| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a vacuum type water warmer that can improve thermal efficiency without significantly increasing a heat transfer area.SOLUTION: A vacuum type water warmer comprises: a first vacuum type water warmer 4 comprising a heat medium heating burner 2 and a first heat exchanger 3; and a second vacuum type water warmer 6 comprising a second heat exchanger 5 and configured to heat a heat medium by exhaust gas G of the first vacuum type water warmer 4. The first heat exchanger 3 is connected to the second heat exchanger 5 so that water is supplied from the second heat exchanger 5.</p> |
