DESC: Hunter's Quietflo Hepa Air Purifier 30245 is designed large sized rooms. Along with a True HEPA air filter that captures 99.97% of all airborne particles as small as 0.3 microns, it also has an advanced activated carbon pre-filter that reduces cooking, tobacco and per odors. It's airflow design exhausts clean purified air back into the room from the top of the unit to avoid stirring up settled particles. Digital LED controls, LED Filter Change Indicator.