Vent-Axia Brown External Grille is designed to simplify installation and improve the finish of 100mm through the wall installations, also providing an external grille and water ingress protection shroud. The Wall Kit can be fully installed from inside the building, avoiding the need for scaffolding and significantly reducing the cost and complexity associated with these sites. After core-drilling a 117mm hole or utilising an appropriate existing hole, the Kit simply pushes through from the inside of the building. Spring pins secure the external grille in position and the external shroud deploys around the grille covering up break-out from the external surface.