CHARACTERISTICS: Tower for fresh air/exhaust air flow. CONSTRUCTION: Circular blades made in painted aluminium, complete with bird net. Duct and hat made of galvanized steel, aluminium and stainless steel. UTILIZATION: Housing outside areas with mounting flange or other means system on demand. ACCESSORIES: • Sound attenuator inside the duct. DETAILS: PERFORMANCES: The project of the AT must be made according to the required data. Our technical department is at your disposal for any need.