7
If the sauna room walls have uninsulated surfaces (tiling, brick, glass brick, timber etc.), they should be warm before
having the sauna bath. Cold surfaces produce steam and significantly slow down heating of the sauna room.
To warm up any heat storing surfaces, keep the full power on and the lid open before taking a sauna bath. The heating
time depends on the surface area, the sauna room volume and the heater output. You'll find the heating time out in
practice, but as a reference, stone surfaces above the heater adsorb 1 kWh/m² and timber surfaces 0.5 kWh/m².
Example: If the sauna room has 3.0 m² of stone surface above the heater, just to heat up the stone surface with a 3.0 kW
heater takes one hour.
For proper use of the heater and the sauna and to enjoy the heat storing properties of the heater, all heat storing surfaces
600 mm and over above the floor should be insulated (Note: also timber walls).
Remember not to throw water on the stones straight from the water bucket, as the heater is capable of vaporizing great
quantities of water. A regular sauna ladle takes a suitable amount of water.
The volumes are calculated for sauna rooms with full thermal insulation, where the thickness of the frame and insulation
is 100mm.
Stone and glass surfaces add to the required power output. 1 square meter of stone or glass adds 1,5 cubic meters to the
volume.
Table Saunatonttu heaters / sauna room volume
Saunatonttu 3 4
6
8
Input
kW
2,0 3,4 3,4 4,8 6,4 8,0
Min volume m
3
Max volume m
3
3
6
4
8
4
8
5
11
7
14
9
17
Table Saunatonttu heaters' connection cables and fuses
Output
kW
Heater connection
cable H07RN-F/
60245 IEC 66
400V 3N~
Fuse
A
Heater connection
cable H07RN-F/
60245 IEC 66
400V 3N~
Fuse
A
2,0
3,4
3,4
4,8
6,4
8,0
4 x 1.5
5 x 1.5
5 x 1.5
5 x 2.5
2 x 10
3 x 10
3 x 10
3 x 16
3 x 1.5
3 x 2.5
1 x 10
1 x 25
