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Two things we genuinely cannot do

We cannot recommend, dispatch, or arrange a contractor. We are not a directory, a referral service, or a lead generator, and we do not maintain a list of approved companies. Nobody pays us for placement and we do not pass reader details to anyone, because we do not collect them. If we started recommending companies we would be in the same business as the sites that made this category hard to navigate in the first place. What we can do is give you the tools to evaluate a company yourself: the questions that expose scope gaps in a quote, and what industry certification does and does not guarantee.

We cannot diagnose a problem in your home. Nobody here is a licensed heating, ventilation, and air-conditioning (HVAC) technician, an engineer, or a certified mold assessor, and we have never inspected a duct system. A photograph of a vent, a description of a smell, or an account of what a technician said cannot be turned into a diagnosis from here, and it would be irresponsible to pretend otherwise. The U.S. Environmental Protection Agency (EPA) makes the same point about mold specifically: visual inspection alone cannot confirm it, and laboratory analysis may be needed. Laboratory confirmation costs about $50, which is the cheapest way to check a claim made in your hallway.

If you want to know whether your situation is one of the ones that justifies cleaning, the decision tool walks through the conditions EPA identifies and is honest about what it cannot tell you.

What we do want to hear

• Corrections. A wrong figure, a misattributed source, a dead link, a claim that contradicts another page. See the corrections policy for what happens next. You do not need credentials to send one.
• Better sources. If you know of an enforcement action, an agency document, a standards publication, or an investigation we have missed, that is the single most useful thing you can send us. This site is only as good as the documents behind it.
• Questions we have not answered. If you came here looking for something and did not find it, tell us what it was. Gaps in the site are hard to see from the inside.
• Notes from inside the trade. If you clean ducts for a living and we have described the work in a way that is wrong, we would rather hear it than keep publishing it.
• Citation and reuse questions. Our glossary and facts reference are written to be cited. Ask if you need anything clarified.

How to reach us

Email is the only channel. We do not operate a phone line, and we have no public office or mailing address to give you; this is a small independent publication rather than a company with a front desk.

A useful message includes the page address you are writing about and the specific sentence or figure at issue. If you are sending a source, a direct link to the document is worth more than a description of it.

If you are a duct cleaning company

You are welcome to write, and corrections from people who do this work are taken seriously. Two things are worth saying in advance, so nobody wastes their time.

We do not accept payment for coverage, placement, directory listings, links, or sponsored content, and there is no arrangement under which a company can appear favorably on this site. We also will not remove accurate, sourced reporting about documented enforcement actions. If we have described a case incorrectly, send the correction and we will fix it and say we did.

What to do next

• Corrections policy — what happens after you report an error.
• About the site — what this publication is and how it is funded.
• Questions to ask a company — the practical help we can actually give.

Sources & references

• U.S. Environmental Protection AgencyShould You Have the Air Ducts in Your Home Cleaned?Page last updated February 19, 2026Source for the limits of visual inspection in identifying mold and the approximate cost of laboratory confirmation.