From: On Demand

The R75Lsi delivers continuous hot water on demand up to 7.5 gallons per minute. The unit features a redesigned commercial-grade heat exchanger, an integrated condensate collector, an integrated digital temperature controller, and direct electronic ignition with no pilot light. The combustion unit is sealed, so it doesn’t use interior combustion air. Two units can be connected together without a control board. The whole-house unit measures 10 inches by 14 inches by 26 inches and weighs 46 pounds. The temperature can range from 98 to 140 degrees. Energy factor: 0.82. 678.829.1700.