"220V AC Cooling Fan" suction fan is the use of air convection cooling principle of negative pressure ventilation, the installation location of the door or window --- Natural inhale fresh air, indoor outdoor hot gases quickly forced out, any ventilation bad problems can improve ventilation cooling effect of up to 90% -97%. Machine using CAD / CAM design, with low investment costs, air volume, low noise, low energy consumption, stable operation, long life, high efficiency, automatic blinds closed from dust, water, beautiful; to hair, modern plant cooling ventilation is the best choice, but also ventilation. Environmental protection, energy-saving suction fan, cooling wet Lim will become the ventilation and cooling equipment market mainstream.