The chamber booths serve to prevent the dust from spreading around the room and to allow its recirculation. Powder coating separation can be through filters, cyclones or combined. Filter booths are generally recommended for chambers and for smaller openings. Passage booths are most commonly used in conveyor belt conveyor systems or for painting very long workpieces. Powder coating separation is most common over cyclones or multicyclones. In some cases, the powder separation filter may be additionally applied. Mostly they are made to order.