Ventilation inhouse is very important, not only for the air exchange of your plants, but you need less energy to heat up dry air then you do wet.
Every morning we open all windows in the house for half an hour or so, in the boys rooms maybe one hour
Those smelly monkeys!!!
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Btw, I've been busy all night trying to set some sort of timer on my fan... 2min on, 10min off seems to be working at the moment. I'll have to let it run for a couple of cycles, but I might get lucky and have a temporary solution until all the parts arrive to cycle the fan based on the humidity.
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