Greenhouse exhaust fan
My husband and I have just about finished our 12X12 greenhouse and I need to know how high to install the exhaust fan. The walls are 8 ft high, and the center pitch is around 10 ft high. Could the fan go in the 7-8 ft section or does it need to go as high as we can get it. Also, does it matter if it is on the South side (front) or the North side (back) blowing air out? Thanks for any help.