The current of 6KW/220V is 27.3A, the circuit breaker must be selected at least greater than 33A, and it is recommended to choose 40A. It is also enough to choose a 10mm² wire.
I am considering this heater to convert an older sauna room. What does the installation kit include? Will I have to buy a separate connector like with a dryer?
This machine is an internal control furnace. There is a temperature and time control knob on the stove, which you can directly operate without the need for other connectors.