What Our Duct Camera Sees Inside Houston Homes (Ranked by How Often)

Every job we run starts and ends with a camera in the ductwork, and every customer watches the footage. It's the company's whole philosophy: don't tell people their ducts are dirty, show them — then show them clean.

After a few thousand Houston inspections, the footage sorts into a predictable ranking. Here it is, most common to least, with what each one means for your house.

1. Compacted dust mat (every house, no exceptions)

Not the fluffy dust on your bookshelf — a dense gray felt, pressed onto the bottom of every duct run by years of airflow. Pet dander, skin cells, fabric fiber, Houston's outdoor dust mix. In a home that's never had a cleaning, we typically measure it at a quarter inch or more, and the return side is always worse than the supply side.

This is the layer that re-seeds every room with dust and feeds everything else on this list. It's also the most satisfying before/after footage we film.

2. Construction debris (nearly every house under 15 years old)

Drywall dust, sawdust, tape scraps, the occasional soda can — the newer the house, the weirder the inventory. Duct systems are open holes in the floor for months of construction, and builder cleanup crews clean floors, not ducts. Katy and Cypress new-builds keep us in business on this one.

3. Coil-face fouling (most houses over 5 years)

The evaporator coil is a wall of wet, cold aluminum fins that all your air must pass through. On camera, a fouled coil looks like gray carpet growing on a radiator. Airflow chokes, cooling drops, humidity removal drops with it — and in Houston, less dehumidification means everything downstream gets damper. Coil footage is where customers usually say "oh." We wrote a whole piece on coils because they deserve it.

4. Microbial growth (humid-climate regular)

Spotting and streaking on duct walls and around the coil housing, the visual signature of Houston humidity meeting organic dust. The camera can't tell you the species — that's a lab's job, and anyone who diagnoses "toxic black mold" from a monitor is selling something. What the footage does establish honestly: growth present or not, extent, and location. Then you decide on remediation with evidence instead of fear.

5. Rodent and insect evidence (more than Houston wants to know)

Droppings, nesting material, roach casings, and once, memorably near Jersey Village, an intact snake skin about four feet long. Attic ductwork is warm, sheltered, and connected to everything — pest control seals the entry points, we clear and sanitize what they left behind.

6. Crushed, torn, or disconnected flex duct (1 in 10, roughly)

Sometimes the camera rounds a corner into daylight — a run that's been blowing conditioned air into the attic for who knows how long. Or a flex line pinched flat under a stored Christmas-decoration bin. These findings pay for the inspection several times over: that's cooling you've been buying and not receiving, every month.

7. Lost treasure (rare, cherished)

Toy cars. Report cards from 1994. Jewelry, twice. One wallet, returned to a very confused homeowner. Registers eat things, and ducts keep them.

Why the camera matters more than the vacuum

Any company can park a vacuum truck outside. The camera is the accountability: footage before, footage after, and you judge the difference on a screen instead of taking a stranger's word. If a duct company won't show you the inside of your own ducts before and after — what exactly is the invoice for?

Curious what your ductwork looks like? One inspection answers it, on camera, no imagination required.