The Helios ELS EC 100/35 fan insert features electronic humidity control and two airflow levels (100 and 35 m³/h) for efficient ventilation. It offers adjustable switch-on delays of 0 or 45 seconds and selectable run-on times of 6, 10, 15, or 21 minutes to match varying ventilation needs. Its spiral casing and aerodynamically optimized radial impeller deliver high pressure with minimal noise, benefiting from ultraSilence technology. Installation is tool-free, with an automatic electrical contact closure upon plug-in. The energy-efficient EC motor ensures quiet, economical operation. The fan includes a flat, award-winning alpine white plastic façade and comes standard with a permanent filter and optical cleaning indicator for easy maintenance.