Helios Fans KWL 250 W ET

The Helios KWL 250 W ET is a compact mechanical ventilation unit with heat and moisture recovery, designed for centralized air supply and extraction in residential properties up to 190 m². It integrates seamlessly with the Helios easyControls 3.0 system, offering smart network connectivity and browser-based operation.

Its external housing is constructed from white powder-coated galvanized steel, while the internal structure uses high-performance EPP insulation for optimal thermal efficiency. The intake air connection can be configured on either the left or right side, with the standard position on the right. All internal components are accessible via removable front panels, allowing for easy maintenance and servicing.

This unit features energy-saving EC fans and a plastic cross-counterflow enthalpy heat exchanger that recovers both heat and moisture, delivering up to 90% recovery efficiency. Outdoor air is filtered through an ISO Coarse 65% (G4) filter, with an optional second stage ISO ePM1 50% (F7) or activated carbon filter available for enhanced filtration. The extract air path also includes an ISO Coarse 65% (G4) filter positioned before the heat exchanger.

Supporting airflow rates up to approximately 250 m³/​h, the KWL 250 W ET is ideal for energy-efficient ventilation with additional moisture recovery, offering a quiet and smart solution for modern residential applications.