Dehumidifier in a basement
I have frequently heard mold forms in basements at 65% humidity, hence a dehumidifier should be set at 65 or 60%
I have an unfinished basement with 1/3 crawlspace and openings to outside that i cannot seal at this time. I am in climate zone 6 iirc near Toronto Ontario, we get hot humid summers and cold dry winters.
While i was looking up something for dew point i came across this website
And at 10ºC it suggests mold risk comes at 80% humidity.
How accurate is the 80%?
I have an IR temp reader that reads the floor at ~20ºC and the basement ceiling at ~24ºC, assuming the mean air temp is 20ºC the calculator recommends a max if 68% humidity, is this accurate and should i assume the temp is above the 10ºC rule of thumb below ground for dehumidifier setting purposes?