The so called dry extraction walls are a.o. being used at painting and processing of polyester and other synthetic materials. The walls are equipped with a perforated Adreae-pleated filter. To protect this filter one could use a paint spray filter. A combination of these two filters will create a 99% filtering. The extracted air, as well as with conventional as water-based lacquers should be carried out to the outside. The suction walls can be delivered in various measures as well as mobile versions, side panels and a canopy.