| 摘要 |
PROBLEM TO BE SOLVED: To provide a water heating device which can properly prevent or suppress generation of drain in a region at a water inlet side of a heat exchanger, with a simple means, when the heat exchanger is totally thinned by making a single-stage of a heat transfer tube.SOLUTION: A water heating device WH includes: a heat exchanger HE1 wherein a meandering heat transfer tube T1 is provided in a single-stage horizontally; and a burner case 2 for storing a burner 5. Air passages 28A, 28B, 80 for allowing combustion air ejected from fans to be dispersed and flow into the burner case 2 are configured that an air supply amount to a region corresponding to the water inlet side tube body 11a of the heat transfer tube T1 and a vicinity thereof, of the burner case 2, is greater than an air supply amount to the other regions of the heat transfer tube T1. |
