Air Purifiers - Austin Air, Bedroom Machine, Sandstone : The Austin Air Bedroom Machine was designed with and is endorsed by the National Sleep Foundation as being the most advanced room air purifier Austin Air has ever made. This unit features a 5-stage filter with granular carbon and military grade carbon cloth for the most superior air cleaning of all. Ideal for those who have difficulty sleeping, suffer from COPD, allergy and asthma attacks at night as well as anyone looking to improve their overall health and wellbeing. So complete, this unit is certified to remove 99.97% of airborne particles 0.3 microns or larger in size and 95% of all particles down to 0.1 microns. In a John Hopkins study of local homes, the Bedroom Machine effectively reduced the levels of Nitrogen Dioxide (NO2), a gas particularly dangerous for those with COPD, by 27% in kitchens and 23% in bedrooms. This is the only air purifier constructed using solid steel and a non-toxic powder coated paint. No plastic, no polystyrene, no off gassing. Featuring an industry-leading filter that has a 5-year life, this air purifier comes in Sandstone. In another clinical trial at John Hopkins, it was proven that an Austin Air Bedroom Machine effectively removes indoor pollutants from the home, including nicotine. Cleaner air means better sleeping. The device reduces snoring, leading to sounder and deeper sleep with fewer interruptions. The 360-degree intake system draws air into all sides, passing it through a 5-stage filter and removing sub-micron particles. Leads to better health as the device filters chemicals, gases, viruses and bacteria, allowing immune systems to strengthen as coughing, wheezing and sneezing are reduced or eliminated. At 47 lbs., less than 2' tall and with included easy roll casters, this unit is portable and perfect for living rooms, dens or other large areas.