Difficult natural situations in deserts inside Iran have lead people to use their creativity and innovation to take the most advantage of natural factors and conditions to control them. Being spread in all over the southern region in Khorasan Province especially in villages of Nehbandan , asbads of Nehbandan are a sample of these creativities. Nehbandan is an important region because 120-day winds of Sistan are expanded as far as the region. The most number of asbads are installed inside Khansharaf. The axis of these windmills is vertical in comparision to european windmills with horizental axis.
Two parallel 10 meters hight walls with 4 meters distance build the main building of the windmill.