How to Choose an Air Duct Cleaning Company in Houston

Start With What Texas Does and Does Not Regulate

Here is a fact most homeowners never hear. Duct cleaning by itself is not a licensed trade in Texas. Any company can print flyers tomorrow and start selling it. A state license from TDLR is only required when a company repairs or modifies the HVAC system itself, like the coil, the blower, or the refrigerant lines.

That means the state is not screening duct cleaners for you. The screening is your job, and the next four checks do most of the work.

Four Checks That Filter Out Most Bad Companies

• Proof of insurance. Ask for a certificate of general liability insurance. A crew will be working around your furnace, your attic, and your ceilings. If they damage something and have no coverage, the repair bill lands on you.
• A written, all-in price. The quote should name the number of HVAC systems, say whether supply ducts and returns are included, and list every possible extra charge. If the person on the phone cannot give a straight answer, the price will grow once the crew is inside.
• Camera proof. Good companies inspect ducts with a camera and show you the pictures before and after. This one habit removes almost all the guesswork. If your ducts are clean, an honest company says so and leaves.
• Real local reviews. Read the negative reviews first and watch for one pattern: a low advertised price that tripled on site. That pattern is the single most common complaint in this industry.

Red Flags That Should End the Call

Some warning signs are reliable enough that you can stop right there. Per vent pricing that is not disclosed up front is the classic bait and switch setup. Scare tactics about deadly mold, diagnosed from the doorway without a camera or a lab test, are a sales script. A company with no physical address in the Houston area, no insurance certificate, and a name that changes between the ad and the invoice is not a company you want in your attic.

Also be careful with equipment claims. Real duct cleaning needs strong suction plus agitation tools like brushes and air whips that knock debris loose. A shop vacuum held against a vent cover is theater, not cleaning.

Why This Matters More in Houston

Houston ducts carry a heavier load than ducts in most cities. Humidity feeds mold in any duct run that has taken on moisture, and long pollen seasons keep the dust supply coming. In older neighborhoods like Bellaire and Spring Branch, many homes still run on ductwork that is decades old, with sagging flex duct that collects dust in every low spot.

That workload attracts both serious companies and quick-buck operators, because there is always demand. The checklist above is how you make sure the crew that shows up belongs to the first group.