I was typing that while he was posting , so id have just said or what he did, nice setup rocket. But to vent the inner room isnt really possible without some sorta access/hole. can you put a roof exhause fan on it? like you have on a stove fan. maybe consider another room, as nice as the idea to have it all snuggled together, maybe its not practical. Ive made good use of very small spaces for my clone, mommy room and than moved em quickly into the lamp room as I call it.