DESC: The AllerAir 5000 Exec Air Purifier has a 1500 square foot coverage area and acts to eliminate large and microscopic particles, gases, odors and anti-microbial. The filter compound is anti-microbial, HEPA, MAC-B mass activated carbon filter and the 5000 Exec offers multi-stage filtration. With a CFM (cubic feet per minute) rate of 400, the AllerAir 5000 Exec Air Purifier is a floor model. The AllerAir 5000 Exec Air Purifier features 2 air changes per hour, a cleanable prefilter and an anti-microbial filter for disease carrying micro-bacteria. The MAC-B filter provides military-strength protection.