Helios Fans KWL 340 D R

The Helios KWL 340 D L is a compact, ultra-flat ceiling-mounted heat recovery ventilation unit designed for central air supply and extraction in apartments and small detached homes. This left-hand model integrates seamlessly with Helios easyControls 3.0, enabling intuitive configuration and operation via network connection and web browser interface.

Built with a durable galvanized steel housing and white powder-coated inner and front panels, the unit features a double-wall structure with 20 mm thermal and acoustic insulation on all sides. All internal components are accessible via removable side panels, ensuring straightforward installation and convenient maintenance.

At the heart of the unit is a high-efficiency plastic cross-counterflow heat exchanger capable of achieving up to 90% heat recovery. Two quiet, high-performance centrifugal fans driven by EC motors handle both supply and extract airflow. The fans are maintenance-free and can be easily removed for cleaning.

Outdoor air is filtered with an ISO Coarse 75% (G4) filter, and an optional secondary filtration stage is available using ISO ePM1 50% (F7) or an activated carbon filter. On the extract side, a G4 filter protects the heat exchanger to ensure optimal performance.

With a maximum airflow rate of approximately 340 m³/​h, the KWL 340 D L is an efficient, space-saving ventilation solution ideal for left-side duct configurations in modern residential applications.