A fan assembly including a pedestal supported and upwardly extending body. A control adjustable electric motor is secured to an upper end of the body. A fan subassembly includes a peripheral and depth defining shroud communicating a rear grate with a front grate. A plurality of rotatable fan blades are operated by the motor and extend from a hub rotatably supported within the shroud between the front and rear grates such that a rear induced vacuum results from rotation of the fan blades. A filter and associated bracketry secures the filter in communication with the rear grate in order to filter contaminants attracted via the induced vacuum forces to the rear of the fan during operation.