ok im setting up a grow tent in my closet. im building one with 2by4s and mylar. im making it into 2 sections the bottom one 2ft by 3ft and 2' 6" tall. and the top one is 2ft by 3ft, 4' 6" talll. i have a MOD fan(one of those 10$ fans u by at walmart) sucking air out the top. BUT HERES MY...