These 2 Areas Are More Life Threatening.
I'll start this article with something I saw on an episode of Holmes On Homes, last year where the host of the program exposed a dryer venting into the garage ceiling which was sealed and was over the garage. Imagine 6 - 7 years of dryer exhaust(lint) collecting in the floor joist? In other words, it was not exhausting to the outdoors at all. I'm not saying this to alarm you, but to attend to different smells in your home that may be more serious.