By Aaron Brussat
Have you ever wondered why you should control the temperature of your fermenting beer? Any humble brewer will tell you, “I don’t make beer; I make wort. Yeast makes beer.” While that is true, one of the final steps in brewing a batch is also the most vital to control: fermentation. Yeast health, pitch rate, and temperature will all affect the way your beer tastes; we’ll just focus on temperature here. While most commercial breweries have glycol-jacketed fermentors they can control to the degree, homebrewers are often left to their wits to finagle ways to keep temperature in check.