Abstract: The invention relates to a changeover valve comprising a spherical valve body, which lies against a first valve seat in a first position and lies against a second valve seat in a second position, wherein an opening is provided in a region between the first valve seat and the second valve seat, which opening is adjoined by a further line, which ends at an outlet connection of the changeover valve, wherein the valve body has a diameter dKugel, and wherein at most a circle having a diameter deinschreib can be inscribed in a projected area defined by an orthogonal projection of the opening onto a selected projection plane, wherein deinschreib<dKugel, and wherein the projected area is noncircular when the diameter deinschreib of the inscribed circle reaches a maximum in dependence on the selected projection plane.

Abstract: Provided is a heating device exhaust gas arrangement with an integrated sound suppressor, having: a rigid exhaust gas pipe (1) which is made by bending and longitudinally welding a perforated metal sheet and which has an un-perforated, curved first pipe section (2), an un-perforated second pipe section (3) and, formed integrally with the first pipe section (2) and the second pipe section (3), a perforated sound suppressor section (4) between the first pipe section (2) and the second pipe section (3), and a sound suppressor housing (5) which externally covers the perforated sound suppressor section (4) and which is arranged such that the first pipe section (2) and the second pipe section (3) both extend at least predominantly outside the sound suppressor housing (5).