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2

Despite the fancy scientific answers, the correct answer is you brew a few times and measure how much you start and end with.


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What you are actually looking for here is not the amount of evaporation you will be working with it is the amount of vaporization. This is a technical but important distinction the overwhelming amount of water loss is from the boil not from evaporation. Now this can be calculated but unfortunately I won’t be able to give you a magic bullet for this there are ...


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I've not seen a calculator that's reliable. Could be calculated but too many variables: surface area, altitude, actual wort temperature etc. It's much easier to just do a boil test to establish your brewhouse boil off rate. For example my brewhouse boil off rate with a keggle is 1 gallon an hour at modest rolling boil. So for 90 min boil, 12 gallon batch I ...



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