| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat source unit improving heat efficiency by efficiently absorbing latent heat of exhaust gas, and capable of efficiently recovering exhaust gas drain, and a hot water supply heating system provided with the heat source unit. <P>SOLUTION: The auxiliary heat source unit 5 for heating comprised of a heating combustor 5a and a heating heat exchanger 5b is provided with a hood 5c covering a top face of the heating heat exchanger 5b to horizontally exhaust combustion exhaust gas of the heating combustor 5a, a duct 5d connected to the hood 5c to perpendicularly guide the combustion exhaust gas, and a latent heat heat exchanger provided in an interior of the duct 5d to absorb the latent heat of the combustion exhaust gas and preheat water flowing into the auxiliary heat source unit 5 for heating. <P>COPYRIGHT: (C)2007,JPO&INPIT |
