The Smart Hybrid Electric Heat Pump Water Heater, Dual 4500 Elements, the Highest efficiency, Top & Front Water Connections for installation versatility, Zero design on sides and back fits into more spaces, Quietest operation at just 45 dBA, iCOMM; connectivity with built-in WiFi and Bluetooth, Integrated leak detection and compatible with accessory automatic water shutoff valve, Enhanced ducting capabilities, Smart anode that adapts to local water conditions to protect and extend the life of the water heater and alerts when it needs to be replaced, ENERGY STAR; for many state and local utility rebates, NEEA Tier 4 , 10 Year Warranty on Water Heater & Parts, 1 year Labor Warranty.