Air Duct Cleaning Scams

Four different problems that all get called “a scam”

Homeowners use one word for four unrelated situations. Regulators do not, and neither should you, because the response to each is different. Sorting your own experience into the right box tells you whether you are looking at a police matter, a consumer complaint, a chargeback, or a bad afternoon.

Most of what circulates online as “duct cleaning scams” is category (c) with the vocabulary of category (a). That inflation is not harmless. It makes real enforcement cases look like generic complaints, and it makes honest companies with sloppy coupon design look like criminals.

What the enforcement record actually shows

These are court and attorney general records, not survey results or industry blog posts. Each is a specific company in a specific state, and each one is linked in the sources at the foot of this page.

Washington State: robocalls, spoofing, and a $10 million judgment

The Washington State Attorney General sued three related duct cleaning companies in September 2019. Verified fact The state documented more than 13 million robocalls to over a million Washington residents, with one consumer receiving 169 calls. The companies used caller ID spoofing across more than 100 numbers, displaying local-sounding names such as “Seattle Duct Cleaning.”

The pricing findings are the part worth memorizing. Services were advertised at $29 to $55. Charges frequently exceeded $1,000. Coupons displayed a “regular” price of $150 to $225 that the company had never actually charged anyone, which is what converts a discount claim into a false statement of fact. The advertisements omitted that only half of the heating and cooling system was included in the advertised price. The companies also sold roughly $1,200 “VIP memberships” that entitled the customer only to annual visual inspections, not cleaning. Around 100 fake five-star reviews were posted in a single week.

In June 2020 the court ruled the companies had engaged in unlawful robocalling. In August 2020 a judge ordered $10 million in penalties plus a permanent injunction.

Oregon: the same product at $40 and at $775

The Oregon Department of Justice filed a civil complaint in Multnomah County in October 2019 against the same corporate family. Verified fact The complaint describes services advertised at $39 to $55 against claimed “regular” prices of $169 to $225, and alleges: “Defendants have never sold the advertised service for $169 or $225.” Upsell plans were offered at $825, $2,500, and $3,500.

The single most useful detail in the entire published record sits in this complaint. The state alleges that the same ultraviolet light was sold to one customer for $40 and to another for $775, and that a sanitizing spray was charged at anywhere from $1 to over $300. Technicians, according to the complaint, were given a general range to charge rather than a price.

That is the clean line between category (b) and category (a). An upsell has a price. If the price depends entirely on what the technician thinks the customer will pay, the “price” was never a price.

New Jersey: coupon bait and $1.71 million in penalties

The New Jersey Division of Consumer Affairs announced action in April 2011 against companies operating as United Air Care and Indoor Air Care. Verified fact Coupons advertised “Whole Duct House Cleaning” at $37.95 to $69.95, which the state said were used to “bait the buyer into purchasing higher-priced services.” The companies were also unregistered as home improvement contractors. The result was $1.71 million in civil penalties plus $68,157.36 in restitution.

Colorado: $35 advertised, up to $1,000 charged, and reopening under new names

In November 2013 the Colorado Attorney General moved against several related companies trading as Seabreeze Air, Quality Air, and Fresh Air. Verified fact The advertised price was $35; consumers were charged up to $1,000. More than 230 complaints were involved and a temporary restraining order was issued.

Two details from Colorado deserve attention. First, the advertised job length was two to three hours when the work as described actually required five to eight. A price that cannot buy the labor it implies is a signal available to you before anyone enters your home. Second, the case involved phoenixing: telling courts the business had closed, then reopening under new names. That is why a company’s specific legal name, not just its brand, is the thing worth checking.

Michigan: the “blow-and-go” warning

Michigan Attorney General Dana Nessel issued a consumer alert in December 2023 about air duct cleaning scams. Verified fact The pattern described is rock-bottom advertised pricing followed by on-site upselling, including mold removal, and work performed so carelessly that dirt is blown onto drapes, carpets, and furniture. The alert also lists social media red flags: generic geographic account names such as “Duct Cleaners Michigan,” recently created accounts, locked profiles, and posts that protest the service is not a scam.

Separately, a Michigan Attorney General action against Kohn Home Cleaning Services appears in the action list for Operation Call It Quits, the nationwide robocall sweep announced in June 2019.

Missouri and North Dakota: two smaller but instructive cases

A Better Business Bureau warning from St. Louis in November 2011 described $49 advertised specials producing bills of $1,799, $2,700, $2,780, and $3,000, including an 81-year-old consumer charged $1,799. Verified fact Technicians were reported to “discover” mold, bacteria, or furnace problems and press for an immediate purchase.

