HVAC Duct Cleaning in Irvine, CA

Why Irvine ducts load up with grit and odor

Most of it blows in, not out. Flex branches hang off a sheet metal or ductboard plenum in a hot attic. Collars loosen. Mastic dries and cracks. A boot pulls back a half inch and the run starts breathing attic air. That attic air carries sand-fine grit, and it lands in the first few feet of every supply. Canyon-adjacent and foothill tracts add rodent and insect debris. After fall wildfire events, ash fines settle in the same spots.

Returns tell a different story. Floor and slab-level returns in coastal tracts stay damp longer. Pollen and pet dander pack the return drop into a mat. Mildew smell usually traces to the condensate pan or the coil face, not the branch runs. Cleaning ducts will not fix that smell. The pan has to be addressed.

Work is negative-pressure source removal with brushing of the metal trunks. Boots and registers come off and get cleaned separately. Plenum and coil face get inspected. Leaking collars get sealed, torn flex gets replaced.

Older rigid sheet metal in 1950s-60s homes holds decades of settled dust in horizontal runs. That metal brushes well. Crushed flex does not, it gets swapped instead.