... Programmable Heating Thermostat509 series, large LCD digital thermostat, 110/220VAC±10%,16A thermostat for hot water radiant heating systems and ... -lit display, LCD Screen, easy-to-see and readInfrared remote-controlled function(option)Built-in interrupterTwo work mode switchover: ... temperature of every corner is different by convection. The thermostat can be adjusted the valve range from -8°C ...