Is Air Duct Cleaning Worth It? What the EPA Says

When air duct cleaning is worth it

The EPA lists three situations where you should consider having your ducts cleaned:

• Visible mold growing inside sheet-metal ducts or other parts of the system.
• Rodents or insects living in the ducts.
• Ducts clogged with excessive dust and debris, to the point that dust blows out of the registers.

Other times it makes sense: after a renovation that put drywall or sawdust into the system, when you’ve moved into a home and don’t know its history, or when the previous owners had pets.

When it probably isn’t worth it

If you look inside your ducts and don’t see large deposits of dust, mold or pests, the EPA says cleaning is probably unnecessary. Much of the dust in ducts sticks to the duct walls and doesn’t necessarily get into your rooms. Duct cleaning also won’t fix dust that comes from everywhere else in the house. We’d rather tell you that than sell you a cleaning you don’t need. If we look at your system and it doesn’t need cleaning, we’ll say so.

Does air duct cleaning help with allergies?

The honest answer: research hasn’t shown that duct cleaning prevents health problems or reduces allergy symptoms. What it does is remove the dust, pet hair and debris that have built up in the system. Many people who call us have pets or allergies and want that buildup gone, and that’s a fair reason, as long as no one promises it will cure anything.

What makes a duct cleaning worth the money

A good cleaning removes the buildup from the system instead of just stirring it up. That means strong vacuum suction while tools loosen the dust, reaching the supply lines, return lines and trunk lines, and cleaning the registers. The EPA also warns that if parts of the system are skipped, the clean ducts can get dirty again. We use a powerful HEPA-filtered vacuum and air-powered agitation tools to pull dust and debris out of your supply lines, return lines and main trunk lines, and we clean the registers and grille covers. The dust ends up in our equipment, not your home, and our crew wears boot covers inside.

Sanitizers and sealants

Some companies sell sprayed sanitizers or sealants as an add-on. The EPA says there isn’t enough research on how well these work in ducts, and it recommends against sealants except in unusual cases. We don’t push them.

Frequently asked questions

Is air duct cleaning a waste of money?

It can be if your ducts only have light dust. It’s worth it when there’s heavy dust and debris, visible mold, pests, or construction dust in the system.

What does the EPA say about air duct cleaning?

The EPA says duct cleaning has never been shown to prevent health problems and shouldn’t be done routinely, but it’s worth considering for visible mold, pests, or ducts clogged with dust and debris.

Will duct cleaning reduce dust in my house?

It removes the dust built up in the ducts, but household dust comes from many sources, so it won’t stop dust from settling on furniture.

Do you tell people when they don’t need duct cleaning?

Yes. If your system doesn’t need it, we’ll tell you.

Related guides

• Signs your ducts need cleaning
• How often to clean air ducts
• How much air duct cleaning costs in Vermont
• Duct cleaning after a renovation or moving in
• How to choose an air duct cleaner
• Why is my house so dusty?
• How long duct cleaning takes
• Dryer vent cleaning

Sources

• U.S. EPA: Should You Have the Air Ducts in Your Home Cleaned?
• Consumers’ Checkbook: Air duct cleaners