The size of the vents in an Greenhouse greenhouse cannot be defined by a single data point because greenhouse structures vary, resulting in different cooling times and rates.
For greenhouses with a large arch, hot air easily escapes along the top of the greenhouse film, so even small vents can achieve good ventilation.
However, for low-ceilinged greenhouses, due to the smaller arch, the hot air escapes more slowly from the vents, leading to higher internal temperatures. Therefore, the top vents need to be at least 40 cm wide to achieve the desired ventilation effect.
Polycarbonate Greenhouse ventilation emphasizes the principle of multiple small airflows to remove moisture and replenish carbon dioxide, providing the necessary raw materials for photosynthesis.
The vents should only be gradually opened once the set temperature is reached to maintain the greenhouse temperature.
Because spring often brings strong winds, ventilation should not be excessive; wind protection for the vents is also crucial.
Firstly, the density of the ventilation ropes in the greenhouse can be increased, and wide strips of cloth with high friction should be used as the ropes to prevent them from being loosened by strong winds.
At the same time, it is important to increase the inspection of the greenhouse during windy weather, especially to prevent the ventilation ropes from loosening or the vents from closing.
This could potentially have adverse effects on the greenhouse, causing damage to its components and affecting the growth of vegetables and other plants.