air cooler
US /ˈer kuːlər/
UK /ˈer kuːlər/
1.
a device that cools the air, especially one that uses the evaporation of water to reduce temperature, often used in dry climates
:
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We bought an air cooler for the living room to beat the summer heat.
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Unlike air conditioners, air coolers are more energy-efficient and add humidity to the air.