Greenheck Model APD Direct-Drive Plenum Fan
Model APD is a direct-drive plenum fan with the wheel connected to the motor shaft. With no fan-shaft bearings or belts to maintain, Model APD eliminates the cost and maintenance associated with traditional belt-drive plenum fans. With a compact size that makes installation easy, Model APD is ideal for array applications in air-handler retrofits or pressurizing a plenum room. When Model APD is combined with a variable-frequency drive, air volumes easily can be matched to changing building requirements or overcome increased pressures from dirty filters.