Powered by compressed air, the Guardair Venturi System is simple, efficient, and dependable. Compressed air enters the air inlet (A), is piped through the venturi box (B) to the air injector (C), where it is introduced at high speed into the venturi (D), then exits through the exhaust silencer (E). As the compressed air expands within the venturi, a low-pressure zone (F) is induced, which draws air through the filter (G). Surrounded by the drum (H) with a vacuum inlet (I), outside air is drawn into the vacuum inlet via the vacuum hose (J).

By utilizing the powerful venturi effect, the result is up to five times more vacuum lift than conventional electric-powered vacuums. With no motor or moving parts, Nortech vacuums offer years of trouble-free operation.