Air duct cleaning
Compare local air duct and vent cleaning pros in your city. 881 pros listed in 493 cities across 45 states.
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Duct And Vent Cleaning by city
Do you actually need it?
Less often than the mailers suggest. EPA “does not recommend that air ducts be cleaned routinely, but only as needed” (EPA). It names three situations where cleaning is worth considering:
- Substantial visible mold growth inside hard-surface (sheet metal) ducts or on other parts of the heating and cooling system.
- Ducts infested with vermin — rodents or insects.
- Ducts clogged with excessive dust and debris, or particles blowing out of the supply registers.
After a renovation that put a lot of dust into the system, or smoke or water damage, are other common reasons to have the system inspected.
What the evidence says
EPA is blunt about health claims: “Duct cleaning has never been shown to actually prevent health problems.” Dust on the inside of a duct mostly stays there. That does not make cleaning useless — mold, droppings and real blockages are worth removing — but treat any promise that it will cure allergies or cut your bills with suspicion.
What a proper job includes
Cleaning only the registers you can see is not duct cleaning. EPA describes a proper job as one that:
- Opens access ports or doors so the whole system can be cleaned and inspected.
- Uses vacuum equipment that exhausts outside the home, or HEPA-filtered equipment if it exhausts inside.
- Loosens debris with controlled brushing alongside contact vacuuming.
- Cleans the whole system — supply and return ducts, registers, grilles, coils, drain pan, fan and housing — not just the ducts.
- Protects carpet and furniture during the work.
If your ducts are lined or made of fiberglass duct board and the insulation is wet or moldy, EPA says it cannot be effectively cleaned and should be removed and replaced.
Avoiding duct cleaning scams
NADCA, the industry’s trade association, warns against “$99 whole house specials”, “blow-and-go” operators who spend a few minutes at each register, and claims of mold made without an inspection or test (NADCA). EPA adds two more red flags: sweeping health claims, and companies that recommend duct cleaning as a routine part of maintenance.
Sanitisers and sealants: ask first
Some companies offer to spray a biocide or a sealant after cleaning. EPA’s advice is not to allow chemical biocides or treatments “unless you fully understand the pros and the cons”, and it does not routinely recommend sealants. If a product is proposed, ask for its name and label, and say no if the answer is vague.
How to choose a duct cleaning company
- Ask whether they follow NADCA’s cleaning standard. EPA advises using providers that do. NADCA says all its members must have a certified Air System Cleaning Specialist (ASCS) on staff, and that the way to confirm membership is its Find a Professional directory (NADCA).
- Ask them to inspect first and show you — photos or a camera — what is in the ducts.
- Get a written scope listing which parts of the system they will clean.
- Ask what equipment they use: negative-pressure vacuum exhausted outside, or HEPA.
- Ask for proof of insurance.
- Dryer vents are a separate job. A clogged dryer vent is a fire risk worth fixing on its own; ask if they clean them.
What affects the cost
- The size of the home and the number of supply and return vents.
- How many heating and cooling systems the house has — each is a separate system.
- What is in the ducts. Mold or rodent contamination takes more time and care.
- Access: attic or crawlspace runs, and whether access doors need cutting.
- Add-ons such as a camera inspection or dryer vent cleaning.
A very low advertised price is a reason to ask what is not included, not a bargain.
Duct And Vent Cleaning cost guide: the factors pros price on →
Common questions
- Is air duct cleaning worth it?
- When there is visible mold in hard ducts, vermin, or heavy debris, yes. As routine maintenance, EPA does not recommend it.
- How often should air ducts be cleaned?
- EPA’s answer is only as needed, not on a schedule. NADCA says frequency depends on several factors, including the homeowner’s preference. Rules of thumb such as every three to five years come from cost publishers, not from EPA.
- Does duct cleaning improve health or allergies?
- EPA says duct cleaning has never been shown to actually prevent health problems. Be wary of any company that promises it will.
- How long does duct cleaning take?
- It depends on the size of the house and the system, and whether there is contamination. A job that takes a few minutes per register is a sign of a “blow-and-go” operator.
- What is NADCA certification (ASCS)?
- NADCA is the National Air Duct Cleaners Association. All its members must have a certified Air System Cleaning Specialist (ASCS) on staff. Check membership in NADCA’s Find a Professional directory.
- Are $99 duct cleaning deals legit?
- NADCA specifically warns against “$99 whole house specials”. They are often a way in the door for an upsell, and the advertised job is rarely a full cleaning.
- Should I let them spray a sanitizer or sealant?
- EPA advises not to unless you fully understand the pros and cons. Ask for the product name and label before agreeing.
- Can you clean fiberglass-lined ducts?
- They can be cleaned with care, but EPA says insulation that is wet or moldy cannot be effectively cleaned and should be replaced.
Related services
Guides
Sources
Safety and standards advice on this page comes from these publishers. Dates are the ones each page shows.
- US EPA, Should You Have the Air Ducts in Your Home Cleaned? (last updated February 19, 2026)
- NADCA (National Air Duct Cleaners Association), Frequently Asked Questions (no date shown; read October 2026)
- NADCA (National Air Duct Cleaners Association), Avoid Air Duct Cleaning Scams (no date shown; read October 2026)