Note: Delivery only to Finland. The Tulikivi Sumu E sauna heater is an electronically controlled model especially suitable for saunas with glass or tile surfaces. Tulikivi’s Sumu E heater has a stylish and rounded form, beautiful details and high-quality materials. Sumu E can also be integrated into the sauna benches. The heater can be connected to a KNX building automation system with the KNX Sim Module.