KAZE APPLIANCE SE90TM Modern Dual Speed Bathroom Exhaust Fan with Motion Sensor and Delay Off Timer, 90 CFM, 0.3 Sones Please note the size of the housing is 11 3/8" x 10 1/2", resizing your existing ceiling opening will be needed if your current fan housing is smaller KAZE APPLIANCE Ultra Quiet Series. Barely audible sound level of less than 0.3-Sones at 90-CFM. Designed to start running at adjustable preset low speed upon powering on to meet continuous ventilation requirement When motion is detected, fan boosts up to 90-cfm for an adjustable preset duration (3 to 30 min) and under grille led indicator light on Includes double hanger mounting bars. Both 4 & 6 inch duct adapter. Housing dimension: 11 3/8 by 10 1/2 by 7 5/8 inch. Grille measures 13 by 14 inch Energy star qualified for efficient cost-saving operation. Etl-cetl,hvi. Three year manufacturer parts warranty