Do I cool in my fermentation vessel?

Aethelstan · Post by **Aethelstan** » Sat May 10, 2014 12:39 pm

I have my first boil going now which I will cool when it is done. Do I need to cool in the vessel I will ferment in, or do I cool it before transferring?

Cheers

crimsongarlic · Post by **crimsongarlic** » Sat May 10, 2014 12:43 pm

Cool before transferring is probably best. This is what I do.

You don't want to risk getting oxygen into the hot wort. Should be below 28°C to prevent oxidisation I believe.

Aethelstan · Post by **Aethelstan** » Sat May 10, 2014 12:50 pm

Thank you

Rick_UK · Post by **Rick_UK** » Sat May 10, 2014 8:23 pm

I have done it both ways many times (fnaar, fnaar!) and can't say it matters TBH. Hot filling a plastic FV can discolour it quite a bit though so you may need to replace it sooner if you cool in the FV. For some reason I always preferred to get it straight in a sealed sterile FV as there seemed less risk of infection. I use an immersion chiller now so it's not an issue anymore.

On another note I have not noticed any improvement in clarity or chill haze since moving from natural to forced cooling - contrary to popular mythology!

Francois · Post by **Francois** » Sat May 10, 2014 11:10 pm

I cool in boiler with immersion chiller then run off into fv at a decent height to get some oxygen in there for the yeast. It's worked for me thus far!

Aethelstan · Post by **Aethelstan** » Sat May 10, 2014 11:12 pm

I cooled it in the boiler by sitting it in a sink of water but this feels inherently risky. I reckon I could make a decent cooler using microbore copper in a coil, but if I am going to do that I will buy a bigger mash tun and boiler first. This was a 1 gallon trial run before I buy any kit.

Chicken Dipper · Post by **Chicken Dipper** » Sun May 11, 2014 8:00 am

It depends on how you cool. Don't worry about oxydisation as you need oxygen for the yeast to work in its early stages. It only after it's got going that you need to worry.

crimsongarlic · Post by **crimsongarlic** » Mon May 12, 2014 9:15 am

Aethelstan wrote:I cooled it in the boiler by sitting it in a sink of water but this feels inherently risky.

I do this and have never had any problems from it. I make sure I have lots of blocks of ice to feed into the sink to keep the water as cold as possible while gently stirring the wort. Works pretty quickly.

As it gets nearer to pitching temp I just stop the stirring and leave the lid on while it finishes cooling.

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Do I cool in my fermentation vessel?

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