| 摘要 |
A fin (13) includes a cut and raised slit (13b) and a cut and raised wall portion (13a). The cut and raised slit (13b) is formed in a region (RA) adjacent to at least one through hole (13ca) of a plurality of through holes (13ca) in a first direction (DA) and has a tunnel-shaped hole (13ba1, 13bb1, 13bc1) extending in a second direction (DB) intersecting the first direction (DA). The cut and raised wall portion (13a) is located in the second direction (DB) of the cut and raised slit (13b), protrudes toward a main surface (MS) of the fin (13), and extends along the first direction (DA). Thus, a heat exchanger and a water heater capable of sufficiently conducting an amount of heat of a combustion gas to a heat conduction pipe even in a blind spot of a flow of the combustion gas of the heat conduction pipe and suppressing noise can be realized. |
