The 33mm HEPA H13 pre-motor cartridge filter improves air quality with a high filtration, removing dust, dirt, pollen, smoke, bacteria and mould particles from the air. This medical grade filtration is recommended for cleaning in areas where air quality is essential, including schools, hospitals, childcare centres, vets and aged care facilities. H13 filtration can also assist in improving air quality in places with high levels of air pollution, and where people may suffer from allergies and respiratory issues. This cartridge filter features a twist to lock in place design making it easy to remove and replace, and its usage can prolong the life of the motor. Pacvac approved, genuine spare part. Cartridge filter. EN1822 Certified and tested by GTT in 2022