Because good odour control often means high costs for filters and equipment, many homegrowers try to avoid odour control - with unrequested results sometimes, as you can imagine...
Due to that, the well-known filter-producer PRIMA KLIMA has developed a variety of filters, the so-called ECO-Line, which is affordable an series of activ carbon filters, inexpensive and effectiv.

How can high quality be produced with low costs?
With the active carbon filters of the ECO-Line PRIMA KLIMA is filling about 1cm thinner layer of activ carbon. This has got no negativ effect on the efficiency of the filters, but on it's longevity. You should replace the activ carbon filters after about 11 monthes.
Additionally to that, the activ carbon filters of the ECO-Line has got a rough perforation, what results in lower production costs. Furthermore, the metal parts are about 0.5mm thinner.
This leads to thin and sharp flanges. Please be careful not to cut yourself!!!
Another point is the rough fleece, that the white covering is made of (pre-filter). The rough fleece only has an influence on the durability of the fleece, not on it's efficiency.
After all, you purchase an activ carbon filter with a very good price-performance ratio.

Effect: ca. 240m³/h
Flange: 125mm
Diameter: ca. 180mm
Height: ca. 400mm
Weight: ca. 3900g