An roofing eolienne

Wind roof device includes a rotor axis of rotation substantially horizontal at right angles to the wind direction, and placed in a frame (2) intended to be positioned on the ridge of a roof, the frame (2) comprising on both sides of the roof, a set of deflectors (3) adapted to focus the air flow towards the rotor. Each deflector assemblies (3) comprises four walls, two side walls (33), an upper wall (34) and a bottom wall (32) forming a tunnel (3) conically tapering end thereof outer (30) towards its end (31) and the frame (2) and the sets of baffles (3) comprise means (36, 37) designed capable of allowing an adaptation to the slopes of the roof (1), while retaining for tunnels (3) the same ratio between their openings (30, 31).