Industrial areas can be very hard to cool using conventional coolers. Industrial halls usually are very high, so it would take lots of electric power to use compressor based coolers. Thats the case why industry generally use only fans for ventilation, but this is not enought during summer season.
The solution for low cost and high effective cooling are evaporative coolers. Evaporative coolers can cool great amount of industrial area using only 10% of energy that conventional coolers would use. Evaporative coolers not only cool the air but they also ventilate halls. Evaporative coolers can be connected to existing ducts.