Air distribution pipes for ecological greenhouses Air distribution pipes have been widely used in ecological greenhouses. Our country is a big agricultural country, but the use of land is in progress, agricultural greenhouses are booming, and air distribution pipes should also have development opportunities. Since the ecological greenhouses are all steel frame structures, the material of the air distribution pipes is light and has no effect on the load-bearing. The air distribution is uniform, which is to provide a good production environment for the mushroom production inside.