well, i have a box in a closet. with a 400w and a 250 w, i made DIy cool tubes for both venting to the attic, with a 6 in duckt fan on the cool tubes, as well a 6 in bathroom vent fan 70 cfm, i think .. mayb more ... which is venting in the attic as well .. also i have a 6 in intake fan on the...