| 摘要 |
PROBLEM TO BE SOLVED: To obtain a heat source machine 100 comprising a burner 2 for burning fuel being fed together with combustion air, and a heat exchanger 10 for heating the heating medium liquid by exchanging head between hot condensate being supplied from a heat radiating apparatus 200 and combustion gas being supplied from the burner 2 in which heat of combustion gas can be recovered efficiently through a simple arrangement even if the temperature of hot condensate is on the order of dew point of the combustion gas or above. SOLUTION: The heat source machine comprises a heat exchanger 9 for heating combustion air by exchanging heat with hot condensate discharged from a heat radiating apparatus 200 and being supplied to heat exchangers 10 and 11 for heating hot water wherein the heat exchanger 10 for heating hot water is supplied with hot condensate discharged from the heat exchanger 9 for heating combustion air and having a temperature not higher than the dew point of combustion gas and recovers the condensation latent heat of steam in the combustion gas. |
