Rheem’s ProTerra with LeakGuard is an Energy Star-certified water heater, and is 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 states. ProTerra is over 400% more efficient compared to standard electric tank-type water heaters available today, Rheem adds. Rheem. www.rheem.com