Generally, the optimum ambient temperature for crop growth is 20--25℃. Cooling pad and exhaust fan system is the most economical way for agriculture to keep this temperature.
Cooling pad and fan system uses the evaporation cooling principle of water to achieve the cooling purpose. The specially made water wet curtain can ensure that the water can evenly wet the whole cooling wet curtain wall. When the air penetrates the wet curtain medium, it exchanges heat with the water and air on the surface of the wet medium so as to achieve the humidification and cooling of the air.
Light trap is available for special medical hemp light deprivation greenhouse. The most effective working distance is 40-50m.