#### olie

##### Well-Known Member

- Joined
- Oct 9, 2017

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Ex: 5 gallon batch: boil 3 gallons of wort, end-up with ~2.5 gallons, add water to 5 gallons and/or 1.040

Looking at scaled-up systems -- like the turnkey 1 bbl systems from Spike, Blichmann and others -- I see that a 1 bbl system typically has 50 gallon boil kettle (same size for others). From that, I infer that they intend for me to boil 35-40 gallons of water to end up with 31 gallons (1bbl) of wort. (Maybe ~33, to account for trub and other loss at the end? Anyway...)

That made me wonder: well, that's really a

*two*bbl system then, isn't it? I mean, if I scale-up, and boil 30+ gallons of wort, then I'd add 30+ gallons of water to end up with 62-ish or 2bbls of beer.

*if I had a 20 gallon kettle and boiled to 16 gallons of wort, adding 15 gallons of water for a total of 31 = 1bbl...*

**OR**...Right?

Or is it the case that, at that size, the pros just boil the whole wort all at once?

It seems to me that the convenience of having half your wort-volume as pre-cooled water is a serious aid to wort-chilling and that would be a matter of economics, but maybe I'm over (or under?! ) thinking it.

**So that's my question:**When one makes 30+ gallons of beer at a time, is it typical to boil all the wort at once, or to do like we do at homebrew scale and boil half, then add water to top it off?

Thanks!

~Ted