The Helios Fans WSG 630 is a wall grille designed to shield intake and exhaust air openings from rain, snow, and animals. It is compatible with both rectangular and round duct connections, making it suitable for diverse ventilation setups. Constructed from durable extruded aluminium profiles with a natural anodised finish, this grille offers long-lasting strength and corrosion resistance. Fixed louvres spaced 65 mm apart ensure efficient airflow, while a galvanised sheet steel mesh grill with a 16 mm mesh width positioned behind the louvres provides additional protection without compromising ventilation performance.