Zehnder ComfoEdge Dupla combined external wall grille for DN 125 and DN 160 is suitable for connecting fresh air and exhaust air in one combined element. The Combined external wall grille can be mounted horizontally and vertically on the facade. The special construction of cover plate and lower casing ensures optimised pressure loss and prevents recirculation of the exhaust air. Installation without thermal bridges is possible with the Zehnder ComfoPipe Compact ventilation tube. Predefined fixing points for wall mounting with fixing screws included in the standard scope of delivery.. The housing and cover plate are made of galvanised sheet steel. The grille is powder-coated and available in white (RAL 9016) and stainless steel finish.