Abstract: An air filtration system may monitor and control air quality within a building with the use of multiple housings strategically placed throughout the building. Each housing includes a motor driving a fan and an air filter. Selective activation of a cleaning mode removes particulates from the filter within each housing, cleaning only the air filter within the housing that requires cleaning. Air filter cleaning time and power consumed for cleaning is thereby reduced. Also, filtration is improved by locating a filter and a motor at key locations.