| abstract |
Water-heating boiler made of welded steel plates, having a combustion chamber which is heated by the lintel burner via an axially arranged gas blower, as addition to the patent (Patent Application P 3524017.2), in which a gap (16) for recirculating waste gases is formed around the flame pipe (14), which gap is connected to a flue-gas duct (11) and the combustion chamber (7) and this connection (17) having a lower through-flow resistance than the flue-gas duct (11) which it bridges and the burner chamber. The main application areas of the invention are central heating boilers for detached or semi-detached houses. <IMAGE> |