Until recently, producers with tunnel-ventilated houses have used either fogging nozzles or evaporative cooling pads to reduce the temperature in their houses during hot weather. Both systems have proven successful in limiting heat stress and each has advantages as well as disadvantages. Evaporative cooling pads are capable of reducing the temperature in the house up to 20oF, but are relatively expensive and can require frequent maintenance. Fogging systems are fairly inexpensive but don't produ...ce as much cooling (10oF) and often contribute to wet litter and dirty equipment. Within the last year, a new type of evaporative cooling system has been developed which is a hybrid of the two systems, a fogging- pad system, that may offer producers the best of both types of systems.