The reason I warmed up the ethanol to 85 degrees in the tutorial was to expedite emulsification! It isn't needed at all, and actually cold is best. The reason I used a temp gun was when I was vaccum purging the final product I didn't want to start boiling off the volitile cannabanoids and terpenes. Again, it is not necessary to use heat, I did to speed things up. best method is to cold purge, but it takes a while. Hope this helps..