| 摘要 |
A greenhouse is provided with a humidifying apparatus which is located at the top of the greenhouse and includes elements for controllably humidifying the greenhouse and to circulate air therein while displacing heat downwardly from the top section of the greenhouse. The humidifying apparatus includes a misting valve connected in series with a solenoid valve, there being further provided a control which actuates the solenoid valve selectively dependent upon the percentage of humidity in the greenhouse. A pair of fans are provided on opposite sides of the misting valve, these fans facing downwardly to propel air downwardly in the greenhouse both for the purpose of air circulation and for the purpose of cycling heat downwardly since it tends to collect in the top of the greenhouse.
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