The Helios Fans KWL 45 – 160 WH‑L is a DN160 wall sleeve made from durable polypropylene, designed for use with the decentralized ventilation unit KWL EC 45. The sleeve measures 160 mm in diameter and is constructed from plastic material. It comes complete with a condensate wedge and two covers, each 800 mm in length, providing an effective and secure installation solution for ventilation systems.