This work was carried out to propose a midel of the most effective layout and installation for applying the Solar Hot Water system to Apartment and to offer the vasic data for promoting the distribution of Solar Hot Water system in the country. For this purpose, the performed experiments are as follwing: 1) to investigate the amount of hot water and to analyze energy use trend of hot water in Apartment. 2) to analyze the economical efficiency by measuring the amountnof hot water and the cost of hot water system used in Apartment.
