Narvi Ultra Big -sauna heaters are efficient in heating up bigger saunas, which are heated daily. Due to the large stone compartment, the Ultra Big-sauna heater gives excellent steam for the sauna goers. The sauna heater parts are made of quality steel to stand heavy usage and corrosion. The effect of Narvi Ultra Bifg is 18-33kW.

The functions of the sauna heater are controlled by a separate control panel and power unit (bought separately). The heater  requires an external temperature sensor (included in the separately bought control unit), which makes sure that the desired temperature remains accurate in the sauna.

The diameter of a heating element of electrical heaters made by NARVI Oy is exceptionally big (8.5 mm). This extends the usage life of a heating element and significantly reduces the risk of overheating.

                                                             Ultra Big 18 kW                    Ultra Big 24 kW                  Ultra Big 30 kW                       Ultra Big 33 kW

Sauna room size	18–30 m³	27–40 m³	40–56 m³	46–66 m³
Effect	18 kW	24 kW	30 kW	33 kW
Dimensions
Height	68 cm	68 cm	68 cm	68 cm
Width	86 cm	86 cm	86 cm	86 cm
Depth	49 cm	49 cm	49 cm	49 cm
Product weight	50 kg	50 kg	50 kg	50 kg
Stone capacity	120 kg	120 kg	120 kg	120 kg
Casing	stainless steel	stainless steel	stainless steel	stainless steel
Safety distances
Sides	16 cm	16 cm	20 cm	20 cm
Front	20 cm	20 cm	20 cm	20 cm
Up	140 cm	140 cm	150 cm	150 cm