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The Eternal Hybrid™ GU100 water heater offers endless hot water and is Energy Star listed at 0.94 EF (energy factor). The water heater can support up to two simultaneous applications, such as running two showers or a shower and a dishwasher at the same time. According to the manufacturer, the unit can easily replace a traditional 50-gallon standard tank, freeing up valuable space in a home, and is compatible with traditional and retrofit recirculation systems to deliver instant hot water. Since the water heater operates on ½-inch gas connections, the installation is simple and quick, which saves the contractor time and the homeowner money. It has an all-stainless steel cabinet design. It offers on-demand hot water with 96 percent thermal efficiency. Features include 100 percent stainless steel heat exchanger with built-in reserve tank that eliminates the cold-water sandwich; dual activation, temperature and flow sensing; compatible with low-flow Water Sense fixtures; 2- or 3-inch PVC venting; reduced costs of installation materials; self-cleaning process that flushes out sediment to maintain efficiency and prolong product life; and user-friendly digital display to control temperature and view diagnostics.