Environmental controllers are more efficient than thermostats alone and allow you to automate climate control in your greenhouse or grow room. Some controllers are very simple systems that offer basic functions like timers to turn ventilation or lighting on and off on a schedule. More advanced systems offer more features such as digital alarms, sensors, and more complex scheduling controls. Some controllers have become so advanced that they even utilize computer learning technology. In addition to reducing manual labor, using environmental controllers offer additional benefits of energy savings and providing a stable cultivation environment where plants will not be stressed by fluctuating conditions.