A simple thermostat to control the vent fan can be an important step in improving your ventilation system. Our Dutch-made, UL listed thermostat, the TH15AG, comes with a piggyback plug on an 8' power cord. It has a responsive, side-mounted (316 stainless steel) sensing coil and a calibration dial that can be adjusted if necessary. This unit controls cooling equipment, such as vent fans or air conditioners. It can also be easily changed to control heating equipment.