NAFFCO offers multi-stage evaporative air conditioning systems that cool the air in hot and dry areas through contact with water in two stages. Where, in the first stage, the outside air is drawn and passed through a cold water heat exchanger, which results in dry air cooling without the air coming into contact with water and without adding moisture. Then comes the role of the second stage in passing the air produced from the first stage on a medium saturated with water with special specifications, so that the air comes out cooler and with the required degree of humidity.