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Intake Exhaust Shutters Aluminum shutters can be used as a free air exhaust system or automate with a motor kit and controller.• Aluminum Powered Intake Shutters or free air exhaust • Nylons bearings; solid shafts; drawn cup type sleeves on all movable linkage • Frame of heavy aluminum extrusions with 1 2" channel lock water stop and precision millered corners • Interlocking blades for maximum weather seal • Double panel units constructed with rigid "T" section center member Manufacturer: J D Manufaacturing |