BY WHAT MAXIMUM RELATIVE HUMIDITY EVAPORATIVE AIR COOLERS CAN BE USED?
Evaporative air coolers stably work by relative air humidity of outside air up to 70%.Their effectiveness increasing by decreasing relative humidity of outside air and increasing of the temperature of outside air. However they are used quite well and under higher levels of relative humidity (up to 80%). In this case the number of air changes in the premises must be bigger as usually recommended for each concrete climatic zone (up to 60 changes of air during one hour). By the level of relative humidity of outside air more then 80% the air coolers must be operating only as ventilators. This also creates some positive effects and increases the level of comfort in the premises with the number of changes of air 30-60 times per hour.
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