Zehnder ComfoAir 350/550 Filter Set, ISO Coarse / ISO ePM1 (G4 / F7), 2 pcs airflow double stitched

double stitched

black or stainless steel finishes

fog and coarse dust particles (≥10μm)

The circular design means no squaring up is required

The SRD100 runs with 70% less noise than conventional fans

Zehnder ComfoAir 350/550 Filter Set, ISO Coarse / ISO ePM1 (G4 / F7), 2 pcs airflow double stitchedIdeally, filters should be inspected monthly and given a light vacuum to remove dirt and debris. Filters will eventually become blocked with residual debris and should then be replaced. Generally, blocking will occur every 6 12 months depending on the location (near busy roads or inner city areas tend block more quickly than remote country settings). To see the Zehnder Filter fiting video on youtube please select: Comfo Air 350 Filter video Zehnder P