Thank God she was rescued & hope that family took measures to put some type of lock on that access door so it doesn't happen again. Can you imagine if they didn't even see her go in there, and she never bothered to bark or cry? They would have thought she ran away instead.
I had a cat crawl in my heat duct in the summer I had to take a part of the duct apart when I retrieved him he was all dust it was funny some kittens can course trouble 😅