| 摘要 |
PURPOSE:To make it possible to increase the safety of the titled hot water supplier and also increase the heating capacity by heat exchanging the blast air by the function of a blower for hot water to convert the blast air into hot air. CONSTITUTION:In a hot water boiler 15, water flowing through a hot water circulation pipe 20 is heat-exchanged with combustion gas heat in a heat-exchange pipe 22 and heated, and circulated and supplied to the heat-exchange pipe 22 in a form of hot water. Accordingly, sucked air is heat exchanged with hot water in the heat-exchange pipe and heated and blown off into a manhole 13 through a duct 12. Accordingly, the safety of the device is high and the heating capacity is increased. |
