The smart thermostat for electric heating is designed to control a heating system such as:
It is possible to add an expansion module to your thermostat to control a floor heating system exceeding 15 A or even add an auxiliary heating system for greater comfort.
If you add an auxiliary heating system, make sure that the added powers of all your heaters do not exceed the maximum load of the thermostat.
1800 W @ 120 V / 15 A
3120 W @ 208 V / 15 A
3600 W @ 240 V / 15 A