Eco Breeze&ndash; The first automatic fresh air cooling system designed for homes. Continuously monitors temperature and humidity- both outdoor and indoor. Determines when cooling is needed and uses free outside air ventilation whenever it is available. Patented microprocessor based technology automates the use of outside air for home cooling Set Eco Breeze thermostat below your AC thermostat to cool with crisp outdoor air and to exhaust hot stale indoor air. Set AC thermostat higher to save energy and only cool during the hot humid weather Easily installs in a window Dynamic humidity and temperature controls keep hot, humid air outdoors and bring cool dry air in for cooling and automatically change between AC (refrigeration cooling) and fresh air cooling Louvers close when not operating trapping cool air in the home and sealing out the hot daytime air