Airflow DV150SE Ventilation Unit filters 2 x G4, 1 x F7 9041129

 Airflow DV150SE Ventilation Unit filters 2 x G4, 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.