Is Air Duct Cleaning Worth It? An Honest Answer
We clean air ducts for a living, and we tell some callers they do not need it. Here is how to know which group you are in.
What the EPA says
The EPA does not recommend that air ducts be cleaned routinely. It says to consider cleaning if there is substantial visible mold inside the ducts or on other parts of the system, if the ducts are infested with rodents or insects, or if they are clogged with dust and debris that is released into the home from the registers.
It also notes that a light amount of household dust in ducts is normal and not a health risk, and that studies have not shown duct cleaning to reduce dust levels in homes or to prevent health problems.
When it is worth it
| Situation | Worth cleaning? | Why |
|---|---|---|
| Visible mold in ducts | Yes, after the moisture is fixed | Otherwise it grows back |
| Rodents or insects in the ducts | Yes | Droppings and nesting material should be removed |
| Dust and debris blowing from registers | Yes | The ducts are the source |
| After construction or a remodel | Yes | Drywall dust and sawdust recirculate for months |
| New home with an unknown history | Have them inspected | Clean only if there is something to remove |
| A generally dusty house | Probably not | Check the filter first |
| “It has been a few years” | No | Time alone is not a reason |
What to try first
Before paying for duct cleaning, change the furnace filter and check that it is the right size and seated properly. A filter with gaps around it lets dust through. Then lift a register and look inside the duct with a flashlight. If you see a thin grey film, that is normal. If you see clumps of debris, pet hair, or anything that looks like mold or droppings, call.
What duct cleaning will not do
Duct cleaning will not cure allergies, will not noticeably lower an energy bill, and will not fix a dusty house if the dust is coming from elsewhere. Be cautious of anyone who promises those results or who wants to spray chemicals into the ducts as a matter of routine.
Want an honest look at your ducts?
Call (816) 239-8989What it costs when it is needed
Air duct cleaning starts at $399 for one system in an average-size home. We look in the ducts and show you what is there before any cleaning starts. For new builds and remodels, see post-construction duct cleaning.
The cleaning that is worth doing regularly
The dryer vent is different. Lint is flammable, and the U.S. Fire Administration found failure to clean was the leading factor in home clothes dryer fires. Dryer vent cleaning once a year is worth it for almost every home.
Source
- U.S. Environmental Protection Agency, Should You Have the Air Ducts in Your Home Cleaned?
Common questions
Does air duct cleaning help with allergies?
There is no good evidence that it does on its own. The EPA says duct cleaning has not been shown to prevent health problems. If ducts contain mold, pests or heavy debris, removing them is sensible, but for allergies a well-fitted, good-quality furnace filter changed on schedule does more.
Does air duct cleaning save energy?
Cleaning the ducts themselves has little measurable effect on energy use. Cleaning a dirty blower, cooling coil and heat exchanger can improve efficiency, according to the EPA, but that is equipment maintenance, which an HVAC technician carries out as part of a regular tune-up.
Is air duct cleaning a scam?
The service is legitimate when there is something in the ducts that should come out. The scam is the very cheap whole-house offer that turns into pressure to buy mold treatments and extras. Ask to see what is in the ducts before agreeing to anything.
How can I tell if my air ducts are dirty?
Remove a supply register and a return grille and look inside with a flashlight. A thin, even layer of grey dust is normal. Clumps of debris, pet hair, construction dust, droppings or dark fuzzy growth mean the ducts should be inspected and probably cleaned.
How much dust in air ducts is normal?
A light coating of dust on the inside of ducts and on register grilles is normal in every home and is not a reason to clean. Dust becomes a problem when it is thick enough to be dislodged and blown into the rooms when the system starts.