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Air Cooler Wiki: A Guide to Evaporative Cooling

An evaporative air cooler uses water evaporation to lower the temperature of moving air and adds moisture as it runs.

This air cooler wiki explains the basics behind portable and larger evaporative units. A fan moves air over water-saturated media; evaporation removes heat from the airstream and increases its moisture content. The US Department of Energy notes that evaporative coolers work best in arid climates.

Air Cooler Wiki: A Guide to Evaporative Cooling

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Questions before you buy

How does an evaporative air cooler work?

It draws air across wet media. Water evaporates and cools the moving air while adding moisture.

Where do evaporative coolers work best?

The US Department of Energy says they work best in arid climates, where evaporation is more effective.

Does a portable air cooler lower room temperature?

A personal unit may cool the directed airflow rather than the whole room. Check the manufacturer coverage description.

Is an evaporative air cooler the same as AC?

No. Evaporative coolers use water and airflow; air conditioners use refrigeration to remove heat and usually need heat rejection outdoors.