5 Air Duct Cleaning Scams and How to Avoid Them

When it comes to the air you breathe, you’ll do anything to ensure your family is healthy. That’s why you might be enticed by the idea of getting your air ducts professionally cleaned. While it can certainly be appropriate in some cases, you may not know how often you really need to have your air ducts cleaned. More importantly, when you do opt for an air duct cleaning, how will you know the difference between a trained expert and someone simply looking to upsell an unnecessary service? 

Keep an eye out for these red flags to avoid any shady air duct cleaning practices and help ensure you’re working with the right pro for you.

Is Air Duct Cleaning Necessary?

Air ducts connect your heating and air conditioning system to the rest of your home. While dirt, dust, and other allergens can accumulate inside on occasion, significant build-up—enough to cause health issues—is rare.

In fact, the EPA recommends only calling in the air duct cleaners if you:

• Verify the existence of mold in your ducts with a professional inspection

• Recently discovered a rodent or insect infestation in your house

• There is a visible backup of dust and dirt leaving your registers

State and local laws do not typically regulate air duct cleaners, but the National Air Duct Cleaners Associations (NADCA) offers certification and guidelines for good practices. The organization suggests having your air ducts cleaned every three to five years unless you suspect one of the issues above.

When you do call cleaners in for a thorough cleaning, expect it to be just that: thorough. The average cost of an air duct cleaning should range between $270 and $490, but up to $1,000 for large systems of complex issues.

While the vast majority of contractors are reputable, trustworthy, and highly trained pros, keep an eye out for these five red flags to separate the good from the bad.

1. Mold and Dirt Warnings

Purifying your home's air is a buzzy phrase getting thrown around a lot these days. And while your home can contain allergy or asthma-inducing irritants, your air ducts are just one of the many places they could be hiding. More often than not, they’ll get removed by air filters, so you should really focus on removing them from other areas first, like rugs and couches.

Untrustworthy air duct cleaners may just use scare tactics to get you to sign up for either one-time or ongoing air duct cleanings. But as the EPA noted, a professional mold inspection is necessary to identify an issue before hiring someone to remove said mold. You can call in an inspector if you notice an odor coming from your air ducts rather than jumping to a cleaning.

Always get a second opinion if an air duct cleaner claims to have found mold and then hands you a sky-high estimate for removing it. True professionals will expect you to go through the proper channels and double-check their work before spending the money—while scammers may push you to sign on the spot.

2. Cut Rates

That old phrase, "If it's too good to be true, it probably is," comes into play here. Illegitimate air duct cleaners love to outbid their competitors for offering "whole house duct cleaning" for $50 or $100. In some cases, these deals simply help them get in the door to upsell you for more work or do a quick and unthorough job before disappearing.

In other more sinister instances, particularly online, scams like these are a method to get your personal information. Never send a deposit, sign forms, or answer personal questions on the phone without verifying the air duct company as certified and insured. Real companies will not demand personal and financial data upfront.

3. Blow-and-Go Scams

This old scam has happened so many times that it's earned a nickname. Blow-and-go scams simply involve the company coming into your home, quickly vacuuming your vents or blowing compressed air through them, and hitting the road for the next house. 

Reputable experts should inspect all the various parts of your system, not just the vents themselves.

These scammers may also perform the bare minimum of work before alerting homeowners of the extensive and costly work they need to perform in addition to the base price. Be sure to research a company's name on the Better Business Bureau site and ask for recent customer testimonials to ensure the quality of the team's work.

Angi Tip

Air duct cleaning takes an average of two to six hours for most households, so if a pro claims they can do it in less time—and for less money—it could be a scam.

Morgan Rousseau

Content Editor, Angi

4. Bait-and-Switch

Photo: maruco / istock / Getty Images Plus / Getty Images

Similar to blow-and-go, the infamous bait-and-switch adds unwanted services on top of what you already agreed to pay. While the advertised price may have looked like it included all your vents, the scammer may claim that the rate only covered a small part of the system. By the time the work is done, you're paying far more than originally expected. Always be sure to read the small print on flyers and ask your local air duct cleaner to clarify their contract before getting started.

You may encounter someone who "found mold" or "needed to apply a sealant or biocide" to your vents. Some may go so far as to recommend replacing your HVAC vents because of alleged leaks or damage. While reputable contractors often offer biocides and sealants, the EPA has not registered either of these as necessary at this time. Plus, they’ll confirm with you before just doing the work.

Always make sure that you have a full contract in writing before the work begins and report any bait-and-switch tactics to the Better Business Bureau immediately.

5. False NADCA Membership

Scammers may go a step further by listing themselves as certified members of the NADCA. They may even celebrate their false training in their business title. Luckily, you can confirm a company's NADCA status on the organization’s website. The site includes contact information, the size of the team, and how long they've been a member of the organization.