The Aerospeed 20 inch circulator tilt fan model AC100 is poorly designed and constructed of inferior plastic and is dangerous to homes with children. I had this fan on a table top to draw air through the window of my apartment and a slight breeze blew it over causing the blade guard to easily pop off the fan blade hit the table top shearing off a blade which flew into the room. This could cause serious injury to people especially children if the blade guard comes off that easily which would expose the rotating fan to a child's fingers.