Duct Cleaning Cost: $450 to $1,000 a System, When It Helps

How much does air duct cleaning cost

Prices for a forced-air system in an average-sized home. Mold removal, rodent cleanup and duct repair are extra.

HomeGuide's October 2025 guide puts air duct cleaning at $450 to $1,000, the same range EPA gives, and $25 to $50 per supply vent. HomeAdvisor's 2026 average is lower at $390, typically $271 to $509 and up to about $800 for large or heavily contaminated systems. HomeAdvisor tells readers to be cautious with unusually low-priced offers and to get at least three estimates.

Is duct cleaning worth it? What EPA says

For most homes, no. EPA says "duct cleaning has never been shown to actually prevent health problems," and that it "does not recommend that the air ducts be cleaned routinely, but only as needed." It also says EPA does not set duct cleaning standards or certify, endorse or approve duct cleaning companies, so any claim of EPA approval is false.

Cost guides lean the other way: HomeGuide says most recommend cleaning every 3 to 5 years, and HomeAdvisor attributes the same interval to NADCA, the duct cleaning trade association. The government guidance is the more cautious one. Clean when one of EPA's conditions applies, and change the filter on schedule in the meantime; ENERGY STAR says to check it monthly.

When to clean air ducts

EPA lists three reasons to consider cleaning:

• Substantial visible mold growing inside hard-surface (sheet metal) ducts or other parts of the system. Mold inspection and mold remediation cover testing and removal.
• Vermin. Ducts infested with rodents or insects.
• Clogged ducts. Ducts clogged with excessive dust and debris, or particles blowing out of the supply registers.

Ask the company to show you the dirt with a camera or a removed register before you agree.

What a proper duct cleaning includes

A real duct cleaning covers the whole system, not just the ducts. EPA says the provider should clean the supply and return ducts, registers, grilles and diffusers, heat exchangers, cooling coils, drain pans, the fan motor and housing, and the air handling unit housing, and warns that skipping one part can recontaminate the rest. Ask for the work to follow NADCA's standard, which NADCA calls ACR, and ask the contractor to list in writing which components will be cleaned.

On chemicals, EPA says research has not shown biocides or sealants to be effective in duct cleaning, nor what their health effects are, and it recommends against routine use of sealants. NADCA's guide says to ask to be told if any chemical will be used and to ask for its safety data sheet. Leaky or damaged ducts are a repair, not a cleaning; HomeGuide's duct cleaning guide puts duct sealing at $1,000 to $6,000.

Duct cleaning scams: warning signs

• A very low advertised price. A 2011 BBB Northwest Florida warning described ads at $49.95 to $89.95 followed by charges that were significantly higher.
• Mold "found" on the spot. The same BBB warning said crews ran tests that found mold and pushed expensive work, and that the results were often bogus. Get a second opinion before paying for mold work.
• Health claims. EPA says not to hire duct cleaners who make sweeping claims about health benefits.
• Routine cleaning. EPA says to avoid companies that recommend duct cleaning as a routine part of maintenance.
• "EPA certified." EPA does not certify duct cleaners.
• No written price. EPA says get written estimates from at least three companies and a written agreement stating the total cost and scope before work starts.

EPA also suggests checking references and your local consumer affairs office or Better Business Bureau, and asking whether the company holds any license your state requires. NADCA's guide says its members must keep at least one certified Air Systems Cleaning Specialist (ASCS) on staff and carry general liability insurance; ask for proof of both.

Dryer vent cleaning: cost and fire risk

Dryer vent cleaning costs $80 to $250 in HomeGuide's guide and $100 to $170 on its own in HomeAdvisor's, or about $100 added to a duct cleaning. Of the two, the dryer vent is the one with a documented fire risk:

The most recent national breakdowns we found are from 2007 (USFA) and 2012 (NFPA).

USFA's advice: clean lint from the exhaust pipe and the back of the dryer regularly, use rigid aluminum or steel duct or spiral-wound aluminum flex rather than white vinyl hose, keep the run short with few bends, do not run the dryer when you are out or asleep, have gas dryers inspected each year, and clean the vent about every 2 to 3 years, more often for long runs.

Air duct cleaning near me: what to ask

1. Why do my ducts need cleaning? The answer should match one of EPA's three reasons.
2. What is the total price, in writing? Per vent, per system, and any add-ons.
3. Which components will you clean? Ducts, registers, coil, drain pan, blower and air handler, per EPA.
4. Will you use any chemicals? If so, which, and can I see the safety data sheet?
5. Do you follow NADCA's ACR standard, and who on the crew is ASCS certified?
6. License number and proof of insurance. Several states require a license, per EPA.

If the real problem is a system that will not cool, see AC not cooling; for the equipment itself, HVAC repair and AC repair. If insulation around attic ducts is the issue, attic insulation cost covers sealing and insulating. Duct cleaning sits with other jobs on home repair costs.

Calls go to an independent company that serves your area and takes this kind of job. Ask for its license number and proof of insurance yourself. How calls work.