The Meitav-tec FCC_01 Free Cooling Controller is a wall mount thermostat that saves energy by taking advantage of cooler outdoor air temperatures. It has an open/auto/close switch to control a damper, fan, or window. Sensors monitor indoor and outdoor temperatures, and it will open the damper or window when outside air is cooler than inside by the default 1°C difference. Accessories include indoor and outdoor temperature sensors and a decorative back plate.