the diy carbon scrubber is basically a cone air filter like so.....packed with activated charcoal from your local pet store......place a stocking over the hole and attach to the end of your exaust vent after the fan or blower....and yes with some hard work..proper planing and research you can control the smell.....you have to start with making sure that your box is light and air proof...then you use fans and blowers to direct the air in and out of your box and blow where you want it to.....

__________________
my half assed grow journalshttp://www.rollitup.org/grow-room-de...oom-build.html

think about that one bro... if the wife finds out she wont be happy... dog house for sure.... lol im all about the garden.. but so is my wife... u know what i mean?

once you get the exhaust mounted to the carbon filter especially if you are ducting through the top of your space your temp issues will drastically decrease. Pulling all that warm air out and filtering in fresh cool air will ensure that your room stays at a modest temp. What size lights are you planning on using? Also I remember something about you doing this in an attic. If you have some way to get an active intake of fresh air through a window or hole in the wall somewhere all that extra co2 from the great outdoors will really increase your yield and speed things up a bit.