The Titan Kronus 1 controls temperature and humidity in your grow area at your preferred settings. The Kronus 1 activates an exhaust fan, AC unit, or dehumidifier if the temperature or humidity exceeds the preferred setting. Plug in your exhaust fan into the "exhaust fan output" to control your temperature, and plug a dehumidifier into the "dehumidify output" to keep your humidity in check. Comes complete with 25' modular remote temp and humidity sensor.