1. Wind catcher, for summer ventilation
and common wind catching techniques used in Iranian architecture
"Why put a fan to catch the wind at ground level, where the wind speed is lowest, rather than 3 metres or more in the air? The extra speed of the wind would soon repay the work of putting-up the supporting structure. Why mount a heavy millstone and its supply of grain on a supporting structure, when it could rest on the ground beneath?As it happens, although the sources assumed that such a primitive device no longer exists Iranians continue to catch the wind to cool their houses through ingenious structures on top of their houses that can be traced back almost 2000 years. One can easily imagine such a structure adapted for a simple wind-driven mill." - Image 1 and 2 and passage from http://www.ullesthorpewindmill.org.uk/index.php?act=viewDoc&docId=7