Bedroom Machine Replacement Filter Austin AirOnly use original Austin Air replacement filters to keep your Bedroom Machine 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 Bedroom Machine air cleaners. Black replacement filter fits the Black and Midnight Blue Bedroom Machine air cleaners. Easy to change. Takes about 10 minutes. Step 1 Open the box the