Also can use livestock rated fans (they are built to handle livestock dust) in the wall/windows. Or roof vents so the hot air can rise and easily escape. There are turbine type vents for the roof, where .the hot air causes the turbine to spin to draw out hot air. There are motorized ones as well -they constantly draw up and out the hot air.Come summertime I will add 2 lower base ventilation for cross breeze.