The new ventilation system, which is made by Abbi-Aerotech, is using airtubes. It is specially made for calfs, dairy and young goats farms to avoid any cold draft as well as to realize the optimum ventilation. The tubes have special designed openings which are different for each particular farm. Airtube available in different diameter round inlet collar with zipper, fabric PMS- 100% Polyester thickness 0,30mm. Fire resistance class B-s1, machine washable.