In January 2025, a Fargo television investigation reported a homeowner who responded to a $298 offer posted on a neighborhood app and received a $399 invoice, after which the heating system failed within days. Single source North Dakota and Minnesota Secretary of State and Attorney General offices could not identify the business as licensed. That case sits mostly in category (d), and it is a reminder that “is this company registered at all” is a faster question than “is this company honest.”

Oregon and Washington consumers, in their own words

A television investigation in the Pacific Northwest documented two homeowners who responded to the same style of advertisement. Verified fact One responded to a $39 duct and $99 furnace offer and received a $1,250 bill including a five-year VIP membership, which was later sent to collections. Another responded to a $39 advertisement and ended with a $1,794 VIP package. She described being home alone with her children when two men arrived and said she “felt cornered and pressured.”

That is the mechanism. The advertised price does not exist to be sold. It exists to place two technicians inside your house at a moment when saying no is socially expensive.

Category (b): where upselling stops being legal

A technician who inspects your system and recommends a coil cleaning, a UV light, or a sanitizing treatment is not committing a crime. Duct systems do sometimes need more than a basic cleaning, and a company that never recommends anything is not necessarily more honest.

The evidentiary markers that regulators actually used are narrower than “they tried to sell me something”:

• Identical work at wildly different prices. Oregon’s alleged 19-fold spread on one UV light is the clearest published example. If the price of an add-on is not written down anywhere, there is no price.
• A discount from a price that was never charged. Both Washington and Oregon documented “regular” prices the companies had never sold at. A discount claim is a statement of fact about past prices, and it can be false.
• Findings that cannot be verified. The National Air Duct Cleaners Association (NADCA), the industry’s own trade body, warns that being told mold or another dangerous substance is present without a proper inspection is a red flag. Industry guidance When an industry association says this about its own market, take it seriously.
• Payment demanded before the work is described in writing. An itemized written estimate before work begins is not an unreasonable request, and its absence is the condition every one of these cases depended on.

None of that makes a same-day recommendation automatically dishonest. It makes an unpriced, unwritten, unverifiable, same-day recommendation a bad thing to accept.

The sanitizing, antimicrobial, and biocide upsell

This is the add-on most often attached to a low advertised price, and it is the one where federal rules are unusually clear. Published add-on pricing runs roughly $75 to $250 Typical range across three sources, but the enforcement record shows the same category of product billed at $1 and at over $300 in Oregon.

The EPA’s position, stated precisely:

• A small number of products are registered by the EPA specifically for use on the inside of bare sheet metal air ducts. So it is not accurate to say that all duct sanitizers are unregistered or unlawful.
• No products are currently registered by the EPA as biocides for use on fiberglass duct board or fiberglass-lined ducts. If your system has fiberglass duct board or an internal fiberglass liner, there is no EPA-registered biocide for it.
• Applying a general-purpose disinfectant inside an HVAC system whose label does not specifically authorize heating, ventilation, and air-conditioning (HVAC) use is a use inconsistent with labeling. Using a pesticide product inconsistently with its label directions violates federal law. A product must be EPA-registered for a specific use before it can legally be used for that purpose.
• The EPA notes that a general “hard, non-porous surfaces” claim on a label does not extend to HVAC components unless HVAC use is specifically included on that label, and warns such use could produce significant indoor exposures.
• Little research has been conducted demonstrating the effectiveness of most biocides and ozone used inside ducts, and little is known about the potential toxicity of these products under typical use conditions.

The practical consequence: “antimicrobial fogging” of a fiberglass-lined duct system has no EPA-registered basis. That is not a claim that any particular company broke the law — label compliance depends on the specific product and the specific duct material. It is a claim about what you are entitled to ask.

One more point that regulators do not make but the EPA’s own guidance implies: if insulated ducts have insulation that got wet or moldy, that insulation cannot be effectively cleaned and should be removed and replaced. A chemical treatment sold as an alternative to replacement is selling you something the EPA says will not work.

Category (c): advertising that is misleading without being fraud

In February 2013 the Better Business Bureau serving Denver and Boulder studied 62 air duct cleaning companies. Verified fact It asked 21 of them to change their advertising. 18 complied. Three refused and received F ratings.

Read that carefully, because it cuts both ways. Roughly a third of the companies studied had advertising the BBB considered defective — a large slice of a local market. But 18 of 21 fixed it when asked, and no fraud was alleged against them. That is a story about bad coupon design and competitive pressure to post the lowest visible number, not about organized deception.

