[clibit]

Four years on from the OP, the Fermentis data sheet still has 64 - 82F.

Did they decide it was upwardly flexible, or never get round to correcting it?

[denny]

Four years on from the OP, the Fermentis data sheet still has 64 - 82F.

Did they decide it was upwardly flexible, or never get round to correcting it?

I suspect the latter, but have no evidence.

[clibit]

Four years on from the OP, the Fermentis data sheet still has 64 - 82F.

Did they decide it was upwardly flexible, or never get round to correcting it?

I suspect the latter, but have no evidence.

I think so too. I wonder how many have been fooled into fermenting at 80F?! 😃

[denny]

Four years on from the OP, the Fermentis data sheet still has 64 - 82F.

Did they decide it was upwardly flexible, or never get round to correcting it?

I suspect the latter, but have no evidence.

I think so too. I wonder how many have been fooled into fermenting at 80F?! 😃

Something I've decided after years of dealing with yeasty companies is that temp ranges seem to be based on performance, not beer quality

[Fire Rooster]

Their current web site ideal range is 64-82f.
https://fermentis.com/en/product/safale-us-05/

Their current "technical data sheet" link has an ideal range of 64.4-78.8f.

The same discrepancy was found on their other yeasts.

The US-05 packets I have with a date 09/2023, has a temperature range of 53.6-77f.
An ideal range of 59-71.6f.

According to Fermentis's own currently found temperatures (above)
US-05 has ranges 53.6 - 82f, that's a mid range of 67.8f.

[Cliffs]

with the increased availability of Bry-97 I am having trouble understanding why brewers still use us-05. Bry-97 seems to do everything a little better than US-05

[Fire Rooster]

with the increased availability of Bry-97 I am having trouble understanding why brewers still use us-05. Bry-97 seems to do everything a little better than US-05

Can't speak for others, got a good deal on S-04, US-05, and it had years till expiration.
Focusing on procedures, malts, and hops, haven't focused on yeasts much, yet.
When S-04 & US-05 is depleted, it will be replenished with different yeasts.

[jeffy]

with the increased availability of Bry-97 I am having trouble understanding why brewers still use us-05. Bry-97 seems to do everything a little better than US-05

My local store doesn't carry that brand.  I have to mail order BRY-97 and Diamond Lager yeast.

[Steve Ruch]

with the increased availability of Bry-97 I am having trouble understanding why brewers still use us-05. Bry-97 seems to do everything a little better than US-05

Lots of people get a much longer lag time with 97 and it makes them nervous.

[denny]

with the increased availability of Bry-97 I am having trouble understanding why brewers still use us-05. Bry-97 seems to do everything a little better than US-05

Lots of people get a much longer lag time with 97 and it makes them nervous.

Which I don't understand.  I get fermentation in 24-36 hours with it.

[Megary]

I use BRY97 all the time and it usually kicks off in about 8 hours, HK in about 36.  2.5 gal batches, 1 full pack.  Data point.

[Iliff Ave]

I get about 16-18 hours with 05 and about 24-36 with 97 like denny mentioned. I don’t have a preference and usually go with 05 because it’s easier and cheaper for me to get.

[Fire Rooster]

Based on recommended pitch rates on packets=

US-05 one packet = 5.2 gallons to 7.9 gallons

BRY-97 one packet = 2.9 gallons to 5.8 gallons

*US-05, 11.5 gram packet (pitch rate 11.5g in 20-30 Liters)
*BRY-97, 11 gram packet (pitch rate .5 - 1g per Liter)

This would explain longer lag times using one packet BRY-97 for larger batches,
and shorter lag times in smaller batches. One US-05 yeast packet covers more
gallons per packet than BRY-97, according to their own stated pitch rates. Which
also accounts for longer lag times using BRY-97 vs US-05, in same sized batches.

This is if both yeasts have the same viability, and I'm not sure how lag times
affect the fermentation/beer.

[BrewBama]

I use Lallemand products, and specifically Bry-97, a lot. I prefer to use the pitch rate calculator on the Lallemand site vs the generic package recommendation because it takes into account the strain, volume, and specific gravity of the wort.  By using the pitch rate calculator recommendation I get very consistent lag times with Bry-97 across the spectrum of wort density.


Sent from my iPad using Tapatalk

[Fire Rooster]

I use Lallemand products, and specifically Bry-97, a lot. I prefer to use the pitch rate calculator on the Lallemand site vs the generic package recommendation because it takes into account the strain, volume, and specific gravity of the wort.  By using the pitch rate calculator recommendation I get very consistent lag times with Bry-97 across the spectrum of wort density.


Sent from my iPad using Tapatalk

What is your usual gallons per batch ?
Do you use 2 packets for 5 gallons ?
Thanks