Author Topic: SafAle US-05 Optimum temperature range changed on spec sheet  (Read 9005 times)

Offline Richard

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SafAle US-05 Optimum temperature range changed on spec sheet
« on: February 28, 2017, 03:50:06 AM »
I have an old (Oct 2015) spec sheet for US-05 that states the optimum fermentation temperature range is 59-72 F. I just downloaded a new one (Nov 2016) and it says the optimum range is from 64-82 F. This is a substantial change. Did the yeast change at all, or did someone just re-write the data sheet? Everything else on the sheet seems the same, so my guess is that someone re-defined the optimum range and that the yeast is the same. Why would they do this? What would cause them to re-define what is optimum? Have people's tastes changed in the course of a year?

-GF

Offline Andy Farke

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Re: SafAle US-05 Optimum temperature range changed on spec sheet
« Reply #1 on: February 28, 2017, 04:01:45 AM »
Fascinating! I would contact the company...it's possible they either have revised their specs, or maybe it's even a typo. I wouldn't imagine that 82F is terribly great for most beer styles.
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Offline Mythguided Brewing

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Re: SafAle US-05 Optimum temperature range changed on spec sheet
« Reply #2 on: February 28, 2017, 06:15:59 AM »
Must be a mistake on the English-version PDF of the US-05 stats sheet on the Fermentis website.  The English version does indeed say "fermentation ideally at 18-28°C (64-82°F)", but the French and Spanish versions have it at 15-20°C (59-68°F).

Offline Richard

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Re: SafAle US-05 Optimum temperature range changed on spec sheet
« Reply #3 on: March 02, 2017, 11:46:17 PM »
I contacted Fermentis and they acknowledged that this is a mistake and will be correcting it "very soon".

Offline HoosierBrew

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Re: SafAle US-05 Optimum temperature range changed on spec sheet
« Reply #4 on: March 03, 2017, 12:00:58 AM »
Yeah, regardless of the stated range, several people here (myself included) will attest that S05/1056/001 ferments well in the upper 50s. It's rumored to be descended from a lager strain.
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Offline mabrungard

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Re: SafAle US-05 Optimum temperature range changed on spec sheet
« Reply #5 on: March 03, 2017, 02:49:00 AM »
Upper 50's? It will effectively ferment into the lower 50's.
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Offline HoosierBrew

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Re: SafAle US-05 Optimum temperature range changed on spec sheet
« Reply #6 on: March 03, 2017, 12:52:41 PM »
Upper 50's? It will effectively ferment into the lower 50's.


Yeah, I've actually fermented it more into the mid 50s, Martin. Anecdotally , I've heard lower. It definitely wants to ferment!
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Offline dmtaylor

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Re: SafAle US-05 Optimum temperature range changed on spec sheet
« Reply #7 on: March 03, 2017, 01:11:42 PM »
I've done 55 F.  It gets more peachy.
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Offline majorvices

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Re: SafAle US-05 Optimum temperature range changed on spec sheet
« Reply #8 on: March 03, 2017, 01:46:22 PM »
Upper 50's? It will effectively ferment into the lower 50's.

I once had a valve fail on a glycol loop (it stayed open) and crashed a fermenting batch of 1.090 beer to 45 degrees on US-05 and the yeast was chugging along like nobodies business. It eventually warmed up into the lower 60s on it's on once I got the glycol shut off. Attenuation was right where I wanted it and taste was clean, no off flavors at all.

Offline HoosierBrew

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Re: SafAle US-05 Optimum temperature range changed on spec sheet
« Reply #9 on: March 03, 2017, 01:50:17 PM »
Upper 50's? It will effectively ferment into the lower 50's.

I once had a valve fail on a glycol loop (it stayed open) and crashed a fermenting batch of 1.090 beer to 45 degrees on US-05 and the yeast was chugging along like nobodies business. It eventually warmed up into the lower 60s on it's on once I got the glycol shut off. Attenuation was right where I wanted it and taste was clean, no off flavors at all.


I thought I remembered a story like that, Keith. Wow! Kinda bears out Mark's theory on it being used in American lagers at some point.
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Offline Lazy Ant Brewing

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Re: SafAle US-05 Optimum temperature range changed on spec sheet
« Reply #10 on: March 04, 2017, 03:16:14 PM »
I'm glad to hear about the lower temperature ranges for US 05 and the good results.  I've been fermenting from 64 F to 68 F.  Now, I'll try it a b it lower.

Thanks
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Offline Beachside

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Re: SafAle US-05 Optimum temperature range changed on spec sheet
« Reply #11 on: March 06, 2017, 04:36:35 AM »
I fermented US-05 @ 59 with no D-rest and didn't pick up any peach flavors. Sierra via Ballantine via Germany? IDK, but this yeast is one of my favorites.

Offline Srojo724

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Re: SafAle US-05 Optimum temperature range changed on spec sheet
« Reply #12 on: March 07, 2017, 04:29:58 PM »
US-05 is definitely some stuff yeast, I almost prefer the taste compared liquid yeast.

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Offline Visor

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Re: SafAle US-05 Optimum temperature range changed on spec sheet
« Reply #13 on: March 07, 2017, 05:36:07 PM »
I did a mid 60's APA a couple weeks ago at 50 degrees with US-05, it was the only time I've ever had such vigorous fermentation that it overflowed the fermenter, with 1 1/2 gallons of headspace in a 7 1/2 gallon Fast Ferment. I'm thinking 05 is some pretty resilient stuff.
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Offline santoch

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Re: SafAle US-05 Optimum temperature range changed on spec sheet
« Reply #14 on: March 09, 2017, 03:05:11 AM »
In my honest opinion, just ignore the "recommended temp ranges" on the yeast packages.
If you are unsure of a good fermentation temp you want for your beer, just look around the forums and see what folks have been recommending for the yeast/style you are brewing.

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