| 摘要 |
PROBLEM TO BE SOLVED: To provide an antifreezing mechanism for a heating apparatus which can prevent piping forming a water circulating path from being frozen. SOLUTION: In the heating apparatus, a pump 9 is connected to the heater 2 by the piping to form the water circulating path. The pump 9 is driven to circulate hot water 8 heated by a heating source in the water circulating path. A temperature detecting means 35 for detecting the temperature of the piping is provided. When the temperature of the piping is lower than the operation start temperature T1 of the antifreezing pump, the pump 9 is driven to circulate the hot water 8 in the water circulating path. |
