humidity depends on where you re living as well. being in the west like Manitoba, Sask, Alberta and parts of BC. in a drier climate you wont have to worry about the larger scale dampness due to the dry so yes a 30-50% is normal. In the east where I live the humidity sucks Ass. Winters are wet and cold and I run a heat pump to offset the dampness. Here its easily to get in the70-80% and when your house is sealed its easy to get out the older homes tend to have humidity problems from the older home of it soaking in pretty much lol.
HRV's work but expensive
AC works great but sucks in the winter
a bath room leaving on in a house does wonders as well
humidex machine does as well as a bathroom fan but can be hooked u in the basement to draw the humid air out.
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180 starfire front, LPS, millipora
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