The Rheem XE38S06ST45U1 is a 38-gallon short electric water heater designed for efficient and reliable performance in homes with limited space. Featuring dual 4500-watt copper heating elements, it delivers a Uniform Energy Factor (UEF) of approximately 0.92, ensuring energy-efficient operation. The first-hour rating (FHR) is approximately 33 gallons, providing ample hot water for typical household needs. The unit's short profile makes it ideal for installations in areas with height restrictions. Backed by a 6-year limited warranty on the tank and parts, plus a 1-year in-home labor warranty, this model combines durability with peace of mind.