Big Ass Fans’AirEye directional fan detects motion and shuts off automatically. Featuring an occupancy sensor and an advanced motor, AirEye is quiet, long-lasting, easy-to-clean and efficient, according to the company. AirEye only runs when workers are present, saving energy effortlessly during shift changes, breaks and shutdowns. The standard infinite speed control allows the fan to operate at 1 to 100 percent of full speed, rather than the typical two to three settings. The AirEye is available in 20", 24" and 30" diameters with a variety of mounts including I-beam, C-channel, wall, swivel and portable pedestal. This fan comes with a seven-year full warranty.