Filter
Top Products
Installation & Operation Instructions
4211-86-G 09-23-05
5
314 SKLH 20C
Rule of 200
90
100
110
120
130
140
150
160
170
180
190
10
20
3
0
4
0
5
0
6
0
70
80
90
1
0
0
% of Humidity
Temperature
F
TM
Sauna Temperature and Humidity Theory:
The worldwide trend in sauna bathing is “lower temperatures and higher humidity”—much like ancient
woodburning saunas. Old woodburning saunas (ancient “smoke saunas” or more recent saunas with
woodburning stoves) had massive amounts of rocks, heated by burning wood, which in turn created a soft
radiating heat, and very pleasant steam when water was sprinkled on the rocks. The Saunatonttu captures the
essence of those wonderful saunas of old.
A large rock mass is the essential feature to create lower temperature/higher humidity saunas. The Saunatonttu’s
combination of 200 pounds of rocks surrounded by high-tech super-insulation makes it possible. The large rock
mass, superheated with minimal energy, is ready for sauna with the simple opening of the lid. Soft heat and
wonderful steam are immediate.
This large rock mass concept is based on the “Rule of 200” (see Diagram 3) which illustrates how humidity and
temperature interact. The “Rule of 200” suggests: “To the typical sauna bather, a sauna is most comfortable
when the combination of degrees Fahrenheit plus Relative Humidity is 200 or less”.
Example: Room temperature is 145 F. 200 - 145 = 55
There could be up to 55% humidity in the room before it becomes uncomfortable for the user. If temperature
goes up the humidity level will need to come down to be comfortable for the user.
SECTION 6: THEORY of OPERATION CONT.
DIAGRAM 3