“Bedroom Machine » Austin For those who desire a better nights sleep This Is the most advanced filtering system that Austin has ever designed. It has been built to nest the requirements set cut by the Johns Hopkins University Medical School for ongoing studies where this new filtering system must captures gasses and particles at the anon size level. 402 STAGE 1 Large Particle Pr-filter FAN/MOTOR ASSEMBLY DIRECTIONAL AIR FLOW + Removes particles easily seen by the naked eye ; in Ire li I. (e.g.