A fan (10) includes: an external ferrule (12), whose internal surface (20) delimits a vein of air (14), a wheel (26) provided with blades (28) rotatably mounted in the ferrule (12) for setting into motion the vein of air, a motor (22) for driving the wheel (26), an electric circuit (40) including components (44) for controlling and powering the motor (22), which circuit (40) includes elements for cooling the components (44) by circulating air taken from the vein of air (14), wherein the cooling elements include a downstream area intake tapping aperture (52) and an upstream tapping aperture (54, 56) for reintroducing air formed through the internal surface (20) of the ferrule (12), and at least one continuous cooling conduit (50) connecting the upstream and downstream tapping apertures isolating the components (44) of the electric circuit from the air circulating in the cooling conduit.