Brewing Step 5: The Solution is Cooled Quickly to the Fermenting Temperature

As soon as the sustained boil and hop additions have completed, the Wort is cooled to the Fermenting Temperature.

The temperature change should be done quickly. Cooling should ideally take 15 minutes, and definitely less than an hour. A quick transition from hops boiling to the pitching temperature minimizes unwelcome flavors and reduces cloudiness of the beer.