Single coffee brewer brews 5.1 to 11.4 gallons (19.3 to 43.2 litres) of perfect coffee per hour. brews 1/2, 1, or 1-1/2 gallon (1.9, 3.8 and 5.7 litre) batches. adjustable bypass ensures perfect coffee regardless of batch size. hot water faucet does not affect brew level. electronic timer ensures fast set up and accurate brew levels. electronic grinder interface instructs grinder on exact amount of coffee for selected brew batch size. 1.5gpr portable server (included) has a patented safety-fresh brew-through lid with vapor seal and spill protection. splashgard funnel deflects hot liquids away from the hand. international electrical configurations available. electrical: 120v models require 2-wires plus ground service rated 120v, single phase, 60 hz.120/208v or 120/240v models require 3-wires plus ground service rated 120/208v or 120/240v, single phase, 60 hz. Plumbing: 20-90 psi (138-621 kpa). Supplied with 1/4″ male flare fittings. Other: based upon incoming water temp of 60f (140f rise).models listed as 120/208v or 120/240v must be connected to 208v or 240v electrical service respectively. Please refer to the installation manual.