Simple fans and motor-suction fans made in stainless steel (AISI 304 Cr.Ni. 18/10). Equipped with brackets and plugs to secure them to the wall and a connector for the flexible stainless steel tube. They come with a wide plenum filter, detachable and re-generable metal filters or stainless steel labyrinth filters which force the fats down an enforced flow path. They are also equipped with ball valves to discharge combusted oils. The motor-suction models have a fan with two speed settings and on-off switch. We also manufacture custom-made central fans on request.