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Old 01-04-2013, 11:57 AM   #1251
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Question , why do you put what looks like a some type of metal between the kettle and the burner? Does this create an even better balanced heating surface?
heat shield to prevent burning the valve handle and sight glass
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Old 01-04-2013, 07:52 PM   #1252
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imagine trying to hoist a bag of wet grain when making several hundred barrels at once (1 barrel = 31 US gallons). Also consider that most micro breweries are getting close to 90% efficiency (or better). A guy in our homebrew club works for one of the micro breweries in Atlanta. They use grain measured in the several hundred to thousand pounds... that's dry weight. doing BIAB on that scale would BE A huge pain in the ass
Point well taken, but how the microbreweries getting 90% efficiency then?

By the way I have finality finished reading the whole thread and I have other questions what I will post later. Lots of good information here. I like the first page and the page that refers to timed efficiencies in like 15 minute increments.
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Old 01-05-2013, 03:29 AM   #1253
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Question: I have been doing BIAB for the last 6 months (10 batches or so) & now that its cold as hell outside in New England, I was wondering how to pull this off indoors. My thought was to do the mash in a 7 gallon pot I have with as much water as possible, then split the wort into 3-gal batches in two separate pots to boil on a stove top. What do I need to consider here? Would roughly splitting the hop additions work? I guess I'd need to consider the boil off from two separate vessels instead of one so may need to add water at some juncture of the process. Then just blend after the boil.

Half of me just says suck it up & brew outside to save the hassle, or just brew extract during the winter, but I'd hate to do that if there were alternatives. I don't mind the cold temps for the brewing part - its the cleaning in freezing water that's a bear!

Ideas?
I did a half dozen split batches in two 5 gallon pots on the stove without an issue before going to a 13 gallon pot outdoors (or in the garage).
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Old 01-05-2013, 04:55 AM   #1254
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This question has probably been asked before but I'm lazy and don't want to look. How do I know how much water I'm going to need? I'm doing a 6 gallon batch, and have about 14 pounds of grain. This is my first time doing BIAB. I'm thinking of mashing with 8 gallons of water, I typically loose about a gallon in a 60 minute boil. Will I loose a gallon to the grain absorbing it also, or will it be more? Thanks in advance,

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Old 01-05-2013, 10:20 PM   #1256
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Did a big IPA/IIPA today with BIAB... I think my pot was way too small. I only got a 70% efficiency instead of my normal 80-85%. Lesson learned...

Time to get a bigger pot! Woohoo!

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Old 01-05-2013, 10:58 PM   #1257
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Did a big IPA/IIPA today with BIAB... I think my pot was way too small. I only got a 70% efficiency instead of my normal 80-85%. Lesson learned...

Time to get a bigger pot! Woohoo!
If your using the same pot as always then you low efficiency wouldn't be caused by the pot.
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Old 01-05-2013, 10:59 PM   #1258
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If your using the same pot as always then you low efficiency wouldn't be caused by the pot.
Unless he meant that he had to mash thicker than normal to get it to fit? That could cause decreased efficiency with BIAB.
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Old 01-05-2013, 11:35 PM   #1259
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Unless he meant that he had to mash thicker than normal to get it to fit? That could cause decreased efficiency with BIAB.
True. I just assumed he'd done recipe before, I stand corrected!
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Old 01-06-2013, 12:23 AM   #1260
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Yeah, that's exactly what happened. I did a 4.5 gallon mash with about 20 pounds of grain... In a pot just a bit too small. Normally my batches are about 10-14 pounds. Too thick this time.

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