Quote Originally Posted by sinkov View Post
Is it too obvious to suggest that if a same recirculating air system in a confined space can damage your health, or even lead to your death, then do not, under any circumstances, place yourself in said confined space.
I guess if people are selfish enough not to give up something ( that they probably don't eat anyway) for a few hours, then yes, you might as well lock yourself away.
Fortunately most people are not like that, and are understanding of others needs