HVAC Duct Cleaning in Westlake Village, CA

Why Westlake Village duct systems get dirty

Attics here bake all summer. Flex duct inner liner goes brittle and cracks. The outer jacket splits where it meets boots and plenum. Once that happens, the system pulls attic dust and loose insulation fiber straight into supply air. Santa Ana silt and fine wildfire ash settle in attic cavities first, then get drawn through leaky return-side joints. That's the real source. Cleaning the duct interior without closing those openings buys you a few months.

Second cause is airflow. Many 1970s-80s tracts here were built with one undersized central return. Static pressure climbs. Air sneaks around the filter edge instead of through it. You see the result as gray streaking on the ceiling around supply registers.

Brush-adjacent and canyon properties add rodents. Attic and crawlspace gaps let them into duct runs, and droppings plus nesting material end up inside flex. That job is removal, often replacement of the fouled run, not a brush-and-vacuum.

Musty odor on startup usually means condensation on a poorly wrapped supply boot. Check your own boots from the attic side before calling anyone.

Inland homes with no unusual exposure generally need this every three to five years. Pet-heavy, farm-adjacent, or burn-scar-adjacent homes, sooner. Also after any renovation.