PUREFLOW 2014 BMW 535i Cabin Air Filter with HEPA and Antibacterial Technology, PC4329HX RZ18162 4th Stage: Advanced antibacterial micro

4th Stage: Advanced antibacterial micro technology reduces biofouling by suppressing the growth of algae

Advanced multi-layer media supports fresh cabin air and balanced HVAC performance for a more comfortable driving experience—without added fragrance

Includes four 24x24x1 MERV 11 air filters for routine filter changes in residential HVAC systems

HEPA-Level Filtration For Cleaner Air: Captures up to 99

PUREFLOW 2014 BMW 535i Cabin Air Filter with HEPA and Antibacterial Technology, PC4329HX RZ18162 4th Stage: Advanced antibacterial micro1st Stage: For drivers and passengers who suffer from severe allergies, PUREFLOW HEPA (High Efficiency Particulate Air) offers 99. 97% efficiency, capturing microscopic pollutants including pollen and other allergens (may result in a minor restriction to airflow). 2nd & 3rd Stage: Activated charcoal adsorbs harmful gases like carbon monoxide and sulfur dioxide. This layer is combined with baking soda to absorb bad odors. 4th Stage: Advanced