Harvia Topclass is a user-friendly heater. The stone space is made of stainless steel. The illuminated control panel is placed on the side of the heater towards the top section, which makes it easy to access the switches even in the dim lighting of a sauna room. The heater is easy to mount on a separate mounting rack, and the control panel can be mounted either on the right side or the left side of the heater as appropriate. The outer casing of the heater is made of stainless steel.