If yo dont have good scrubbing of the room or are not scrubbing the exhaust. There is a big chance the smell will get through your window or Portable AC unit. Mine is a single hose. I already Knew of this danger when I was setting up my room. So when I bought my scrubbers I got more then what I needed to keep the smells under control.. This to me is one one you dont want to skimp on.. Most of the larger grows I have seen scrub there rooms like this(recycle the air). I read that colling your lights using hoods causes a loss of 3% I forgot where I read that.. Cooling the room is more efficient and no loss..
This has nothing to do with getting 1gpw.
This has nothing to do with getting 1gpw.