The Helios Fans WSG 50/30 is a wall grille crafted to cover intake and exhaust air openings, preventing rain, snow, and animal intrusion. It is sized to fit Helios duct fans and can be inserted directly into the duct cross-section. Manufactured from extruded aluminium with a natural anodised finish, the grille offers durability and resistance to corrosion. Fixed louvres spaced 65 mm apart direct airflow efficiently, while a galvanised sheet steel mesh grill with a 16 mm mesh width is installed behind the louvres to provide added protection without compromising ventilation.