AdrianDBW
I'm going to ask Santa for a BIAB bag and give this a go after Christmas.

I realise I can calculate the efficiency after I've done the brew, but what sort of efficiency am I likely to see using BIAB on my first go?

I'm just trying to work out how much grain I'll need while trying not to get too many or too few IBUs.
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Clibit
AdrianDBW wrote:
I'm going to ask Santa for a BIAB bag and give this a go after Christmas.

I realise I can calculate the efficiency after I've done the brew, but what sort of efficiency am I likely to see using BIAB on my first go?

I'm just trying to work out how much grain I'll need while trying not to get too many or too few IBUs.


Everyone's first go is a bit of a stab in the dark. I always get at least 80% now but I crush it very fine. If you are using pre-crushed grain I would imagine your efficiency wont be wildly different to your current set-up. But you will have to wait and see I reckon.
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HisDudeness
65-70% is a probably a good estimate for your first attempt, quite easy to adjust if you overshoot that by liquoring back at the end. There are calculators online to work out the dilution required to adjust OG. 
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GHW
Yeah I always got pretty close to predicted og when I biabed so 70-75% achievable.
Will depend if you
A) recirculate (needs a pot with a tap)
B) sparge (dunk or otherwise)
C) other stuff like crush which might be out of your control if you're buying crushed...

But even with full volume mashing you can get good efficiency. If it's low you can compensate next time with additional malt, it won't impact costs etc that much
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Pesho77
if you come up low on SG you can add DME / corn sugar or even small amounts of table sugar maybe 100 - 150g per 5G.

 Pesh
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AdrianDBW
Cool, thanks everyone. I was going to BIAB in my adjustable urn, and then sparge with water from another pot- but I could recirculate also as it does have a tap- or even both!!

If I work with 65% then I've got some DME 'in stock' which I can chuck it in to make the OG up, or if the OG is higher than expected then I'll just have to not drink it as quick.

I don't have a mill (yet) so I'll be buying pre-crushed.
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Pesho77
you can also do part grain or all grain kits, part grain is a great introduction to sparging.

 Pesh
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Clibit
Pesho77 wrote:
you can also do part grain or all grain kits, part grain is a great introduction to sparging.

 Pesh


I get better efficiency with BIAB, 80%+ (both full volume or with a sparge), than using a mashtun (around 75%). Presumably because of the BIAB fine grain crush. Some of the online grain sellers will crush fine if you specify.
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