To provide a heating system which is capable of supplying hot water to a radiator, and free from or difficult to perform the intermittent combustion in a bath room heating system in which a water heater having one-boiler and two water-way type preheating system of bath tub water which is capable of heating with large capacity in a single operation of preheating of bath tub water, and free from or difficult to perform the intermittent combustion, and the radiator to heat the bath room by supplying hot air in the middle of a circulation circuit to connect the water heater to a bath tub are installed.
A heat exchanger 20 and a heating part 21 are provided behind a reheating type heat exchanger 17 in the middle of a circulation circuit in a water heater, and the temperature of water in a bath tub is low, the water is heated by the reheating type heat exchanger 17, and reheated by the heat exchanger 20, and the reheating capacity is improved. When the temperature of water in the bath tub rises, the combustion is performed only in the heating part 21, the continuous operation becomes possible with small capacity, and the intermittent operation is eliminated or reduced.
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KATAGIRI TAKAO
MUNEMURA HIROSHI
KAWAMURA MASAYUKI
NIHON YUPRO CORP
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