How to Choose an Air Duct Cleaner: Scams, Certifications and Red Flags
Air duct cleaning is easy to advertise and hard to check. The work happens inside walls and ceilings, so homeowners often cannot see whether the job was done right.
Here is how to tell an honest, qualified duct cleaner from a bait-and-switch operation, and the questions to ask before anyone comes into your home.
Be wary of whole-house prices that seem too good to be true, ask what equipment will be used, confirm NADCA certification and a Michigan mechanical contractor license, and get a clear written scope before work begins.
The Blow-and-Go Problem
Almost every legitimate duct cleaning company has run into them: operators who advertise whole-house air duct cleaning for $49, $99 or some other price that cannot cover a proper job. They reach homeowners through mailers and online ads.
Once inside the home, the price often climbs with add-ons, or the ducts get a quick, cursory cleaning at best. In the industry these outfits are called "blow and go" cleaners. Network news programs, including a Dateline segment, have exposed companies running this kind of bait and switch.
Read more in our article on $49 air duct cleaning, and see why prices differ in Why Air Duct Cleaning Costs Differ.
Three Warning Signs
- The price is far lower than everyone else's. A very low quote often means the final bill will be higher, or the work will be incomplete.
- The equipment is small and portable. Ask what kind of vacuum will be used. Small portable units often cannot produce the airflow needed to pull debris through an entire duct system. Safety King uses truck-mounted Giant Power Vacuum equipment.
- The scope is vague. A proper cleaning covers the supply and return ducts, registers and grilles, and the air-handling components. If a company cannot explain what it will clean and how, keep looking.
Why NADCA Certification Matters
The National Air Duct Cleaners Association (NADCA) sets the industry standard for cleaning HVAC systems. Its standard promotes source removal, meaning contaminants are physically removed from the system and captured, not just stirred up.
NADCA certifications show that technicians have learned and been tested on those methods:
- ASCS (Air System Cleaning Specialist): the core certification for anyone cleaning air duct systems.
- VSMR (Ventilation System Mold Remediator): for mold remediation in HVAC systems.
- VMT (Ventilation Maintenance Technician): training covering ductwork and access openings, safety and proper procedures.
Safety King technicians hold these certifications, including Anthony Francis and Jason Doolittle, who earned both ASCS and VSMR. Safety King's founder, Michael S. Palazzolo, was a NADCA charter member in 1987 and served as NADCA president in 1991.
Check the License
In Michigan, ductwork is a regulated mechanical work classification. Safety King operates under Michigan Mechanical Contractor License 7111248, Classification 3 – Ductwork. Any contractor's license can be verified through the State of Michigan. See our license information.
Questions to Ask Before You Hire
- Is the price for the whole house, and what exactly does it include?
- What equipment will you use, and where is the vacuum source?
- Are your technicians NADCA certified?
- Are you licensed for ductwork in Michigan?
- Will you inspect before and after, and show me the results?
- Will you tell me if my ducts do not need cleaning?
An Honest Recommendation Includes "Not Yet"
A trustworthy company will tell you when cleaning is not needed. Safety King inspects first and recommends cleaning when the condition of the system calls for it.
Frequently Asked Questions
How do I avoid air duct cleaning scams?
What does NADCA certified mean?
Why is $49 air duct cleaning a red flag?
Does a duct cleaner need a license in Michigan?
Get It Done Right the First Time
Safety King has cleaned Michigan duct systems since 1969 with NADCA-certified technicians and truck-mounted equipment. Call 1-800-AIR-DUCT or schedule service online.
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