Austin Air Standard Pre Filter

Austin Air Standard Pre Filter is the first stage of the air filtration system. It traps large dust and dirt particles, and placed outside of the HEPA filter to protect the unit and extend the life of the main filter. It is used with Austin Air HM405 Allergy Machine (Code B405), Austin Air HM450 HealthMate Plus Air Purifier (Code B450) and Austin Air HM400 HealthMate Air Purifier (Code B400).