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Ale Yeast
Fermoale AY4
Attenuation: 84%
Best for: Ales, Pale Ales, IPAs, Brown Ales, Porters
Fermoale AY4 is designed for American and English ales, delivering a clean, neutral fermentation profile with high attenuation and strong flocculation for hop-forward beers.
Fermoale AY4 is a US-origin top-fermenting yeast selected for fast and efficient fermentation. It produces a clean, neutral profile with low diacetyl, allowing both malt and hop character to express clearly.
Its high attenuation supports drier finishes, while strong flocculation ensures rapid sedimentation and reduced conditioning time. It is particularly well suited to pale ales, IPAs, and other hop-forward styles where clarity and balance are essential.
| Specification | Value |
|---|---|
| Yeast strain | Saccharomyces cerevisiae |
| Yeast origin | US |
| Apparent attenuation | 84% (high) |
| Fermentation temperature | 16-23°C |
| Flocculation | High |
| Alcohol tolerance | 11-2% ABV |
| Total esters | Low |
| Sulphur notes | Low |
| Phenolic notes | Negative |
| STA-1 | Negative |
