Venting with a bathroom fan will work as long as the humidity level outside is lower than the humidity in your house. Being in Edmonton this is probably your case, but for those of us in more humid locals this simple fix can actually make matters worse. For example, here humidity outside right now is 86%. If I ran a bathroom fan 24/7, I would be exchanging humid indoor air with outdoor air that is even more humid, not a good trade.
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