i do have it up and running and its holding temp, i have a fan at the top sucking air and blowing it down the back past the heater and out of the gap at the bottom. Q1: should the air be going the other way? .. .. at the minuet i have no air holes from the out side to the in side. Q2: how many holes what size and do i need them at the top and bottom? the carboard will be replaced with clear plastic any help any at all i will really appreciate. humidity is high as just testing it.