Common sense evaporative cooling
As hot outside air moves through wet cool cell pads, it loses heat by evaporating the water. The heat isn't destroyed but instead changes to another form, water vapor. So the incoming air is now cooler but its humidity has also increased. The drier the air, the more potential cooling is possible. 90° air with 20% humidity has the potential to be cooled to 67°, while the same 90° air with 60% humidity has only the potential to drop to 86°. Evaporative cooling will only lower the felt temperature so far depending on the air's humidity.
2 July 2021
4 minute read
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