In most cases, temperature at 20-25。C, humidity 50-70% is the right environment we hope to maintain the plants in the greenhouse growing.A temperature too high will cause poor plant growth, decrease quality, or even death. In hot weather, because of the heat conduction, thermal radiation, and failed to take measures to cool,the temperature in the greenhouse will higher 1 0-20 。C than air temperature outside, the production activities can not be normal. So take effective measures to achieve summer cooling greenhouse production yield, efficient, and stable the only way. "coolingpad- fan" of the vertical ventilation cooling combination is the most economical and effective measures to cool the greenhouse in summer. Years of practical application shows that even in the hottest weather, reasonable design and installation of coolingpad- fan cooling system can still control the temperature in greenhouse at 28。C or so, thus the production of high temperature can been minimized to the adverse effects. In hot summer,your production or work environment will need the assistance of the system of our “Hilda” cooling-pad.