The study also produced the best published example of per-vent fine print anywhere in the record. One company advertised $242 for “whole house air duct and carpet cleaning.” The fine print limited it to 5 rooms and 10 vents. The owner conceded: “It is not the whole house.”

NADCA warns about the same structure from the industry side, cautioning homeowners about extremely low-cost “whole house” specials that often cover only limited portions of the system and may exclude the air handler, blower fans, coils, registers, or the access openings needed to do the work at all. Industry guidance

So the useful test is not “is this price too low.” It is “how many vents, how many returns, and which components does this number include?” A typical home has more supply registers than most advertised specials cover, and returns are usually priced higher than supplies. Our cost calculator exists partly so you can convert an advertised headline into a realistic vent-count total before anyone knocks on your door, and the cost guide explains why published ranges disagree with each other.

Category (d): a bad job is not a crime

“Blow-and-go” is the industry’s own term for the low-effort version of this service, and it is used by both NADCA and the Michigan Attorney General. NADCA’s phrasing is direct: “Homeowners should beware of ‘blow-and-go’ air duct cleaning companies.” Industry guidance

The observable symptoms are physical. Dust appears on furnishings after the visit. The technician works from the registers only and never opens an access panel. The whole job takes under an hour in a house where the advertised scope would take several. Colorado’s case put numbers on that gap: two to three hours advertised against five to eight hours actually required.

None of that is fraud. It is a service you paid for and did not receive, which is a contract problem with contract remedies — demand the work be redone, then dispute the charge with your card issuer, then small claims. Those routes are faster and more likely to recover your money than an attorney general complaint, which is aimed at stopping a pattern rather than compensating you.

Claims we could not verify, and why we say so

The following appear constantly in duct cleaning “scam” content. We went looking for the underlying source for each and could not find one that meets our standard. Publishing them anyway would make this page more dramatic and less true.

The fairness caveat this page owes the industry

Everything above is about specific companies. It is not a description of the trade as a whole, and a page about fraud has an obligation not to imply otherwise.

But the opposite error is just as bad. The EPA’s assessment that duct cleaning “has never been shown to actually prevent health problems” applies to the entire service category, including well-run, certified, thoroughly professional companies. Verified fact Hiring a better contractor does not convert duct cleaning into a health intervention. If we used that EPA line only as a stick to beat bad actors with, we would accidentally suggest that the service is health-protective when the right firm performs it, and the EPA does not support that.

The EPA does not recommend routine duct cleaning, only cleaning as needed, and identifies three conditions where it should be considered: substantial visible mold growth inside hard-surface ducts or on other HVAC components; a vermin infestation of rodents or insects; and excessive debris clogging the ducts with particles actually being released into the home from supply registers. Underlying causes must be corrected or the problem returns. Our page on whether you need this service at all works through those three conditions in detail — and the cheapest protection against every scam on this page is discovering you did not need the work.

Duct cleaning scam warning signs checklist

Every item below traces to a documented case or an official warning. Print this page or check the boxes on screen. If you check three or more, stop and get a second quote before anyone starts work.

• The advertised price is under about $70 for a whole house. Every documented enforcement case in our record involved an advertised price between $29 and $69.
• The offer arrived by an unsolicited phone call, especially a recorded one. One Washington case involved more than 13 million robocalls, with spoofed local caller ID and invented local company names.
• The ad shows a “regular” price being discounted. In both Washington and Oregon, the companies were found never to have charged the “regular” price the coupon claimed to discount.
• The advertisement does not state a vent count or which components are included. One Denver ad promising a $242 “whole house” job limited it in fine print to 5 rooms and 10 vents.
• The scope excludes the air handler, blower, coils, or the access openings needed to reach the system. One Washington case involved advertisements that omitted that only half the heating and cooling system was covered.
• The quoted job length is implausibly short for the scope described. Colorado documented two to three hours advertised against five to eight hours actually required.
• Mold or another dangerous substance is announced without a proper inspection. NADCA names this specifically as a red flag, and visual inspection alone cannot confirm mold — the EPA notes expert or laboratory analysis may be needed.
• An add-on is offered without a written price, or the price seems to depend on you. Oregon alleged the same UV light was sold at $40 and at $775, and that technicians were given a range rather than a price.
• A sanitizing or antimicrobial treatment is proposed and the technician will not show you the product label. No product is EPA-registered as a biocide for fiberglass duct board or fiberglass-lined ducts, and label-inconsistent use violates federal law.
• You are asked to sign a multi-year “membership” or “VIP plan” during the visit. One Washington case involved roughly $1,200 memberships that bought only annual visual inspections; a Northwest news investigation documented $1,250 and $1,794 packages, one sent to collections.
• The final number is many times the advertised number. Documented outcomes include $35 turning into $1,000 in Colorado and $49 specials producing bills up to $3,000 in Missouri.
• The company’s reviews arrived in a sudden burst. One Washington case involved roughly 100 fake five-star reviews posted in a single week.
• The social media presence is a generic geographic name, recently created, or locked. The Michigan Attorney General lists these signals, including posts that protest the service is not a scam.
• You cannot confirm the specific legal entity name, registration, or license. A Colorado case involved telling courts the business had closed and reopening under new names, and a 2025 North Dakota case involved a business two states could not identify as licensed.
• You feel pressured to decide while technicians are inside your home. One homeowner in a Northwest investigation described being alone with her children and feeling “cornered and pressured.”

