HELIOS Control element slide switch KWL BE Eco

Helios KWL EC 450/500 ECO/PRO/W G4+G4 Filter Set (Standard)

Helios KWL 360 W ET 1xF7 Filter (Smog and Pollen) Analogue

Helios KWL 360 W ET G4+G4 Filter Set (Standard) Analogue

Helios KWL 360 W ET 1xF7/AC Activated Carbon Filter (Odour) Analogue