Yes, evaporative air coolers do work. They are an effective and efficient way to cool a space by using the natural process of evaporation. Evaporative air coolers work by drawing in hot, dry air and passing it through a wet filter. As the air passes through the filter, the water evaporates, cooling the air. This cooled air is then circulated throughout the space, providing a comfortable environment. Evaporative air coolers are an energy-efficient alternative to traditional air conditioning systems, as they use less energy and require less maintenance.