chilly, the air may be too dry rather than too cold.
Dunn Loring, Virginia
Whole-home humidifiers in Dunn Loring.
For whole-home humidifier repair in Dunn Loring, 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 Dunn Loring, SwiftPro is rated 5.0 stars across 1,130 reviews and works under Virginia Class A contractor license 2705192276. Whole-home humidifiers in Dunn Loring, 22027, a small ZIP of 1990s houses whose original furnaces are old enough that timing the humidifier matters. 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
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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 Dunn Loring.
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 Dunn Loring
Dunn Loring’s 1990s furnaces are the ones due for replacement.
Dunn Loring is a small ZIP with about 600 owner homes, nearly all detached, and the typical one was built in 1991. That puts the average furnace at over thirty years old. A humidifier is mounted on that furnace’s ductwork, so the first question is whether the furnace has years left.
If it does, a bypass model on the existing duct is simple. If it is near the end, it’s smarter to wait and put the humidifier on the new one, since the duct connection gets cut up anyway. Doing both in one visit saves a second trip and the second cut in the sheet metal. We tell you which makes sense after we see the furnace.
About two thirds of owners here heat with gas and 28 percent use electric, so most get a bypass Aprilaire and the heat pump houses get the fan-powered one. Half the houses are from the 1980s and 90s, tighter than a 1960s house but not tight like a new rebuild, so a mid-sized unit holds them.
Many Dunn Loring addresses share a mailing name with Vienna, and the houses in the two places look alike. If you found the Vienna advice, much of it applies. The difference is that these houses were built to a later code, with fewer leaks. A look at the humidifier page shows what a visit covers.
By the numbers
Dunn Loring houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
Dunn Loring
ZIP 22027 as a whole: every Dunn Loring address. The Dunn Loring Census place is bigger: about three in four of its homes have Vienna mail.
- Median home built1991 Census
- Built before 1980about 3 in 10 Census
- Built since 2000about 2 in 10 Census
- Most homes aresingle-family houses, about 9 in 10 Census
- Heated withgas, about 7 in 10 Census
- Rentedhardly any 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.
The signs
When a Dunn Loring 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 Dunn Loring?
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Choosing who does it
How to pick who installs a humidifier in Dunn Loring.
Questions to ask anybody who quotes you one, us included.
Did they check the furnace’s age first?
If the furnace is thirty years old, installing a humidifier on it now and a new furnace in two years means paying for the work twice.
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.
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 Dunn Loring: Vienna, Falls Church, McLean, Annandale and Oakton.
Fairfax County
Arlington County
Loudoun County
Prince William County
Fauquier County
Stafford County
Every town on one page
Questions
Humidifier questions from Dunn Loring.
Should I replace the furnace before adding a humidifier?
Only if it is near the end. A furnace that still runs well can carry a humidifier, and we’ll tell you what we see.
Does a humidifier work on a gas furnace this old?
Yes. The bypass model needs warm supply air and a spot on the duct. Age doesn’t matter if the furnace is sound.
How much is a whole-home humidifier in Dunn Loring?
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 Dunn Loring 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.