sizing a sauna heater
Sizing a Sauna Heater
As a general rule of thumb a sauna heater needs 1 Kw to heat 50 cubic foot of room space. This is a general rule and an outdoor sauna or a sauna built on outside walls may need to have the heater over sized.
As an example a 6'x7'x7' sauna room should require a 5 Kw heater. (252 cubic feet divide by 50 = 5.04).
Because a sauna is heating air, you will find most sauna minimize the ceiling height. A 6-7 ceiling is almost always standard. Never build a sauna in an 8 foot room as a good portion of the heat will be at the ceiling where it is not used.
Sauna heaters turn off once the desired room temperature is met. This means that a larger heater simply works less than a smaller heater so there is virtually no energy savings by purchasing an under sized sauna heater. If indoubt always go up a size.