Orea Z1 Flash Brew

Background & Concept

• Flash brew uses hot water to extract coffee directly over ice for a refreshing, high-clarity iced drink.
• The Orea Z1 (zero bypass) is ideal because it forces all water through the bed, allowing for a finer grind without channeling.
• A finer grind increases extraction, compensating for the shorter brew volume needed to maintain strength over ice.

Adjustments

• If the slurry height prevents adding the next pour, your grind is too fine; go slightly coarser.
• For a more intense base (e.g., for tonic or milk), reduce the ice to 80-90g.
• To increase acidity/intensity rather than sweetness, reduce total brewing water to 200-210g by cutting the final pour volume.

Expectations

• Expected drawdown time is between 8:30 and 10:00 minutes.
• Natural/fermented coffees are more soluble and may extract faster and produce higher TDS than washed coffees.