The only Turbo to use when the ambient temperature is above 91 F (33 C). Delivers excellent quality alcohol in hot conditions. Heat Wave is also the only yeast we recommend for `stacking `. Up to a 200 litre volume can be fermented using 8 sachets (providing the start liquid temperature and air temperature are both 68 F). Characteristics: Excellent quality alcohol in hot conditions. Max Sugar Quantity: 13.2 lbs (6 kg) Ideal Water Start Temp: 68 F (20 C) Ferment Temp Range: 68 - 104 F (20 - 40 C) Ideal Ferment Temp: 86 F (30 C) Approx. Ethanol %: 13.0%