Zehnder Filter set 4x Coarse 45% (G3) for ComfoSpot Twin 40

This set consists of 4x filters Coarse 45% (G3).

Coarse 45% is the name according to the new filter standard ISO 16890. Course refers to particles 10 micron.

Coarse 45% means that at least 45% of particles in the size interval 10 microns are removed. G3 is the classification earlier used.