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1st Stage: Particulate filtration media captures and eliminates matter such as dust and pollen
capturing microscopic pollutants including pollen and other allergens (may result in a minor restriction to airflow)
Designed to maintain consistent airflow through heating and cooling systems
and bacteria on the filter
Designed to capture common airborne particles like dust
PUREFLOW 2021 BMW M440i Cabin Air Filter with HEPA and Antibacterial Technology, PC99458HX pid_19908366 1st Stage: Particulate filtration media1st 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
