The Helios Fans WSG 60/30 is a wall grille intended to cover intake and exhaust air openings, preventing the intrusion of rain, snow, and animals. It is sized to fit Helios duct fans and can be inserted into the duct’s cross-sectional area. Made from extruded aluminium with a natural anodised finish, the grille offers durability and corrosion resistance. Fixed louvres spaced 65 mm apart facilitate efficient airflow, while a galvanised sheet steel mesh grill with a 16 mm mesh width is positioned behind the louvres to provide extra protection without hindering ventilation performance.