30 rule

[Joe028]

Anyone know the source of this guideline of pitching temp + Fermentation temp = 30 degrees Celsius? Heard about it for hefewiesen yeast strains and I would like to read up on it from the original source a bit. Thanks

 

[Baron von BeeGee]

I've only heard it referenced with respect to Hefeweizen brewing, and I'm pretty sure the main place I read about it was Warner's German Wheat Beers (one of the better editions of that line of books IMO). I believe the basis is to control the production of esters and phenols in the initial phase of fermentation.

 

[EALynx]

I heard Jamil Zainasheff discuss it on the Jamil Show podcast located at www.thebrewingnetwork.com. Go to the archives section, then go to the Jamil Show. I think it was on the Weizen show dated 6-5-06.

Cheers,

ealynx

 

[Chris_K]

Jamil seems to be all over this "30 Rule" thing, but if you do look up a Brewing Netwrok show, check out the one from 6/11/06 with Dan Gordon. Around the 1 Hr 50 Min mark they talk a little about the 30 rule (and the "Brewery Catechism Book"), and Dan says that it doesn't make sense to pitch at a temperature that's several degrees different from where you propagated your yeast or what you're planning to ferment. I think Jamil's big discussion of his belief in the 30 Rule is on the Jamil show for 6/5/06