Electronic clock thermostat for electric towel heaters based on fluid heat transfer. The temperature is controlled by means of an external sensor. The SMART series has the heating element attached to the thermostat. The symmetry of the device enables both right and left side coupling to the towel heater. The device is supplied with a dedicated remote control that can be used for defining a weekly program configurable for each day of the week. The remote control is provided with a bracket for anchoring to a wall or to the towel heater. The ECO operational mode reduces the selected temperature of 3°C, allowing a reduction of the energy consumption. The upper LED indicates the status of the device while the lower LED indicates the active operational mode. The open window detection mode allows reducing energy dispersion with consequent cost saving.