Austin Air Replacement Filter for the HealthMate 400 from Review July 12, 2018 No Comments Replacement filter for the . Nearly 15 lbs mixture of solid activated carbon and zeolite. Meets HEPA standards, trapping 99.97% of all particulates larger than 0.3 microns. Filter Guarantee: 5 year pro-rated guarantee under normal residential use. Tags: Austin Air, Cooling & Air Quality, Heating, Home & Kitchen, Parts & Accessories