Product Detail Perfectly suited control gaseous contaminants in residential, commercial or medical environments Controls ammonia, amines, ammonia-based odors and particulates Advanced controls: remote control, automatic timer, displays filters useful life, air quality 3 Stages of Filtration, Pre & post filters; pre-filter is 99.7% efficient to 0.3 microns 1 gas filter (4 extruded impregnated activated carbon cartridges, more gas phase media ~12 lbs) . The "IQAir Gas Control AM Air Purifier" is best product for you. We recommended IQAir Gas Control AM Air Purifier