Different crops prefer to different circumstance. For example, tomatoes and pepper prefer to insulation of heat, while other crops may suffer from such heat. Cultivation means pretty much work and concerns need be paid attention, the temperature and humidity of the inside air, the temperature and humidity of the soil, the lighting,

Actually when plan greenhouse at very beginning, better make sure your greenhouse equipped with sufficient ventilation which is important way to help you react efficiently and quickly for the concerns mentioned. Roll up ventilation provides very good passive ventilation, allowing heat and humidity change. Then with help of roll up ventilation, it helps to solve the problem of mold and disease. Meanwhile, roll up ventilation also makes sure of resources of basic needs for healthy growing of crops:CO2.

At present growers have two alternatives for roll up ventilation,the manual and motorized ones. Compared to the manual hand cranks, the electric motorized is more time saving and can be applied to longer film rolling length. However both models are good, efficient and works well in operation.

Contact and check with Evans Greenhouse for best offers of the manual hand cranks and motorized winches!