| 摘要 |
<p>A water heater is provided in which any neutralization process of drain is not required and an excellent heat efficiency is achieved. A route of exhaust gas which is passing through the main heat exchanger (18) is divided into a first exhaust gas chamber (23) having a secondary heat exchanger (19) and a second exhaust gas chamber (24) having a drain evaporator (100). Hence, hot exhaust gas which is passing through only the main heat exchanger (18) flows both into the secondary heat exchanger (19) and the drain evaporator (100). Therefore, in the secondary heat exchanger (19) exhaust gas heat can be efficiently recovered by utilizing the hot exhaust gas, and in the drain evaporator (100) drain can be evaporated efficiently by utilizing the hot exhaust gas. <IMAGE></p> |
