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Greenhouse Evaporative Swamp Cooler Information 

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How an Evaporative Swamp Cooler Works Nature's most efficient means of cooling is through the evaporation of water. A simple example is the cooling you feel when stepping out of a swimming pool- the water evaporates quickly from your body, taking heat with it. Our coolers do essentially the same thing by drawing hot air through wet pads using a blower. As water evaporates from the pads, it takes heat from the air with it, resulting in up to 30 degree cooler air being discharged from the cooler. Cooling Temperatures An evaporative cooler will nearly always deliver air cooler than 80 degrees F. The chart below shows that an evaporative cooler will deliver 78 degree air under a wide variety of typical summertime climatic conditions. In addition, the constant air movement created by an evaporative cooler lowers the temperature perceived by room occupants - called the "effective temperature" - by an additional 4 to 6 degrees below the "evaporative cooled temperatures" shown in the chart. Finally, an evaporative cooler works best in the hottest time of the day. This is because relative humidity drops quickly as temperature increases. For example, a morning relative humidity of 60 percent at 75 degrees will drop to only 31 percent when the afternoon temperature reaches 95 degrees.

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