The smartest, quietest and most efficient water heater on earth features a hybrid heat pump design making it 4x more efficient than standard electric water heaters with an estimated energy cost savings of $4,500 over 10-year. Smart Rheem Performance Platinum 80 Gal. Hybrid Electric Water Heaters feature integrated Wi-Fi connectivity for important mobile alerts, like Water Leak Detection for potential added savings. Plus, its a great value with a 10-year warranty and 1-year in-home labor warranty.