| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a composite-type heating system for a greenhouse, having both an electrothermal heating apparatus and a fuel burning heating apparatus. Ž<P>SOLUTION: This heating system is configured such that a fuel burning warmer 2 and an electrothermal heating apparatus 3 are connected to each other with a vinyl duct 4, and air which is taken in with a blower 5 of the fuel burning warmer 2 is heated with a burner 6 or an electrothermal heater 16. When the room temperature in a greenhouse becomes ≤15°C, the electrothermal heater 16 and the blower 5 are operated, and when the room temperature in the greenhouse further drops to be ≤10°C, the burner 6 is operated in addition to the electrothermal heater 16 and the blower 5. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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