Abstract: A collecting hood for capturing exhaust air above cooking areas, production devices and the like is provided. The collecting hood includes a vapor chamber, an extraction chamber and an air supply chamber. The vapor chamber is downwardly open and tapers upward. The extraction chamber is separated from the vapor chamber by a filter or a separator. The filter or separator forms an inclined boundary of the upwardly tapering vapor chamber. The air supply chamber tapers downward and merges at its bottom end into a curved deflection region which opens out into a discharge opening which is arranged at a bottom end of the vapor chamber. Supply air, which is blown into the air supply chamber, emerges from the discharge opening horizontally or upwardly at an angle in the direction of the filter or separator. A negative pressure chamber is arranged between the vapor chamber and the air supply chamber.