The size of the sauna heater you need depends on the volume of the room and how well insulated it is. As a general rule, you’ll need roughly 1kw of heating power for every 4-5 cubic metres of properly-insulated space. For example, a sauna that is 2000mm x 2000mm x 2200mm (and is well insulated) would require a 6-8kw heater.  To make sure you’re getting the right size sauna heater for your sauna, get in touch and let us know the dimensions of the space you’re working with, and we can recommend the ideal heater size.