YSK that using the bathroom exhaust fan to clear the steam in your bathroom after a hot shower wastes a lot of precious heat and humidity that most cold area homes desperately need in the winter. Consider cracking the bathroom door to let the steam into your house instead.
from /r/YouShouldKnow
YSK認爲，在洗完熱水澡後，使用浴室排氣扇來清除浴室裏的蒸汽，浪費了大量寶貴的熱量和溼度，而這正是大多數寒冷地區家庭在冬季急需的。可以考慮將浴室的門敲碎，讓蒸汽進入屋內代替。