Light and ventilation skate is designed to create natural ventilation in livestock buildings. Used polycarbonate let the sunlight in and promotes natural lighting. Side veratrate create the conditions for effective exhaust ventilation of premises in any weather and any wind direction. Used as metal aluminium guarantees a long service life of lamp in extremely adverse conditions (high ammonia concentration, high humidity, extremes of temperature). Adapted design of the vertical struts corresponds to the snow loads on all territory of Russia. To regulate the amount of air the horse is equipped with a valve of manual or automatic adjustment. The thickness of sotapanna 10mm. Standard sizes from 32 cm to 250 cm The standard sizes upon request. Advantages: Good exhaust effect. A lot of natural light free. Feed at the feed fence remain dry and fresh. Heat retention in cold barns in the winter.