Rheem’s ProTerra Energy Star-certified water heater is more eco-friendly than ever at up to 4.0 UEF, Rheem states. The ProTerra’s compact design makes it an ideal replacement for the home’s smallest spaces. The system is available in 40, 50, 65 and 80 gallon sizes to support various hot water needs, and the ProTerra with LeakGuard model is now the industry’s only hybrid water heater with built-in leak detection and auto-shutoff that limits water loss from the tank to no more than 20 ounces, Rheem adds. www.rheem.com