The TC-HV-100 High-Voltage Thermostat from Cool Components is an automated thermostat that can turn fans on and off based on temperature. This is a perfect addition to your existing cooling setup, allowing you to more precisely maintain air temperature without requiring more work. Simply set the thermostat and let it do its work. This unit can also be used in conjunction with the temperature controller (which adjusts fan speed based on temperature) to gain even more precision and efficiency.