Disclaimer

Informational only

This site explains what published sources establish about residential duct cleaning: what the U.S. Environmental Protection Agency (EPA) recommends, what enforcement records show, what the service typically costs, and how to evaluate a company. That is general information for a general audience. It is not an assessment of your house, your ductwork, your equipment, or your air.

We have no field technicians, no licensed heating, ventilation, and air-conditioning (HVAC) professionals, no engineers, and no certified mold assessors, and we have never inspected a duct system. The editorial team page is explicit about what that means for the work. Read this site to understand the evidence and to ask better questions. Do not read it as a substitute for a qualified person opening your system and looking.

Not professional advice of any kind

• Not HVAC or building advice. Nothing here should be treated as an engineering opinion, a technical specification, or a recommendation about work on your equipment or ductwork.
• Not medical advice. We report EPA’s finding that duct cleaning has never been shown to prevent health problems, and we do not claim the service treats allergies, asthma, or any other condition. If someone in your household is unwell, that is a question for a clinician. Building maintenance and medical care are different subjects and we do not blur them.
• Not legal advice. We describe enforcement actions and regulatory positions as published by the agencies and courts involved. That is reporting, not an opinion about your rights, your contract, or a dispute you may be having with a company. Consumer protection law varies by state.
• Not financial advice. Spending decisions about your home are yours.

Cost figures are estimates, not quotes

Every price on this site comes from a published source or from a model we disclose in full, and each one carries a label saying how well supported it is. Some are backed by several independent publications. Some come from exactly one. Some are our own estimates, marked as such.

None of them is a quote. No duct cleaning company has agreed to any figure published here, and none is obliged to honor one. Prices depend on the number of systems in a home, how accessible the ductwork and components are, the type of duct, how contaminated the system actually is, and where you live. A quote above our range is not evidence of dishonesty, and a quote below it is not evidence of a bargain; both are reasons to ask precisely what is included.

One figure deserves its own warning. The widely cited range of $450 to $1,000 per heating and cooling system originates with EPA and has not changed since at least January 2021, despite appearing on a page that carries a recent update stamp. We cite it because it remains the reference point for full-scope quoting, and we disclose its age every time. Treat it accordingly.

Conditions in your home need in-person inspection

EPA’s guidance turns on what a visual inspection of your specific system shows. That is not something that can be done remotely, from a photograph, or from a description of a smell.

Mold is the sharpest case. EPA states that visual inspection alone cannot confirm mold and that expert or laboratory analysis may be needed; laboratory confirmation costs roughly $50. It also notes that duct insulation which has become wet or moldy cannot be effectively cleaned and should be removed and replaced, and that the underlying moisture source must be corrected or the problem will return. Our mold page and decision tool set out what the evidence supports, and neither can tell you what is inside your ducts.

If you have been told there is mold in your system, the cheapest sensible next step is confirmation from someone with no financial interest in the answer.

Licensing requirements vary by location

Requirements for duct cleaning and related trades are set at state and sometimes municipal level, and they differ. In some places contractors must be registered or licensed; enforcement actions have been brought against operators who were not. Certification from a trade association is a voluntary industry credential and is not a government license, a point we make in full on the certification page.

We cannot tell you what your jurisdiction requires. Check with your state or local consumer protection or contractor licensing authority before hiring, and verify any credential directly with whoever issues it rather than trusting a logo.

No endorsements

We name companies only where they appear in documented enforcement actions, published studies, or investigative reporting, and we name them as those sources do. We do not recommend, rank, endorse, or refer contractors, and no company can pay for coverage here. A link to a source is a citation and nothing more.

Accuracy over time

Sources are revised, prices move, pages disappear, and agency guidance is updated. We review pages on the schedule set out in our editorial policy and correct errors visibly under the corrections policy, but we cannot guarantee that every statement is current at the moment you read it. Check the review date shown on each page, and tell us if something has gone stale.

What to do next

• Terms of use — the rules this disclaimer forms part of.
• Editorial team — what we are qualified to do, and what we are not.
• Do I need duct cleaning? — the evidence-based version of the question, with its limits stated.

Sources & references

• U.S. Environmental Protection AgencyShould You Have the Air Ducts in Your Home Cleaned?Page last updated February 19, 2026Source for the reliance on visual inspection, the limits of visual inspection for mold, and the $450-$1,000 per-system figure discussed here.
• U.S. Environmental Protection AgencyJanuary 2021 archived snapshot of the same duct cleaning guidanceSnapshot dated January 19, 2021Evidence that the cost figure has not changed in at least five years.
• National Air Duct Cleaners AssociationAvoid Air Duct Cleaning ScamsUndatedIndustry guidance, including its warning that some companies falsely claim membership.