Root!t Electric Thermostat (for Root!t Heat Mat)Root! t Electric Thermostat (for Root! t Heat Mat) Root! ts Electric Thermostat is used to control the output of your (separately available) heat mat based around temperature information gathered by its probe, helping to maintain a consistent environment for cuttings and young plants. How the Root! t Electric Thermostat Works: Heat mats are generally used under propagators to help ensure that temperatures do not drop below certain levels during young