Find all the Austin Air Filters, for the Standard sized filter kits you need here! These filters are all interchangeable in any HM400 model, unless your unit was purchased prior to the year 2000. If your unit was made in the 1990's, you must use the FR405 HEGA (Austin Air Allergy Machine Filter) as the others will not fit.
Any units made after the year 2000 you customize your air purification needs with any of these interchangeable filters from a leader in the air purifier industry.
AllAustin Air replacement filters units available in USA lower 48 states.
OnlyAustin Healthmate, Austin Healthmate Plus and Austin Bedroom machine replacement filters available in Canada.