In locations where outdoor wet bulb ≤ 60°F, a direct evaporative can often provide an indoorenvironment of 78°F and a relative humidity of 60%. In locations ≤ 68°F, an indirect–directevaporative cooler can maintain a comfortable indoor environment. In locations ≥ 72°F, an evaporative cooler with a supplementary vapor compression refrigeration may be cost effective. Because theinstallation cost of an indirect–direct cooler is higher than that of refrigeration, cost analysis is requiredto select the right choice. Evaporative coolers are not suitable for dehumidification except in locationswhere ≤ 60°F.