Fanmaster Portable Evaporative Air Cooler Single Directional PACISDThe Ouber PACISD is an industrial evaporative air cooler which utilises the natural process of using evaporation to cool the air. The PACISD uses a low wattage water pump to circulate water from the water tank on to four cooling pads, which in turn becomes very wet. The 1. 1KW fan draws air from outside the unit through the damped pads. As it passes through the pads the air is cooled by evaporation. The PACISD is ideal for open areas and is capable of