Conduit for a circuit of a flue installation, wherein the conduit extends vertically or substantially vertically between a lower conduit section (2 b) connected to a wood heating appliance, of the wood stove or insert type, and an upper conduit section (2 a) leading to a building outlet, said circuit including - a central chamber for the evacuation of the combustion products generated by said wood heating appliance, and - a peripheral chamber for the supply of said heating appliance with combustion air, wherein said conduit comprises: (i) a central chamber including two through-orifices, an upper one (11 a) and a lower one (11 b), both extending coaxially with respect to the axis of said conduit, said through-orifices (11 a, 11 b) being intended to be connected to said central chamber of said evacuation circuit for the circulation of said combustion products to be evacuated, (ii) a peripheral chamber, surrounding said central chamber, including two annular through-orifices, an upper one (15 a) and a lower one (15 b), both extending coaxially with respect to the axis of the conduit, said through-orifices (15 a, 15 b) being intended to be connected to said peripheral chamber of said evacuation circuit for the circulation of the combustion air, and (iii) an intermediate chamber, inserted between said central chamber and said peripheral chamber, including at least two through-orifices (13 a, 13 b), said orifices (13 a, 13 b) being intended to be connected to a circuit adapted to generated a flow of air through said intermediate chamber and between said through-orifices (13 a, 13 b), in order to collect and render a part of the heat energy contained in said combustion products by heat energy transfer at least from said central chamber to said intermediate chamber, wherein said conduit also comprises: - a central tube, delimited by an inner surface (10 a) defining said central chamber and by an outer surface (10 b), wherein said central tube has two ends, an upper one (10 c) and a lower one (10 d), each defining one of said through-orifices (11 a, 11 b) of said central chamber, - an intermediate tube within which is housed said central tube, wherein said intermediate tube, delimited by an inner surface (1 2 a) and an outer surface (12 b), has two ends, an upper one (12 c) and a lower one (12 d), air-tightly fastened to the outer surface (10 b) of said associated central tube, to define together, between each other, said intermediate chamber, wherein said intermediate tube includes said two through-orifices (13 a, 13 b) of said intermediate chamber that are arranged near said ends (12 c, 12 d), and - a peripheral tube within which are housed said central tube and said intermediate tube, wherein said peripheral tube is delimited by an outer surface (14 b) and by an inner surface (14 a), characterized in that said inner surface defines the peripheral chamber with the opposite tubes (10, 12), said peripheral tube has two ends, an upper one (14 c) and a lower one (14 d), arranged remote from the ends (10 c, 10 d) of said central tube to delimit together said annular through-orifices (15 a, 15 b) of said peripheral chamber, and in that said orifices (13 a, 13 b) of said intermediate chamber are continued by tube sections (13 c, 13 d) that run through the peripheral chamber and that lead to the outside through the peripheral tube. (i) a central chamber including two through-orifices, an upper one (11 a) and a lower one (11 b), both extending coaxially with respect to the axis of said conduit, said through-orifices (11 a, 11 b) being intended to be connected to said central chamber of said evacuation circuit for the circulation of said combustion products to be evacuated, (ii) a peripheral chamber, surrounding said central chamber, including two annular through-orifices, an upper one (15 a) and a lower one (15 b), both extending coaxially with respect to the axis of the conduit, said through-orifices (15 a, 15 b) being intended to be connected to said peripheral chamber of said evacuation circuit for the circulation of the combustion air, and (iii) an intermediate chamber, inserted between said central chamber and said peripheral chamber, including at least two through-orifices (13 a, 13 b), said orifices (13 a, 13 b) being intended to be connected to a circuit adapted to generated a flow of air through said intermediate chamber and between said through-orifices (13 a, 13 b), in order to collect and render a part of the heat energy contained in said combustion products by heat energy transfer at least from said central chamber to said intermediate chamber, - a central tube, delimited by an inner surface (10 a) defining said central chamber and by an outer surface (10 b), wherein said central tube has two ends, an upper one (10 c) and a lower one (10 d), each defining one of said through-orifices (11 a, 11 b) of said central chamber, - an intermediate tube within which is housed said central tube, wherein said intermediate tube, delimited by an inner surface (1 2 a) and an outer surface (12 b), has two ends, an upper one (12 c) and a lower one (12 d), air-tightly fastened to the outer surface (10 b) of said associated central tube, to define together, between each other, said intermediate chamber, wherein said intermediate tube includes said two through-orifices (13 a, 13 b) of said intermediate chamber that are arranged near said ends (12 c, 12 d), and - a peripheral tube within which are housed said central tube and said intermediate tube, wherein said peripheral tube is delimited by an outer surface (14 b) and by an inner surface (14 a),