CrewProtect™ 20 cleans the air in your vehicle cabs and small space with airflow of 20 CFM (0.57 CMM). The unit quickly and effectively removes particulates, VOCs (volatile organic compounds), smoke, and aerosols. The no-hassle combination cartridge contains a pre-filter, patented molecular media, and H13 HEPA capturing 99.95%+ of particulates and 95%+ VOCs.