<；P>；PROBLEM TO BE SOLVED: To provide a heating facility for protected horticulture, which improves energy efficiency and is capable of following temperature change. <；P>；SOLUTION: This heating facility is such that a hot-water boiler 2 which detects the water temperature of hot water returning from a hot-water pipe 5, warms the hot water so as to keep at a target fixed temperature, and sends out to a hot-water pipe 4 is set outside a greenhouse 3, heat exchangers 6 and 7 set in the greenhouse 3 each have a radiating pipe arrangement 61 and a fan 63 to blow air in the greenhouse thereto, and a temperature detector 10 detecting temperature in the greenhouse is further set in the greenhouse 3, and when a detected temperature of the temperature detector 10 is less or more than a target value, a control device 8 puts on or off the fan 63 of each of the heat exchangers. The hot-water pipes 4 and 5 are connected to each other so as to circulate hot water between the hot-water boiler 2 and the heat exchangers 6 and 7. <；P>；COPYRIGHT: (C)2010,JPO&INPIT
