Airflow BV400 Ventilation Unit filter 2 x G4 material 90000322 150-350 Duct size 150mm Long life

Duct size 150mm Long life filter included

Zehnder P/N 659 000 120

1 x Mounting foot for duct fan

'X' suffix models also have powered electric anti-backdraught shutters 258512

ZGS2 - 2 position switch to provide manual control between Low and High speed

Airflow BV400 Ventilation Unit filter 2 x G4 material 90000322 150-350 Duct size 150mm Long lifeAirflow BV400 filter 2 x G4 material 90000322 This is a pair of courser grade G4 filters designed to prevent particles, insects and other airborne debris from entering the home. F7 fine filters, used to catch small and often invisible particles such as pollen spore bacterium and dust are also available see model reference 90000323