He's got a heat problem. Exhausting from the bottom is a waste if you are trying to remove hot air. Yes, you can keep it hot by exhausting from the bottom.
While that is true in the broader sense, it is ALWAYS preferable to pull air because of its elastic nature. Ignore that at your own peril. It WILL fuck your grow to either push air or exhaust from the bottom.
You have been warned.
" LOL It might seems funny but Im really serious on the matter. The probability to get my project a success with your help is higher than gambling, trading or searching for gold."
Because those are the only alternatives. Oy. Learn how to grow before you try to make a killing at it in my...