| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat source machine that heats a plurality of systems of circulation circuits having different feeding temperature and can efficiently recover latent heat in a secondary heat exchanger. SOLUTION: The secondary heat exchanger 14 is disposed in the downstream of exhaustion of a primary heat exchanger 13 heated by a burner 12. Return hot water from a low-temperature heating circuit and return hot water from a high-temperature heating circuit are individually received from separate return openings 51 and 52, and only the hot water from a low-temperature heating circuit is heated through the secondary heat exchanger 14. COPYRIGHT: (C)2004,JPO
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