DC Cooling Fan obstruction

"DC Cooling Fan" by the sun's radiation will be more let moss, algae grow up, causing congestion and, therefore, decided not to let direct sunlight curtain, but also do not use the transparent pipes, filters, etc. Also avoid impurities attached in the curtain sheet or water circulation system, because any pollution problems are likely to cause serious consequences and affect the normal use. Winter can be a plastic sheet covering the outside "DC Cooling Fan" piece, so that can play a workshop insulation can be dust, insect netting and so on. For greenhouse cultivation, "DC Cooling Fan" on the need to have some light, heat or humidity cultivated plants can be used, if you want unsuitable for plant growth season, kind of counter-seasonal vegetables, then need to spend a lot of time training, insulation is the inevitable need to pay attention.