Humidex - it works

[Biotech]

Untamed: All I have to do is to leave an upstair window opened a little bit (an inch or so) to keep a good air circulation. The humidity of the house has been kept at 40% all these months since the Nov installation.
As for the furnance, the installation guy said it depends on the type of furnance you have - the one we got, we do not have to worry about it.

Psyire: Initially I planned to install one too, but Humidex installation guy told me that I do not really have to if I can keep one of the windows open ... and he is right.