Ventilation

• Reducing the temperature of the greenhouse air
• For replenishing carbon dioxide supply
• For moderating the relative humidity of the air.
• Air temperatures above 35°C are generally not suited for the crops in green house.
• It is quite possible to bring the greenhouse air temperature below this upper limit during spring and autumn seasons simply by providing adequate ventilation to the greenhouse.
• The ventilation in a greenhouse can either be natural or forced.
• In case of small green houses (less than 6m wide) natural ventilation can be quite effective during spring and autumn seasons.
• Fan ventilation is essential to have precise control over the air temperature, humidity and carbon dioxide levels.