Pet Dander and Dust engineering anchor: pet dander HVAC filter upgrade
Pet Dander and Dust engineering for Los Angeles homes runs on measured data, not marketing claims. manage hair and particles at the return path before they load the blower and cabinet
Pet dander filtration scope focuses on the return-side air path as the leverage point because the central return is typically within 8 feet of where pets sleep and shed. Cat allergen Fel d 1 is produced in saliva and sebaceous glands, deposited on fur during grooming, and shed into the air on dander and skin flakes; carriers span a wide size range with smaller carriers (under 5 microns) remaining airborne longer. Dog dander follows similar patterns. MERV 13 captures most carriers in the 1–10 micron range when the filter actually receives 100% of return air. After 5+ years of unsealed return-side bypass in pet households, the blower wheel and indoor coil typically carry visible accumulation that requires professional cleaning before a new filter cabinet retrofit.
Authoritative sources cited throughout: EPA MERV guidance, AirNow PM2.5, ASHRAE 62.2 ventilation.