K.1 Voss Kveik is a multi-strain yeast handed down directly from Sigmund Gjernes’s farm in Voss, Norway. Unlike lab isolates, it preserves the full depth of a traditional, complete culture.
During propagation, Kveik Yeastery carefully removed lactic acid bacteria and other unwanted microorganisms—while maintaining the natural balance and synergy of the original yeast strains.
K.1 Voss Kveik offers a reliable, energy-efficient solution. It’s perfectly suited for breweries that ferment without active temperature control or those simply looking to cut costs. Even in the height of summer, it ensures fast, clean, and consistent fermentation.
The bonus? A 300g pouch of K.1 Voss is enough to ferment 10 hectoliters of beer.
Heat Tolerance and Fermentation Efficiency of K.1 Voss Kveik
| Features | Advantage for the brewery |
| Temperature range : 15 – 40 °C | Even attenuation and sensory stability, even without glycol or refrigerated cellar. |
| Rapid fermentation kinetics | Final density reached in 36 to 72 h, which speeds up vat rotation. |
| Bacteria-free, multi-stage aromatic synergy | Balanced notes of citrus zest, stone fruit and light orange. |
| High tolerance to ethanol and osmosis | Effectively ferments strong ales and sour fruit beers, where monocultures can fail. |
Temperature benchmarks & recommended beer styles
| Target temperature | Beer style | Technical Justification |
| 20 °C | Blonde Malt | At this low temperature, ester production remains moderate. The result is a clean, neutral profile, ideal for enhancing pale and lager malts. |
| 28 °C | Pale Ale Hazy modern | Moderate heat accentuates the citrus and tropical fruit aromas of the yeast blend – perfect with beers rich in Citra, Mosaic or Nelson Sauvin hops. |
| 35 °C | IPA West Coast | The citrus zest remains clean; the bitterness seems softer and rounder than the calculated IBUs, as the slight yeast sweetness balances the hoppy attack. Brewing below 67°C produces a dry finish (DF ≈ 1.010-1.012), for a hybrid profile between West Coast and New England. |
| 40 °C | Kettle Sour fruity | At this high limit, the culture ferments cleanly in ≈ 36 h; bright citrus esters perfectly complement a kettle-acidified must and highly acidic fruit additions. |
Recommendations for use :
- Seeding rate : 30 g/HL
- Ventilation : A single dose of oxygen at 8-10 ppm is sufficient. The robustness of the crop means that no additional oxygen is needed.
- Free temperature rise : No need to worry about letting the ambient temperature rise naturally. The yeast mixture remains aromatically stable, even in the event of a rapid rise.
- Packaging : Cold crash or centrifugation as usual. The kveik flocculates efficiently once the final density has been reached.
Strategic assets for the summer season :
- Energy savings : Less demand on the chiller = lower operating costs during peak periods.
- Production continuity : Allows brewing all year round, even without an air-conditioned cellar.
- Speed to market: Rapid fermentation facilitates seasonal outings, ideal for tourism and summer events.
K.1 Voss Kveik in a nutshell :
K.1 Voss kveik is a bacteria-free multi-strain yeast. It turns high temperatures into a real operational advantage. By matching each beer style to a precise fermentation temperature, breweries can guarantee quality, speed up throughput and reduce energy consumption during the hottest weeks of the year.
Skål ! 🍻