Inline fan to extract the hot gas to collate in circular ducts. Casing made of stainless steel with an exterior air fork. Radial turbine with stainless steel backward bended blades and a directly attached motor. Motor out of the air flow, external rotor 100% regulable, via an electronic regulator or transformer. Temperature on the turbine up to 250ºC continuous degrees depending on the model. Mounting in any position.