Ilto/Swegon Casa 300/350/400 F9 filter packet
Filter set including following filters:
2pcs G3 filter (mat), size 180 x 400 mm
1pcs F9 filter (panel), size 135 x 400 x 28 mm
Better filtering capasity than normal F7 class, for example if you have bad allergy
Label attach in panel filter were inform with arrow air flow direction, it will help to install panel filter to right way.
Filters change interval is shorter than the normal filter package, due to better filtering of the panel filter.