PURPOSE:To enable a hot water to be fed to all houses, reduce a maintenance fee and facility fee without generating any noise by a method wherein a hot water storing tank at the upper-most part and several heat collectors are connected in sequence from a low order of mounting level to a circulation pipe so as to form a loop. CONSTITUTION:Several heat collectors 1 are arranged at a place of a building constituting collective housings where a better sun-shining is found, hot water storing tank 6 arranged at the upper-most part and heat collectors 1, 1a to 1c are connected in sequence by a circulation pipe 2 from a low mounting level position to a higher position so as to form a hot water circulating loop of series connection. With such an arrangement, as the hot water is transmitted from the low level position to the heat collector 1 at a higher level position, it is possible to get hot water of high temperature and thus it has an effect capable of easily taking out hot water of high temperature. In addition, since this is a natural convection flow type, a deterioration of dwelling environment caused by noise is not generated, but a maintenance fee, a facility fee can be reduced by an amount corresponding to the non-required power.
展开▼
