The Energy Star qualified Motion Sensing ventilation fan provides automatic ventilation when the room is occupied. The integrated motion sensor detects when the room is occupied and turns the fan on. Once the room is vacated, the fan continues to run for a preset amount of time to make sure proper ventilation has occurred. The Motion Sensing ventilation fan operates at a barely audible sound level, is cost effective, and energy efficient. The series features a low profile grill that almost disappears into the ceiling and a motor with a large, quiet, centrifugal blower wheel that assures proper ventilation with almost no sound.