The new Rheem XR90 extreme recovery gas water heater is a 29-gallon unit that delivers hot water in an expeditious manner. It has a first-hour rating of 90 gallons, meaning homeowners get three times the amount of hot water in an hour than what the tank actually holds. The unit costs 17 percent less to operate annually ($261 vs. $315 for a standard 50-gallon gas model). The XR90 has an Energy Factor of .70, exceeding the requirements of Energy Star Phase II.

Rheem. Circle 29