What a legitimate estimate contains

Rather than pattern-matching against bad companies, check the document. A written estimate that contains all of the following is very difficult to turn into any of the four problems above, because each element removes a place where a surprise can be inserted.

1. The full legal business name, physical address, phone number, and any state registration or license number. Brand names change; entities are traceable.
2. A count. The number of supply registers, the number of return grilles, and the number of separate heating and cooling systems in the home. Every published pricing model in the industry is built on one of these counts.
3. An explicit component list. Which of the following are included and which are not: supply ducts, return ducts, the plenum, the air handler cabinet, the blower, and the evaporator coil. NADCA’s own warning about cheap whole-house specials names these as the components most often quietly excluded.
4. Access openings. Whether cutting and properly sealing access openings is included, since a system cannot be cleaned through the registers alone.
5. The method and equipment. Whether the work uses negative pressure with a collection unit, and what agitation tools — rotary brush, air whip — will be used. Steam or other moisture-introducing methods should never be used on ductwork.
6. A total, not a starting point. A single number for the described scope, with any per-vent overage rate stated in advance rather than discovered later.
7. The conditions under which the price can change, in writing, and a commitment that you will be shown and will approve any change before the work is done.
8. Any chemical product named on the estimate, with its EPA registration number, the surfaces it is approved for, and why it is being proposed for your specific duct material.
9. Proof of insurance you can verify with the carrier, not a photocopy.
10. Before and after access. A statement that you may look inside the system before work begins and after it ends. The EPA frames the decision to clean as resting on visual inspection, which makes this your entitlement rather than a favor.

For price context: published sources put full-scope cleaning at $450 to $1,000 per heating and cooling system Typical range, though that specific figure appears in an EPA document unchanged since at least January 2021 and has never been inflation-adjusted. Homeowner-reported spending clusters near $389 Single source — five publications carry that number, but all five draw on a single dataset. Our own planning range for a typical accessible single-system home is $300 to $700 Editorial estimate. A number far below that range is not proof of dishonesty, but it does mean the scope is smaller than the words suggest.

Related questions

If I already paid, can I get the money back?

Sometimes, and speed matters. Dispute the charge with your card issuer first, since that has the shortest clock and the best odds of recovering money. File a complaint with your state attorney general’s consumer protection division and with the Better Business Bureau after that. Attorney general enforcement is aimed at stopping a pattern rather than refunding an individual, though restitution does occur — the New Jersey action included $68,157.36 in restitution alongside the penalties.

Is a company that cold-calls me automatically a scam?

No, but the documented cases relied heavily on it. Unsolicited recorded sales calls to residential numbers are separately regulated, and in the Washington case robocalling was the count the state actually won on. A company you found and contacted yourself starts from a very different position than one that dialed you.

Does hiring a certified company eliminate this risk?

It reduces some of it and not all of it. Certification is a voluntary industry credential, not a government license, and NADCA itself warns that some companies illegally use its logo or falsely claim membership — so a claim of membership needs verifying rather than believing. We cover what certification actually guarantees and what it does not separately.

Should I let them clean the ducts if they are already here and I said no?

You can decline work at the door, including work you agreed to by phone, and you should not feel obliged to justify it. If you have already signed something, ask for the cancellation terms in writing before anyone opens a panel. The pressure documented in these cases was applied precisely at this moment, with technicians inside the home.

What if they find mold?

