01
Inspection and camera scan
We start with a duct camera through the main plenum and each accessible branch. You see the footage on the monitor. We note debris depth, disconnected joints, crushed flexible duct, and any pest evidence. This takes 20 to 30 minutes and tells us exactly which runs need the rotary brush versus the air whip.
02
Negative air setup
We tie a negative air machine with HEPA filtration into the trunk line and seal the registers. That keeps the attic at negative pressure so nothing we loosen ends up in your living room. Abatement Technologies HEPA units capture particles down to 0.3 microns, which covers mold spores and most rodent allergens.
03
Mechanical agitation
Each branch gets a flexible duct rod with a rotary brush, followed by an air whip on the larger sheet metal runs. Compressed air nozzle work handles the tight elbows where debris packs hardest. We work from the farthest register back toward the plenum so nothing gets pushed into a dead end.
04
Sanitize and reseal
Once the runs are clear, we apply duct sealant and mastic at every joint we opened, then re-tape with foil tape where the original connection failed. Register covers get washed and reinstalled. If we found mold growth in ducts, this is the stage where the antimicrobial treatment goes down.
05
Verification and walkthrough
We re-run the camera, show you the after footage, and check static pressure at the plenum. You get a written summary of what we found, what we cleared, and what to watch. If a run needs replacement rather than cleaning, we tell you that instead of billing you for a cleaning that will not hold.