Harvia Xenio CX30C Combi Sauna Control (CX30C-U1)

A combi heater like the Harvia Virta Combi has a built-in steamer, so it needs a control that handles humidity as well as heat. The Xenio CX30C switches the heater and the steamer independently, holds the temperature you set (40–90 °C) along with a target humidity, and can delay the start by up to 12 hours. It also switches sauna lights and a fan.

The kit has four parts: the Xenio control panel, a power unit that switches the heater, a temperature sensor with a resettable overheat protector, and a humidity sensor. Because the power unit is the contactor, no separate box is needed. Harvia rates this 240 V single-phase version at 12.7 kW, fed through two supply wires to the heater. Mount the power unit outside the hot room, somewhere dry.

We match it to the Harvia Virta Combi 9 and 10.5 kW. This is the standard version without Wi-Fi; Harvia makes a Xenio Wi-Fi panel that can replace the standard panel later, and we can quote it on request.

In Ontario, control and heater wiring is a job for a Licensed Electrical Contractor, or for you in your own home after filing an ESA notification (permit).