Ask what the finding is based on. Visual inspection alone cannot confirm mold; the EPA notes that expert or laboratory analysis may be needed and puts laboratory confirmation of whether a substance is mold at roughly $50. A same-visit mold finding followed by a same-visit remediation quote is the exact sequence the Better Business Bureau and the Michigan Attorney General both describe. Our page on mold in air ducts explains what a genuine finding looks like.

What to do next

• The questions that expose a bad quote — each with what a good answer sounds like and what a bad one sounds like.
• What NADCA certification actually means — including how to verify a membership claim, since false claims are a documented problem.
• Printable homeowner checklists — before you hire, before the technician arrives, and what to inspect afterward.
• Whether you need this service at all — the three EPA conditions, and the cheapest possible protection against every problem on this page.
• Convert an advertised special into a realistic total — before anyone is standing in your hallway.

Sources & references

• Washington State Office of the Attorney GeneralAG Ferguson files lawsuit against Washington companies for unlawful robocallsSeptember 24, 2019Complaint against US Air Ducts, Sky Builders and DLM Services: 13M+ robocalls, $29-$55 advertised prices, charges frequently over $1,000.
• Washington State Office of the Attorney GeneralCourt rules Washington air duct companies engaged in unlawful robocallsJune 4, 2020Liability ruling; details the fictitious $150-$225 'regular' prices and roughly 100 fake five-star reviews in one week.
• Washington State Office of the Attorney GeneralJudge orders $10 million in penalties in AG Ferguson's robocall lawsuitAugust 26, 2020$10 million penalty and permanent injunction; the largest verified duct cleaning penalty we located.
• Oregon Department of JusticeState of Oregon v. US Air Ducts u2014 civil complaintFiled October 16, 2019, Multnomah CountyPrimary court document. Alleges the same UV light sold at $40 and $775, sanitizing spray charged from $1 to over $300, and that technicians were given a range to charge.
• New Jersey Division of Consumer AffairsAction against United Air Care and Indoor Air Care duct cleaning operationsApril 5, 2011$37.95-$69.95 'Whole Duct House Cleaning' coupons; $1.71M in civil penalties plus $68,157.36 restitution.
• CBS News ColoradoState shuts down several air duct cleaning companies for scammingNovember 25, 2013Colorado Attorney General action: $35 advertised, up to $1,000 charged, 230+ complaints, and reopening under new names.
• Michigan Department of Attorney GeneralAG Nessel warns Michigan residents about air duct cleaning scamsDecember 12, 2023Government-voice source for 'blow-and-go', debris blown onto furnishings, and social media red flags.
• U.S. Federal Trade CommissionOperation Call It Quits u2014 action listJune 25, 201994 actions. The only duct cleaning entry is a Michigan Attorney General state action; none of the FTC's own seven actions involved duct cleaning.
• CBS News ColoradoBBB study finds bad advertising in air duct cleaning industryFebruary 27, 201362 companies studied, 21 asked to change advertising, 18 complied. Source for the $242 'whole house' ad limited to 5 rooms and 10 vents.
• Patch (Town and Country-Manchester, Missouri)BBB warns against U.S. Air Ducts pricing scamNovember 2011$49 advertised specials producing bills of $1,799 to $3,000, including an 81-year-old consumer charged $1,799.
• KGW (TEGNA)Customers left with $1,000 bills after responding to air duct cleaning adInvestigation$39 advertisements producing $1,250 and $1,794 bills, including multi-year VIP memberships and a collections referral.
• Valley News Live (Fargo)Fargo man warns of alleged unlicensed duct cleaning businessJanuary 7, 2025Single-source account: $298 offer, $399 invoice, heating failure days later, business not identifiable as licensed in two states.
• U.S. Environmental Protection AgencyShould You Have the Air Ducts in Your Home Cleaned?Page last updated February 19, 2026Source for the three conditions warranting cleaning, biocide registration limits, and the $450-$1,000 per system figure, which is unchanged since at least January 2021.
• U.S. Environmental Protection AgencyUse of Disinfectants and Sanitizers in Heating, Ventilation, Air Conditioning, and Refrigeration SystemsPage last updated July 17, 2026A general hard-surface label claim does not authorize HVAC use unless HVAC use is specifically stated on the label.
• National Air Duct Cleaners AssociationHow to avoid air duct cleaning scamsIndustry guidanceTrade association, not a regulator. Source for 'blow-and-go', the mold-without-inspection red flag, cheap whole-house special warnings, and false claims of NADCA membership.