For most houses, have the air ducts looked at every 3 to 5 years and cleaned only when the look shows buildup; the dryer vent is different, and needs cleaning every year. Return Air Duct Cleaning is $298 and Whole Home Air Duct Cleaning is $598 right now, regularly $798, for one system in a home up to 2,000 square feet, and dryer vent cleaning is $199, normally $298, with a year of Comfort+ membership included.
That 3 to 5 years is our rule of thumb, not a law. The EPA doesn’t set an interval for air ducts at all; its advice is to clean them “only as needed.” Even the duct cleaners’ trade group, the National Air Duct Cleaners Association, says how often “depends on several factors, not the least of which is the preference of the homeowner.” What moves the number is what goes on in your house.
| What | How often |
|---|---|
| Air ducts, most houses | Look every 3 to 5 years, clean when the look shows buildup |
| Air ducts with shedding pets, smokers, or after a renovation | Look closer to every 3 years, or right after the dusty work |
| Air ducts in a house you just bought | Look before you move the furniture in |
| Dryer vent | Every year, sooner if clothes take longer to dry |
| Furnace filter | Every 1 to 3 months |
| Heating and cooling tune-up | Twice a year, before each season |
When to clean air ducts sooner than that
Look sooner, and expect the ducts to need it more often, if any of these are true:
- Pets that shed. Dog and cat hair goes where the air goes, and the low wall returns near the floor fill first.
- A renovation. Sanding drywall or refinishing floors with the system running sends fine dust through every return. Next time, do what the EPA says: seal off the registers and don’t run the system “until after cleaning up the dust.”
- You just moved in. You don’t know the last owner’s habits, the home inspection didn’t take the ducts apart, and the rooms are never emptier than the week before you unpack. Our first-month list for new homeowners has the rest.
- Smokers in the house, or water damage to the home or the system. Both are on NADCA’s list of reasons to clean more often.
- Something got into the ducts. Mice or insects are a reason on their own in the EPA’s guide. Find and close the way in first, or you’ll be paying twice.
When air ducts can go longer between cleanings
A house with no pets, nobody smoking, no recent work and filters changed on time can go well past 5 years. If you take a return cover off and see bare metal with a light film, there’s nothing to clean. The EPA says “a light amount of household dust in your air ducts is normal.”
A dusty return grille doesn’t count either. Returns pull air in all day, and the EPA says plainly that “It is normal for the return registers to get dusty.” Vacuum the face of the grille once a month and leave the ducts alone.
What to do between air duct cleanings
- Change the filter every 1 to 3 months, and use the highest efficiency filter your system’s manufacturer recommends. It’s the EPA’s first advice for keeping dirt out of ducts, and it’s the cheapest thing on this list. Our furnace filter guide covers which one.
- Keep the returns clear. A couch pushed against a return starves the system of air.
- Cover the registers during dusty work, and turn the system back on after the cleanup, not before.
- Get the heating and cooling tuned up. The fan, the coil and the drain line get cleaned at a tune-up, and the EPA recommends a gas furnace be inspected and serviced before each heating season.
How often to clean a dryer vent: every year
Once a year, and sooner if your clothes start taking longer to dry. That’s Fairfax County Fire and Rescue’s advice to every homeowner: once a year, “or more often if you notice that it is taking longer than normal for your clothes to dry, clean lint out of the vent pipe or have a dryer lint removal service do it for you.”
The reason is fire. The National Fire Protection Association counted an average of 13,820 home fires a year involving dryers between 2014 and 2018, and failure to clean caused 32 percent of them, more than any other cause. The lint screen catches most of it. What gets past it builds up in the line behind the dryer and at the elbows, where you can’t see it.
Dryer vent cleaning is $199, normally $298, with a year of Comfort+ membership included, or $199 when we’re already there for a duct cleaning. That year of Comfort+ also covers a water heater flush with a sewer camera inspection and a heating and a cooling maintenance visit, so the yearly jobs are on our calendar instead of yours. Some HOAs require the dryer vent yearly and want the receipt; you get a dated invoice either way. More on our dryer vent cleaning page and the membership page.
What it looks like when the ducts are due
When the look says yes, the cleaning itself is a vacuum strong enough to pull the whole system inward and a brush run down each line, with the floors covered where the hoses go. Return Air Duct Cleaning takes a couple of hours; Whole Home Air Duct Cleaning takes most of a day. Every deal we’re running is on our offers page.
Questions about how often to clean ducts and vents
How often should you clean your dryer vent?
Once a year, or sooner if clothes are taking longer than normal to dry. That’s Fairfax County Fire and Rescue’s advice, and some HOAs in Northern Virginia require it yearly.
Do air ducts need to be cleaned every year?
No. The EPA says “Duct cleaning is not considered to be a necessary part of yearly maintenance” for a heating and cooling system. The yearly part is filter changes, cleaning the coils and drain pan, and checking the heating equipment.
How often should air ducts be cleaned with pets?
With dogs or cats that shed, look closer to every 3 years than every 5, starting with the low wall returns, which fill first. Clean when the look shows buildup.
Should I clean the air ducts after a renovation?
If the system ran while drywall was being sanded, take a look, because that fine dust settles in the returns. If the registers were covered and the system was off for the dusty work, you may not need to.
Should I get the air ducts cleaned when I buy a house?
It’s a good time to look: you don’t know the last owner’s habits, and the rooms are empty. Have the covers off and photographed before the furniture goes in, and clean if the photos show buildup.
How do I know when it’s time?
Take a return cover off and look with a flashlight, or have us photograph them. Grey felt on the walls, clumps, debris or droppings mean it’s time. Bare metal with a light film means it isn’t.
How much does it cost?
Return Air Duct Cleaning is $298 and Whole Home Air Duct Cleaning is $598 right now, regularly $798, for one system in a home up to 2,000 square feet. Dryer vent cleaning is $199, normally $298, with a year of Comfort+ membership included. A bigger house or a second system, the price estimator works out yours.
Not sure when yours were last done?
Most people aren’t, and plenty of houses have never had it done. Book a visit and ask for the camera photos first: our technician photographs what’s in your ducts and shows you, with no charge for the look, including when the answer is that they’re fine. Call (703) 997-9757 or book online. Typically the same day or the next day, and we’ll tell you honestly when we can get there.
“Swift Pro just performed a vent cleaning at my 50 year old house that has never had a vent cleaning. Very satisfied with price and service, the technician Aaron was polite, professional, punctual and answered all of my questions without making me feel like a dummy.”
Not sure it’s worth doing at all? Here’s when air duct cleaning is worth it, and when it isn’t. If the look says yes, here’s how long air duct cleaning takes.
SwiftPro Heating, Cooling & Plumbing is based in Chantilly and does air duct cleaning, dryer vent cleaning, heating, cooling and plumbing across Northern Virginia under Virginia Class A contractor license 2705192276. Customers rate us 5.0 stars across 1,132 reviews on Google, Angi, Yelp, the BBB and Facebook.
