Abstract
In this research, measuring the consumption of the hot-water supply for a year on 171 houses, the hot-water supply was analyzed in detail. As a result, the annual average hot-water consumption per person in small family was larger than in big family. Examining how to use in detail, the amount of continual usage during a single action was accounted for about 80% by short-time use of hot water supply. Households of young persons had a trend to use large amount of hot water supply during a single action, especially in high flow rate.
