FERMOALE AY4 - American Ale Yeast

FERMOALE AY4

• Top Fermenting
• Suitable for the production of British and American Ales.
• Best Before Date:  30/11/25

Click here for Technical Data Sheet

Very versatile yeast of American origin for the production of American and English style Ale beers (eg. APA, IPA, Imperial / Double IPA, Imperial Stout, Imperial Porter, Brown Ale, American Barley Wine, etc.). It has an excellent attenuating capacity, a high fermentation speed and high flocculating. FERMOALE AY4 develops a neutral and clean aromatic profile with very low diacetyl levels.

Beer styles:  This is a very versatile yeast that can be used to brew a wide range
of American- and English-style ales, including pale ales (IPA, APA, EPA), brown ales and porters. 

Flavour & Aroma Profile:  Delivers light malty flavour notes with a touch of citrus. Esters are mild to give a balanced and clean, neutral finish with low diacetyl levels.

Performance and Application:  Medium attenuation and high flocculation and high fermentation speed

Brewing Properties:

• Yeast Strain:  Saccharomyces cerevisiae
• Origin of yeast strain: USA
• Apparent Attenuation: 84% | Medium
• Fermentation Temperture: 16-23°C 
• Flocculation:  High
• Alcohol Tolerance:  10 - 12% ABV
• Total Esters:  Medium
• H2S (Sulphur notes):  Low
• POF (Phenolic Notes):  Negative
• STA-1:  Negative
  

Dosage: 50 - 80g/hl of cool wort at 16-23°C / 61-73°F

Instructions
Direct:  It is generally recommended that active dry yeast is pitched directly
into the wort without prior rehydration. 

Rehydration: To rehydrate dissolve the dry yeast in sterile water or in wort at 16-
23°C / 61-73°F at a ratio of 1:10. Stir gently and leave for approximately 20 minutes. Gently stir again and add to the cooled wort in the fermenter.

To avoid yeast stress, ensure temperature fluctuations are minimal.