12 cup automatic coffee brewer with two warmers brews 3.8 to 7.5 gallons (14.4 to 28.4 litres) of perfect coffee per hour. model is space-saving 8.5″ (21.6 cm) wide. all stainless steel construction. hot water faucet pourover feature on all models. splashgard funnel deflects hot liquids away from the hand. international electrical configurations available. electrical: model 15 requires 2-wires plus ground service rated 120v, single phase, 60 hz.model 20 requires 2-wires plus ground service rated 120v, single phase, 60 hz.model 35 requires 3-wires plus ground service rated 120/208 or 120/240v, single phase, 60 hz plumbing: 20-90 psi (138-621 kpa). Machine supplied with 1/4″ male flare fitting other: based upon incoming water temp of 60f (140f rise) per 1/2 gallon brew time of 4 minutes.models listed as 120/208v or 120/240v must be connected to 208v or 240v electrical service respectively. Please refer to the installation manual.