Brews 18.1 to 20.9 gallons of perfect coffee per hour. Unique design assures extremely low evaporation loss to maintain the brew at its flavorful peak. Half-batch option available. Large water tank over 20 gallons. Draw off hot water during brewing cycle without affecting coffee quality. Half-batch option. Top mounted components for ease of service. All stainless steel construction. Single service International electrical configurations available. UL listed. NSF approved.