>>510517606
its a stupid image, actually you would do it like shown here >>510516920
but some actually do cut a hole into the glass and fix the exhaust there
also you can do a coredrilling and actually make a hole into the wall for the exhaust

also another option is like on picrel but most windows here are not build that way

>>510517659
this only happens when you use it the wrong way, without a cover
single women tend do do this and then think the product is shit, lol
t. installed these for some short time and use one myself as i am convinced its the best product