| 摘要 |
PROBLEM TO BE SOLVED: To stably perform temperature control in a bathroom by changing hot water supply quantity to a heat exchange part without changing supply flow of heated water from a hot water supply machine and changing heating capacity to keep supply hot water temperature constant. SOLUTION: Hot water HW is jetted from a hot water jet nozzle 12 provided on a jet water tube 11 of a sauna piping system 10 to be connected to a supply hot water piping system 20 to a bathroom, so the inside of the bathroom is used as a sauna room. A drain water tube 13 is branched to the jet water tube 11 in the sauna piping system 10, and hot water quantity of the drain water tube 13 is controlled by a hot water quantity control device 31 in accordance with a room temperature detected by a temperature detector 30 installed in the bathroom. |
