There are many different styles of wort chillers on the market and they are easy to build at home.
Another cost effective method (if you ferment in buckets) is to freeze a couple of 20 oz plastic pop bottles filled with water. Make sure to remove the labels and clean off the glue. Sanitize the outside of the frozen bottles, make sure cap is on tight, and place in the hot wort. Use a sanitized pair of tongs to carefully remove the bottles when the wort is cool.
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