GY128 British Haze GigaYeast

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One of the most widely used yeast strains for New England IPA styles.  A slightly sweet finish and light, fruity flavour provides the perfect canvas for hazy beers as well as traditional, malt-forward ales.  Beers fermented with this strain will finish with a pronounced body and a soft mouthfeel.

Attenuation Medium Gravity*

  • 71 - 75%

Attenuation High Gravity*

  • 71 - 75%

Temperature Range†

  • 65 -74F (18-23C)


    • Medium/High

    Representative Styles:

    • New England IPA
    • American IPA
    • English IPA
    • Bitter
    • Brown Ale

    * Attenuation was measured after 8 days with Ale yeast at 70˚F and Lager yeast at 50˚F. Medium Gravity is 14˚ – 16˚Plato. High Gravity is 23˚- 25˚Plato.

    † The working temperature range represents the range at which fermentation for a given strain produces a typical attenuation- not necessarily the ideal temperature for your particular beer style. As a rule of thumb, start ale yeast fermentation at 68˚ – 72˚F and then lower or raise temp as desired. Lager Yeast are typically fermented at 45˚ – 58˚F. If desired, Lager Yeast can be given a “hot start” at 65-68˚F and then lowered to the primary temperature after active fermentation begins (10-20hrs).

    GigaYeast laboratory is still gathering data on many of their strains. Information provided here may change some in the future. Please contact us at if you need more info. on a particular strain.