New to BIAB, concerns over hob power, batch size & boil time

Post #1 made 12 years ago
Hey,

I've never brewed BIAB before but looking to start. I have been given a stainless steel pot which is about 20L in size (photos for context: http://imgur.com/a/pRV9V#0 )

Firstly, I filled this with 15L cold water (just a guess as to a sensible amount to use) and on our biggest gas ring on the kitchen stove the pot took exactly 1 hour to come to a boil. On top of this, with the makeshift lid removed (tinfoil!) the hob only managed to maintain a gentle boil, not the aggressive type I've seen on BIAB videos on YouTube. The question is: is this kitchen hob setup feasible for BIAB?

Secondly, considering the 20L pot, what would be a recommended batch size for a first attempt? Would 15L be suitable, taking the grain amounts and hot break into consideration? I'm wondering whether there is a standard size I could go for in this kind of range, which has a large number of pre-existing recipes using the right measurements.

Thanks!

Post #2 made 12 years ago
do_you_realise,

Take a look at the information in this section of the forum. It can be done this might help?

Stove-top BIAB (also known as Mini-BIAB)

http://www.biabrewer.info/viewforum.php?f=23
Last edited by BobBrews on 01 Nov 2013, 02:10, edited 2 times in total.
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Post #3 made 12 years ago
Welcome dyr, yep, you do want a good rolling boil with the lid off.

There probably is some good info over there on the link Bob give you, but take notice that the two by Ralph has been locked and is considered as extreme brewing; http://www.biabrewer.info/viewtopic.php ... 100#p28670

Generally speaking, a 20 L pot can produce 10 L of beer, but let's take a look at your recipe first and someone will advise you, okay? There is a dilution you can do, if done properly.

Looking forward to hear back from you.

:peace:
MS
    • SVA Brewer With Over 100 Brews From United States of America

Post #4 made 12 years ago
Alright, thanks. Recipe-wise I'm torn between doing something exciting (I have a few bags of Motueka hops in the freezer which I'm dying to use in some kind of exciting IPA type concoction, plus a random bag of Chinook for some reason) or to stick to something really simple for my first brew.

If I was to go for something simple I'd probably also want something relatively quick to condition too, and then I can work up to ones with more of an investment in terms of time and effort once I've got the basics down and something simple but decent to drink. Would you have any suggestions by any chance, considering my kettle size? I don't necessarily need to go about diluting, 10L is fine for first attempt (and less daunting a task to bottle! ;) ) - Maybe something which uses Chinook hops?

Post #6 made 12 years ago
I got a recipe recommendation from the recipes section, accidentally followed up in there (http://www.biabrewer.info/viewtopic.php?p=34014#p34014) which I meant to do here. Copy-pasted below:

Alright, I've had a basic APA recommended to me over in the Recipes thread. I downloaded the pre-populated BIABacus spreadsheet they linked me to and changed the following:

Kettle shape: 27cm diameter, 37cm height
Desired volume into fermentor: 10L

From that it gave me the following grain bill:

Maris Otter - 2033g
Munich 1 - 407g
Cara Amber - 203g

For this I've ordered the closest matches from my preferred online shop:

Maris Otter Pale Malt Crushed 2kg
Cara Munich Type I Malt (crushed) 500g (I will probably just put all of this in, no use having 93g of a speciality grain knocking around... or is there?)
Cara Amber (crushed) 500g (obviously I can save some of this for a future brew)

And I'm going to substitute the Chinook hops for the Amarillo listed in the file. How can I put this into the spreadsheet? Is it clever enough to recalculate based on AA percentage?

If there are any glaring errors here I'd be grateful to be educated :) thanks!

Post #7 made 12 years ago
DYR - Basically you populate the left hand side with the info that you are copying, and if you are not changing anything, then just use what it states in "what you will use" (right hand side).
If you want to make changes to grain or hop, then populate the right hand side with that information and it will auto adjust based on the original recipe.

Easiest thing to do though is post your completed BIABacus file into the "use this thread to convert recipes to suit your equipment", and others can take a look.
G B
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Post #9 made 12 years ago
Hi MS,

I hadn't, but that's a great idea. Is there a recommended manufacturer or model? (I'm in the UK so might be tricky to find, I struggle for example to find well-priced stock pots here (hence the 20L hand-me-down) which seem ten a penny in the US!)

Cheers.
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