Why bedrooms in Brentwood run hot when the hallway thermostat says otherwise
What we measure in Brentwood sleep audits is narrower than people expect. Five numbers: noise floor at the pillow (target under 30 dBA), nighttime swing across an 8-hour window (target under 4°F), supply CFM into the room (typical undersize is 60–70 CFM where 95–110 is needed), return free area when the door is closed (often under 12 sq in. where 60–80 is needed), and indoor RH (45–55%). Every other complaint resolves to one of those.
Average summer high near 80°F with winter low around 50°F at an elevation of 315 ft and roughly 5 miles inland. CEC Climate Zone 9. The cooling design temperature for Manual J calculations runs about 88°F, with typical Manual J load landing in the 380-550 sq ft per ton band. Mandeville and Kenter canyons act as heat pockets, running 8–10°F warmer than Brentwood flats on sunny afternoons; multi-system estates often need different thermostat schedules per wing
Brentwood was placed under Palisades Fire evacuation warning in January 2025. Not directly burned. Mandeville Canyon edge was placed under evacuation warning during the Palisades Fire as the perimeter advanced east. Smoke and ash deposited heavily for over a week. Sleep cooling and smoke-event readiness end up sharing equipment decisions in this corridor, so we plan both at once.