The Helios Fans WSG 315 is a wall-mounted grille designed to shield air intake and exhaust openings from rain, snow, and animals. Compatible with both rectangular and round duct entries, it offers flexible installation across various ventilation setups. Built from high-strength extruded aluminium with a natural anodised finish, the grille ensures long-term durability and corrosion resistance. It features fixed louvres spaced at 65 mm intervals for optimal airflow management. A rear mesh grill made of galvanised sheet steel with a 16 mm mesh width adds an extra layer of protection while maintaining efficient ventilation performance.