For maximum control over ventilation there is the Split curtain system. It allows you to open the top curtain in the colder weather and both curtains in the hot weather for maximum ventilation.
features
Combination of Roll-Over curtain system on top and a Roll-Up curtain system on the bottom
Allows for best ventilation in winter and in the summer
Well suited for large openings of up to 12’ and 200’ in length
Manual and automatic operation options
Wind support available in either wind pipe or wind rope