Brentwood weather and what it does to your system
The lower streets keep some ocean influence while the canyons above turn hot and still, so one city carries two different cooling loads and a single sizing assumption fits neither well. Wind events drive smoke and fine ash down those canyons in fire season, which puts duct tightness and filtration on the list alongside capacity. That is why the starting checklist for a ductwork services visit always weighs heat load, dust exposure, and how long the system has to run to keep up in Brentwood and the Westside of Los Angeles.

