Study on Design Criteria for Domestic Hot Water Supply System by the Investigation with Questionnaire : Part 2-Investigation of Bathroom and Dressingroom, and Required Standards in Using Hot Water

Abstract

Following Part 1 of the report which made clear the general problems of present hot water supply systems for housings from aspects of their use of hot water, a questionnaire to obtain data on the present status of hot water usage and thermal emvironment and such of bathrooms and dressing rooms including differences among areas of Japan was conducted. There were 70 questions in the questionnaire and was carried out in the six areas of Sapporo, Fukushima, Tsukuba, Tokyo, Nagano, and Nagoya. The period was during January and February in 1989 mainly and the number of effective questionnaires returned was 664. From the viewpoints of 1. object and length of time of bathing and the number baths taken 2. method of heating water and time required usage of used water and its purpose 3. water temperature 4. air temperature of the bathroom and the dressing room 5. ventilation of the bathroom 6. area of the bathroom and the dressing room 7. volume of the tub and the height of the edge of the tub (which one must step over in order to get into the tub) and such, the results were analyzed and studeid including comparisons with results acquired from previous researches for setting required standards for the hot water supply system for housings.