How to Choose Sauna Heater

1

STEP 1

Calculate volume of your sauna room by multiplying it's width, length and height.

For example, sauna room [W]1.5 x [L]2 x [H]2.1m would have a total room volume - 6.3 cubic meters

2

STEP 2

Always choose the heater size 2-3 cubic meters below of the specified maximum room volume.

For example, sauna room [W]1.5 x [L]2 x [H]2.1m with a total room volume of 6.3 cubic meters would work the best with 6 or 8 kW heater.

Note: That is if the walls and ceiling are covered with panels and insulation behind the panels are adequate.

3

STEP 3

You need to allow for uninsulated materials used in your sauna such as glass door or window.

Non-insulated walls (brick, glass block, glass, concrete, tile, etc.) increase the need for heater output. Always add 1,2 m3 on top to the volume of the sauna for each non-insulated wall square meter.

For example, sauna room [W]1.5 x [L]2 x [H]2.1m with a total room volume of 6.3 cubic meters with glass door taking up 0.8 square meters, the following calculations must be made:

  • Total room volume is 6.3 cubic meters
  • Total uninsulated glass used for the door is 0.8 sq. m. multiplied by 1.2 would be equal to extra 0.96 cubic meters to be added to the total volume
  • Therefore the total volume of the room with the glass door is now 7.26 cubic meters and recommended heater size would be 8kW.

Note: Sauna heater with separate controls come with external thermostat and works more efficiently since it measures temperature from the room where heater with built-in controls has built-in thermostat and measures temperature inside the unit (and as a result of the safety, unit switches off more often).