Rainproof louvered air outlets are primarily used in ventilation projects, serving the purpose of rainproof ventilation. They consist of rainproof louvers and side frames with a drip frame.

Ventilation engineering use. Rainproof louver grilles are designed for long-term ventilation requirements in machine rooms or other public spaces. They consist of rainproof blades with a collecting channel (LGC free) and a side frame with a drip edge.