Thermolec Split|Steam - Manual (Page 6)

Page 4
4. How to Control the Humidity
4.1 Humidity level and comfort are personal matters but it is generally acknowledged that a Relative
Humidity of 35-40% is desirable. However, you should take the outside temperature into consideration
before setting the humidity level in order to avoid condensation on the windows. Usually, a narrow strip of
condensation around or at the bottom of the window is considered as normal.
4.2 If you installed an ACU-STEAM humidistat and an outdoor sensor, this adjustment will be done
automatically. The outdoor sensor reduces the setting of the humidistat according to the outdoor temperature
during cold days without having to set the humidistat knob manually.
It does the opposite during mild days. Please see Fig. 4b for the percentage of relative humidity on
the electronic humidistat label. The middle of the scale corresponds to the middle of the comfort zone,
approximately 35% RH (Relative Humidity).
4.3 If you are using a mechanical or other humidistat, the adjustment according to the outside temperature
will have to be done manually. For your information, the following table shows the recommended setting of the
humidistat according to the outside temperature. Please see Fig. 4a.
.
4.4 No matter which humidifi cation system you are using, please do not forget that the humidity level
cannot adjust quickly. It may take some time to build up the humidity to your comfort level. Depending on the
dryness of the house, carpets, furniture, drapes and wood will absorb moisture before you can feel the change.
4.5 If the house remains unoccupied during the winter season, set the humidistat to the minimum set point
in order to prevent condensation.
NOTE: The best location for the humidistat is at least two feet away from the faceplate and at a level that is
lower than the bottom of the faceplate.
Fig. 4b
!
35
30
20
40
50
Outside Temprature Recommended Setting
-22ºF (-30ºC) 15%
-13ºF (-25ºC) 20%
-4ºF (-20ºC) 25%
+5ºF (-15ºC) 30%
+14ºF (-10ºC) 35%
above
23ºF
(-5ºC) 40%
Fig. 4a
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