Airflow DV110SE Ventilation Unit filter 2 x G4 and 1 x F7 vent-axia-filters-cat-56 Zehnder P/N 400 100 084

Zehnder P/N 400 100 084

Greenwood inline silent fans are 70% quieter than standard axial fans when operating

This is the 'TW' model which is a single speed fan operated via a light switch or pull cord and has an integral overrun timer

Pull Cord with Timer Mod

For the Humidistat this means there is no no fixed humidity point for activation

Airflow DV110SE Ventilation Unit filter 2 x G4 and 1 x F7 vent-axia-filters-cat-56 Zehnder P/N 400 100 084Airflow DV110SE filter 2 x G4 and 1 x F7 G4 filters are of courser grade and designed to prevent insects, leaves and other small debris from entering the home. F7 Filters are fine grade and designed to capture small and often invisible particles such as pollen spore, bacterium and dust.