The evaporative cooling pad cooling system with exhaust fan (negative pressure fan) is more and more welcomed by the majority of users because of its low input cost and ultra-low operation cost.The exhaust fan (negative pressure fan) and cooling system not need too much maintenance work. It is an excellent workshop cooling equipment.However, in order to ensure the longer service life and better effect of the cooling system, some maintenance work still is neceaasry.Here are the seven items we should pay attention to in the maintenance of the evaporative cooling pads :