If you talk about Fan coolers that use water evaporation to highjack hea,t you are correct. They are useful up to 70% air humidity.
But for fan alone it can be useful even in high temperatures and high humidity.
78 F (25,55 Celsius) it's not too much.
Quote:
Originally Posted by aerohead
Around here they work up to a point,then with the relative humidity, it creates a heat index value which exceeds what is tolerable to humans. We can have dew points of 78-degrees F.Just sitting can cause exhaustion.
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