Greetings all, long time reader, first time poster. I would like to comment on how impressed i am with the site, people and grows but dont want to sound all gushy and ass-kissy. Did I mention how impressed I am with this site, the helpful people and the awesome grows? Anyway, I would appreciate some direction regarding ventilation, here is where i'm at. Building insulated 8x8x8 "box". Using window ac for temp control but am getting stuck on best way to balance conserving cooled air vs. fresh air exchange. I am considering an inline fan with carbon filter that sucks from room and vents back into it providing air movement and reusing cool air, a spring type damper to balance pressure (if needed), and passive air intake as needed or CO2 sup. Initially the space will be under-utilized and not crowded so hopefully it wont get too stale. Please show me the error of my ways or the holes in my reasoning before its too late. BTW starting with CFL and blackstar 240 and diesel ryder regulars in soil with TLO style.