Closed loop vacuum cleaner

A vacuum cleaner which includes a closed loop air system is disclosed. The closed loop air system has an entering chamber, a fan in communication with the chamber, an electrical motor which drives the fan, a filtering unit connected to the entering chamber via a hose, an air jet nozzle located adjacent the chamber, and a hose connecting the nozzle to the filtering unit. Air laden with dirt and debris is picked up from the surface being cleaned and is sucked into the chamber via the fan. The air is directed to the filtering unit where it removes the dirt and debris. The cleaned air is returned to the nozzle. The air stream is again polluted by dirt and dust and is immediately sucked into the cleaner by the fan into the entering chamber. In a further embodiment, an additional fan or blower is employed to increase the air pressure at the nozzle.