Now you have to cool that wort down! Quickly. This is what the gurus call hot-side working. Every action you take here has some detrimental effect on your beer. You must get oxygen in there, without allowing germs. You have to cool it to 20 degrees as soon as possible, because anything warmer, and your yeast will not survive. The most dangerous time for your wort is between 48 and 24 degrees, the growth temperature range preferred by our enemy: faulty hygiene.
Once the hops has been infused to tatse, it is time to take off the heat. Here starts the most difficult part of brewing. It is not impossible, but you will want to spend your first non-essential funds here. You need to construct yourself a cooler. There are many, many ways, including sterilised ice cubes. Tried it, it worked, sort of. Swozzling the wort in a steel pot inside a basin filled with icewater does work, takes half a night for ten litres, and will almost assuredly end up in an infected, sour beer. Once you have your sterile, cool wort in your fermenter tank, you are ready to PITCH THE YEAST.
Our logo, the crazy chicken, has forefathers in our history of wort cooling. Happily, that was all before we built THE COOLER. Follow this link to see an instructable. Once we had a cooler, brewing became a pastime of leisure. It was always a pleasure, but once we had a cooler, there was time on brewing day for other pleasures as well, free time for the brewery labourers, you might say. The trick is to get that wort from 70-something degrees to twenty degrees as soon as possible. Remember this one thing: Get the wort cooled down to twenty degrees as soon as possible. WITHOUT INFECTING IT. Then PITCH. You know about pitching? That’s what brewers call the seriously ritualistic act of adding yeast to the wort. Now we are making beer! Read on to see about yeast and other lively little critters.