Another video in a series on measuring various variables that affect all grain brewing, this video goes into detail on determining evaporation losses within a mashtun during a mash. This information is useful for beer recipe design by increasing the total amount of brewing water required to account for loss due to evaporation so that your brew day wort volumes align with expectations.
Other videos in this series:
Grain Absorption Rate: https://youtu.be/oqdtgrQSC_s
Hops Absorption Rate: https://youtu.be/PDQeRuBlAvA