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The diverse intake louver selection from Grainger offers numerous options. Fixed intake modular units can fit together seamlessly to create custom openings. Choose from galvannealed steel, aluminum and drainable aluminum frames. Fixed height adjustable width intake louvers feature tabbed louvers that can lock securely into the frame, helping to provide a smooth finish and clean appearance. Choose a G-90 galvanized steel frame or 0.040" aluminum for extra corrosion resistance in problem environments. The manually operated combination louver damper features a mill finish, extruded aluminum, drainable frame and 45° fixed louvers. Choose from six sizes. Shop Grainger today for a wide range of intake louver options to help provide successful building ventilation.