I would like to connect a sauna heater (Harvia 8kW, three phase) with Home Assistant or another Smart Home system. While I will take care of the Home Assistant itself, I don't quite know how to talk to an electrician about the installation. What is the easiest and safest electrical device to control the sauna cooker? How do I solve the communication of the device with the Home Assistant? The sauna is in a holiday home and can be run several times a day, depending on occupancy.
