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You Asked:
How does a swamp cooler work? — Stacie, Sedro Woolley, Wash.
Marshall Answered:
Let’s imagine that you live in a hot area. With a fan, some window screen and water you can create a “swamp cooler”, also known as an evaporative cooler. You let water trickle down over the screen, and let the fan blow air through the screen. As the water evaporates into the air, it cools the air. The amount of cooling depends on the amount of humidity in the air. You will often find swamp coolers in barns, farmers’ markets, greenhouses, etc. because they are an inexpoensive way to cool the air.
For more details see: How Swamp Coolers Work
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