The Helios Fans WSG 100/50 is a robust wall grille designed to protect intake and exhaust air openings on building exteriors. It prevents the entry of rain, snow, and animals while allowing efficient airflow. Designed to fit seamlessly with Helios duct fans, it can be inserted directly into the duct’s cross-sectional area. The grille features a sturdy construction made from natural-colour anodised extruded aluminium profiles, with fixed louvres spaced at 65 mm intervals. Behind the louvres is a protective mesh grill made from galvanised sheet steel with a mesh width of 16 mm, offering additional durability and screening.