Fermentis Safale S-189 originated from the Hurlimann brewery in Switzerland. This lager strain's attenuation profile allows to brew a wide range of lager and pilsen beers. This lager yeast works at a wide temperature range between 9-22â (48.2-71. 6â ) but ideally between 12-15â (53.6-59 â). Highly flocculant.