AstroPure portable air filtration system increases air-recirculation rates within a given space, effectively cleaning the air every time it passes through the 2-stage advanced filtration system. The system uses a high-capacity MERV 11 pre-filter and a dual-layer eFRM media HEPA filter. The stand-alone unit is simply plugged in and doesn't require installation. It is equipped with advanced sensor technology and a programmable HMI.