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Evaporative Cooling vs Air Conditioning for Workshops

Evaporative cooling suits large, open, or semi-open workshops where air exchange is already required and where the climate allows evaporation to do useful work. Its advantages, as described on the 18000 CMH product page, are lower power consumption and lower operating cost compared with conventional air conditioning, fresh air supply, and no refrigerants. Its limits are humidity and control: it cannot dehumidify, it cannot hold a precise temperature in a sealed space, and its performance falls as ambient humidity rises. Refrigerant air conditioning suits sealed spaces, spaces with strict temperature or humidity targets, and climates where evaporative cooling underperforms. Its cost is higher power consumption and a closed system that recirculates air rather than supplying fresh air. Many workshops use both: evaporative cooling for the main hall, and refrigerant cooling for a control room, a laboratory, or a small sealed area inside the hall. That combination is worth asking about explicitly, rather than assuming one system must serve the whole building.