Helios Fans KWL 300 W ET L

The Helios KWL 300 W ET L is a compact heat recovery ventilation unit designed for centralized supply and extract ventilation in residential buildings and apartments. This left-hand version is optimized for intelligent operation through Helios easyControls 3.0, offering seamless network integration and web-based control.

Its robust housing is made of powder-coated white galvanized steel and features a double-walled construction with 12 mm of thermal and acoustic insulation throughout. All components are easily accessible via removable front panels, ensuring simple installation and hassle-free maintenance.

The unit is equipped with energy-efficient EC fans and a high-performance enthalpy cross-counterflow heat exchanger, which enables both heat and moisture recovery with an efficiency of up to 90%. Outdoor air is filtered using an ISO Coarse 75% (G4) filter, with the option to add a second filtration stage using ISO ePM1 50% (F7) or an activated carbon filter. The extract air stream is also protected by an ISO Coarse 75% (G4) filter before the heat exchanger.

With an airflow capacity of up to approximately 300 m³/​h, the KWL 300 W ET L is a powerful, energy-saving ventilation solution ideal for left-hand configurations in modern residential spaces.