Healthmate Regular Replacement Filter Austin Air HM400Only use original Austin Air replacement filters to keep your Healthmate air cleaner working perfectly for many years to come. Each replacement filter comes with the main filter and one matching prefilter. White replacement filter fits the Sandstone, White, and Silver Healthmate Regular air cleaners. The black replacement filter fits the Black and Midnight Blue HM400 air cleaners. Easy to change. Takes about 10 minutes. Step 1 Open the box the new