Abstract: The more or less greasy food to be grilled on the barbecue is placed on a grill above the burning coal. The coal is carried by an air-permeable support. Smoke, produced by the grease drops falling on the burning coal, is prevented from reascending and consequently from contacting the food to be grilled by a suction, carried out at the level of the coal support. This suction is carried out by creating a rising gas flow current in the thermally-conducting exhaust conduit. The conduit is heated by the coal itself used for producing the heat under the grill. The conduit communicates with a chamber, where the upper wall of the chamber forms the coal support. The rising gas flow current in the exhaust conduit produces a suction in the up-down sense of direction at the level of the coal support.

Abstract: A heating apparatus includes at least one combustion air inlet, a reverse-draft hearth having a grill positioned within a hearth plate, an ash receptacle for recovering combustion wastes, a fume outlet, a combustion chamber positioned under the reverse-draft hearth, and a heat recovery device. A heat transport and exchange fluid is adapted to be fed through the heat recovery device, and it circulates through the device in order to recover heat generated in the hearth. The heat recovery device also includes at least one casing positioned beneath the hearth, over the ash receptacle, and which is spaced from the walls of the heating apparatus. The rear portion of the casing is connected to the hearth plate so as to block combustion gases so that the combustion gases will pass over and thereafter under the casing prior to leaving the apparatus via the fume outlet.