The Harvia Fenix FX45-U1-U3-XC is a modern sauna control unit with Wi-Fi capabilities, allowing users to easily manage their sauna experience from a smartphone or tablet. It features an intuitive touch screen interface, enabling precise control of temperature, lighting, and operating time. The Harvia Fenix FX45-U1-U3-XC is a modern sauna control unit with Wi-Fi capabilities, allowing users to easily manage their sauna experience from a smartphone or tablet. It features an intuitive touch screen interface, enabling precise control of temperature, lighting, and operating time. With its sleek design and seamless connectivity, the Fenix FX45-U1-U3-XC offers convenience and flexibility for an enhanced sauna experience. 

The Harvia AC3020 Olivine Diabase sauna stones are a subvolcanic rock mined in Western Finland and designed for use with Harvia sauna heaters and stoves. 

Genuine Harvia sauna stones are selected according to old traditions and convey a genuine sauna atmosphere. Harvia sauna stones provide good and soft heat. Split-face sauna stones are the only correct stones for electric heaters and woodburning stoves because they can store lots of heat and the water evaporates efficiently from the wide surface of the fracture. Angular split-face stones also allow for loose placement of the stones, which is the most important requirement, particularly in electric heaters in order to make it possible for the heat to be conveyed to the sauna room between the hot stones and heating elements. Good air circulation in the stone space makes the electric heating elements last for as long as possible.

The AC3020 stones work for the following Harvia Sauna Heaters-

• Virta Series
• AF (Forte) Series
• M Series
• Pro Series
• Legend Series

CAUTION: Light (ceramic), soft (soapstone), and smooth (rounded) sauna stones do not produce the desired results and they may cause problems in electric heaters in particular.