Features Heavy galvanized steel box framing riveted together for durability. Six stainless steel blades with unique design capable of moving air in exhaust or intake mode. Cross shaped steel framework has a streamlined design with the fan hub at the center. With the fan blades on one side and the pulley on the other side this design allows improved load balancing which increases bearing and fan life. Center hub made from die cast aluminum with integrated steel shaft.
Shaft is supported by two rigid radial ball bearings with watertight protective screens.
Efficient sealed motors in compliance with CEI standards. All models with shutters come with our patented automatic shutter opener. This opener system allows the shutters to open as soon as the fan starts to turn. Loss of air delivery caused by air pressure needed to hold shutters open is eliminated giving maximum exhaust air flow. Backed by VAL s unsurpassed reputation for quality and service.