This is a convertible cooker hood that can be used either for external evacuation {suction) (Pict. 1), or for internal re circulation (filtering) (Pict. 2). The centrifugal unit, dare in self extinguishing, anti-drip, heat-resistant polyunsaturate, is protected by patent. Its special characteristic is that it avoids sudden reversals of the air flow and that it eliminates aerodynamics losses. Methods of use The way the hood is to be used can vary according to different needs.