The boiled water (100oC) is introduced to the right temperature for the yeast to function as 10 - 15oC. This temperature is determined by the sort of yeast and the kind of beer. Val grew up in Portland, Oregon but moved to Oahu on the whim back again in 2013. https://sai-gon82581.dm-blog.com/30320932/the-greatest-guide-to-sai-gon