For $5 at Lowes, I built an “external wort chiller.” I’ve never seen any other homebrewers with this setup, so I figured I’d post my results on the internet. With only the standard wort chiller it takes about 30 minutes to cool our wort from boiling to yeast pitching temperature (85F for us). With the external chiller, it took just under 20 minutes. This may seem like a long time to you, but we live in the middle of a desert. Ambient temperature is often over 100F on a summer brew day.
Here’s a picture of our full chiller assembly. The internal chiller is on the right, and the external chiller is on the left.