The Broan Direct Discharge 180 CFM Utility Through-Wall Fan can be used in rooms up to 160 sq. ft. for effective ventilation. The 180 CFM fan helps improve airflow with a powerful 6-1/2 sones motor. The fan is designed with an integrated on/off rotary switch to prevent the need for wall switch wiring. Installation is easy when you combine the 8 in. through-wall design with walls 4-1/2 in. to 9-1/2 in. thick. Size: 19.6 In. Color: White.