Bunn Model U3 Automatic Twin Electric Coffee Urn- Brews 16.3 to 18.8 gallons of perfect coffee per hour. Unique design assures extremely low evaporation loss to maintain the brew at its flavorful peak. Large water tank holds 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. Measures 32.4" H x 34.5" W x 21" D. Brewing capacity based upon incoming water temp of 60F. Models listed as 120/208V or 120/240V must be connected to 208V or 240V electrical service respectively. NSF approved for commercial food service use.