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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.

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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.

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  • 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 Sep 1 '18 at 22:56

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