A01 House
Liquid Ale yeast from Imperial Yeast.
Lab
Imperial Yeast· Ale · Liquid · A01
Imperial Yeast· Ale · Liquid · A01Specs
Attenuation
73–75%
The share of sugars the yeast ferments out. Higher attenuation means a drier, stronger beer.
Optimal temp
17–21°C
63–70°F
The range where this strain ferments cleanly, without throwing off-flavors. Most brewers pitch near the low end.
Flocculation
High
How readily the yeast clumps together and drops clear once fermentation winds down.
Alcohol tolerance
≈10% ABV
The rough ABV ceiling where the yeast stresses out and stops fermenting.
Genetic traits
Phenolics
POF−
Ferments clean
Phenolically clean (POF-negative). No clove or spice, so malt, esters, and hops come through unmasked. The norm for American and British ales and most lagers.
Diastatic
STA-1−
Not diastatic
Does not carry the STA1 (diastaticus) gene. It attenuates normally, with no diastaticus over-attenuation or gushing risk.
Same strain, other labs
Potential substitutes for A01 House
Usually used in
English IPAExtra Special BitterPale AleEnglish MildBitterStoutSweetBrown PorterIrish Red AleOatmealTropicalBritish Strong AleEnglish BarleywineOld Ale+23 more
Common questions
- What is the A01 House equivalent?
- OYL-006 British Ale I and 1098 British Ale — the same strain from other labs, the British Ale I (Whitbread) strain.
- What is A01 House's attenuation?
- 73–75% apparent attenuation.
- What temperature should I ferment A01 House at?
- 17–21°C is the recommended range.
- What beer styles is A01 House good for?
- English IPA, Extra Special Bitter, Pale Ale, English Mild, Bitter, Stout, Sweet, Brown Porter, Irish Red Ale, Stout, Oatmeal, Stout, Tropical, British Strong Ale, English Barleywine, Old Ale, Stout, Foreign Extra, American IPA, Black IPA, American Pale Ale, Red Ale, Robust Porter, American Stout, Winter Seasonal Beer, Imperial IPA, American Barleywine, Imperial Stout, American Strong Ale, Wheatwine, Stout, Irish Dry, Scottish Ale, Wee Heavy, Cream Ale, American Wheat Beer, Blonde Ale, American Amber Ale, American Brown Ale, Hazy IPA, and White IPA & California Common.
- What can I substitute for A01 House?
- WLP007 Dry English Ale Yeast, English Ale II, SafAle S-04, and WLP017 Whitbread II Ale Yeast.
Brew with A01 House
Build a recipe