Air Filter Replacement in Bodega Bay, CA

Air filter replacement in a coastal fog belt

Bodega Bay stays damp most of the year. Filter media here does not just load with dust. It takes on moisture, sags in the frame, and air slips around the edges. A limp filter can read clean and still be doing nothing. Pull yours and look at the downstream face, not the front.

The bigger problem is usually the slot, not the filter. Older tract homes around west county have undersized return plenums and leaky filter racks. Missing doors. Gaps at the frame. That gap pulls crawlspace or attic air straight past the media and into supply. Sealing the rack matters more than buying a higher MERV number.

Filter choice also has to match the duct you already have. Flex runs sagging or kinked in a hot attic restrict airflow before the filter is involved. Add a dense one-inch pleat and the blower starves. Watch for whistling at the grille, a frosting coil, or short cycling.

Change intervals shift with events here. Wildfire ash. Spring grass and oak pollen. A remodel's drywall dust. Any rodent intrusion. Check monthly during those stretches.

If the media is dark on the clean side, or there is mold on cold supply duct, a new filter is not the repair.