The new ventilation system, which is made by Abbi-Aerotech, is using air tubes. It is specially designed for calves, dairy and young goat farms to avoid any cold draught as well as to realize the optimum ventilation. The tubes have special designed openings which are different for each specific farm. Air tubes are available in different diameters and lengths, depending on the dimensions and design of the barn, the type and number of cattle and their weight. Specifications: Fabric PMS- 100% Polyester, thickness 0,30mm. Fire resistance class B-s1, machine washable.