Austin Air Immunity Machine Filter The latest and most robust filter in the standard Austin Air lineup to date, the Austin Air Immunity Machine Filter is an impressive 8 layer filtration system! This filter is now the new standard in gold when it comes to versatile filters to handle particulates and difficult VOCs/Fumes/Odors. Check out the Brand New Austin Air Immunity Machine here! The kit is available in black or white so you can upgrade your current Healthmate unit to the new Austin Air Immunity Machine Filter at any time and match your current unit's color! New Immunity Machine units come with the black pre filter as default. This set comes with all filters needed for your Immunity Machine Unit. Fits the larger Standard size Austin Healthmate HM400 unit. This does not fit the smaller Jr size Healthmate HM200 units. The Austin Air Healthmate Filter Replacement part # and color selection is below (this is for aesthetics only) : Part# FR444A - For darker color units like Blue, Black, or Graphite machines order the Black filter pack option. Part# FR444B - For lighter color units like Sandstone, white, or silver order the white filter pack option
