I like to have some type of ventilation, whether a fan or a window open. I don’t actually smell the paint while I’m painting. Or maybe I’m just used to it.
I can’t say that I’ve noticed a smell…but maybe like carbon monoxide, we don’t notice till it’s too late. I keep a fan on and like I said, a lot of times the fan and the patio door open just to feel like I’m doing what I can to be safe. Heating vinyl, I’m sure, gives off fumes of some kind, whether we smell it or not.