Air conditioning machines; containing a motor driven fan, other than window or wall types, incorporating a refrigerating unit and a valve for reversal of the cooling/heat cycle (reversible heat pumps)
Air ducts are the most important elements of ventilation systems. Their main task is to ensure the distribution of air flow through the premises and to remove the "exhaust" air from the building. That is why the manufacture of air ducts is based on a combination of proper selection of materials and careful calculation of the geometric parameters of the structure.
