Thanks all for the replies
Big Al, nope, not trying to kill anyone, that's why I'm asking

I was told that in 3rd world countries that they are using them indoors. I realize they might have a big hole in the top of their hut but figured there might be a way to ventilate. I am not strong in the science area so I'm just trying to understand what is possible. Better to ask here amongst those who understand trying to find alternative ways to do it than to ask someone locally that I need help from! lol
Thanks again for the help
Theresa