The Helios Fans KWL EC 45 – 160 is a decentralized ventilation system designed for installation in exterior walls of new constructions and renovation projects. It features a ceramic heat accumulator that efficiently recovers heat, along with a flow straightener to optimize airflow. The unit includes an EC axial fan protected by a grille, an insect screen to prevent pest entry, a removal tool (cord) for easy maintenance, and a durable EPP half-shell base for secure installation.