抄録
In this report, the result of experimenting on efficiency of various changes of the ambient temperature and the water supply temperature by the Standard Usage Mode and the Multi Usage Mode is described. The purpose of the efficiency experiment is two points (the grasp of the influence that the ambient temperature, the water supply temperature of the heater, and the Usage Mode give efficiency and the grasp of the change in efficiency according to the kind of the heater). As a result, the efficiency in winter rose in the latent heat collection type while the efficiency of summer rose in the expression heater as for the old model momentarily when the experimental condition was seen.
