I have made a Czech Pilsner using S-23 Yeast and had very good results fermenting in a small refrigerator. Since, I don't have that refrigerator any longer, is there a substitute yeast that doesn't require as low a temperature as S-23 while giving similar results? A yeast in the low 64F/17C would be ideal. I believe a substitute yeast would be a compromise, but I'm looking for options, as I really like this style. Thanks.

1 Answer 1


Lager yeasts generally need lower temperatures. They will also ferment at higher temperatures (they don't die), but the resulting beer may have serious off-flavors. I doubt that you'll get terrible off-flavors at 17C already, though.

In your case, where you only have to cover ~10C, I'd look into alternative methods of temperature control, for example, moving the fermenter to a basement (if you have one), putting the fermenter in a tub of cold water, or putting wet towels on / around the fermenter.

A quick web search will come up with other ideas for cooling, including some hardware that isn't as expensive as a fridge.

  • Beer is lagering, kegged in the frig. A quick taste it looks good, smooth with that Saaz hop on the finish. Should be ok, fermented around 62F with S-23 yeast.
    – Tony
    Commented Sep 1, 2018 at 22:56

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.