This TPI Corporation three-speed exhaust fan can be installed from inside the wall. No need for external framing and shutter. TPI Corporation produces innovative, industry-leading products for electric heating, fan, and ventilation markets. Anything you need in the industrial, commercial, or residential use. Industrial shutter-mounted exhaust fan is a great solution to get airflow. Features three-speed control. Dimensions: 14"H x 17. 13"W x 7. 18"D. Fan is fixed to the frame for a more stable design. Comes Motor features: 1/8 HP, 120V, one-phase, sleeve bearing, totally enclosed, permanently lubricated. Speed: 2100 CFM (high), 1900 CFM (medium), 1700 CFM (low). Switch type: pull chain. Eliminates need for external framing and shutter. No cord, junction box is provided for direct wiring. Can be installed from inside the wall. Meets or exceeds OSHA standard. 1-year manufacturer limited warranty. ⚠ WARNING: This product can expose you to chemicals including nickel which is known to the State of California to cause cancer, and chromium, which is known to the State of California to cause birth defects and/or reproductive harm.