VG62-50T100-NV American Water Heater 50 Gallon Residential Gas High Efficiency Power Direct Vent Today’s homes demand more hot water than ever before, and the 96% efficient power direct vent gas water heater offers unprecedented levels of performance to meet the need. The 50-gallon heater exceeds the output of the 75-gallon atmospheric gas water heater. In fact, the fully condensing design is so advanced, it can deliver “continuous hot water for shower after shower”…a constant flow of over 4 gallons per minute. * Yet is easy to install, with height, diameter and installation requirements similar to standard power direct vent units.Completely surround by water in the tank, provides much greater heat transfer surface than standardstraight flue tubeOperates at 96% thermal efficiency, which saves money on operating costs compared to a standard80% efficient gas water heaterSpiral heat exchanger reduces lime scale from forming on water-side surfaces, which maintains energyefficiency over time