Guides and Answers for Homeowners
Where to start
Close to booking? Read how to choose a company and what the work costs. Not sure anything is wrong? Start with the signs your ducts need cleaning.
Every guide here began as a question somebody asked us on the phone. What a clean actually costs, which warning signs are worth acting on, whether any of it helps allergies, and how to tell a real cleaning company from a service that vacuums the ends of your vents.
They are written by Daniel Hoss, who dispatches our jobs, and the numbers in them come from homes we have cleaned and photographed around St. Louis rather than from an industry brochure. Where the honest answer is that you do not need us this year, that is what the guide says.
Which question brought you here?
Each guide opens with a short answer, so you do not have to read the whole thing to get what you came for.
-
Air Duct Cleaning and Allergies: What It Helps and What It Does Not
Cleaning removes a reservoir of dander, pollen and dust, but allergists say no study shows symptoms improving. When it is worth it, and what helps more first.
-
10 Signs Your Air Ducts Need Cleaning, and How to Check
Three of the ten signs are worth acting on and the other seven are only worth checking. How to tell which you have, with a screwdriver and a phone light.
-
Dirty HVAC and Your Health: What the Evidence Says
Dirty ducts are a dust and odor problem, not a diagnosis. What the EPA has actually found, and how to tell whether the dust comes from the system or the house.
-
Mold in Air Ducts: Where It Grows and What It Takes to Remove
Mold usually grows on the wet parts upstream of the runs. How much there is and what it is growing on decide the job, far more than the species does.
-
How to Clean Air Ducts Yourself, and Where a Shop Vac Stops
What you can clean yourself with a screwdriver, a brush and a shop vac, and why the job stops about 7 feet in, before the trunk line and the blower.
-
How Much Does Air Duct Cleaning Cost in 2026?
Most homes around St. Louis pay $450 to $1,000, and the number of openings moves the price more than square footage does. Count yours before you call anyone.
-
How to Choose an Air Duct Cleaning Company
What to ask before you book, what a good answer sounds like, and how to check a company’s credentials yourself in under a minute.
In the community
We also write up the local sponsorships and charity events SafeAir takes part in, from the Twin City Area Chamber to KEEN St. Louis. Those live on the In the Community page.
Rather ask a person?
Call 314-900-3828, or request a visit below. Somebody looks at the system, counts the openings and gives you the price before any work starts. A $25 travel fee applies if no work is done, and it comes off when the work happens that day. Our own service page is residential air duct cleaning.