Entrée d'arbre, concentrique DN 80 / 125

Concentric shaft entry DN 80/125 is used to connect a coaxial chimney to a ventilation shaft. The concentric design allows simultaneous exhaust of combustion products and supply of combustion air, improving boiler efficiency. This part is necessary when installing or repairing boiler equipment in apartment buildings or buildings with central shafts. It provides a reliable and safe connection to the shaft.