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Originally Posted by xaMdaM  You better put some ventilation in there as well. Even if it's passive convection. It's pretty easy to make a small room like this air tight... which you really should... and you can run out of usable air in just a few minutes of singing. Carbon monoxide poisoning happens a LOT faster than you think... PUT VENTILATION IN THERE! |
Um... human beings exhale carbon dioxide not monoxide... therefore you aren't going to die of any poisoning by not having ventilation in your iso-booth. the only thing that you'll notice is its going to be like a sauna in there and you'll find it hard to breath after a while... you just need to open the door every once in a while. i use my cold cellar as an iso-booth. the only downfall is windy days (blowing sounds coming through the vent hole from outside) but other than that it works great, stays ventilated and stays cool.