Energy Star Qualified. Reduce water heating costs up to 73% compared to a standard electric water heater. Dual Voltage Capable. Select from Efficiency, Hybrid, or Electric modes to match heating requirements to environmental conditions and hot water demand. Vacation mode reduces operating costs and provides freeze protection. Electronic User Interface. The compressor transfers heat to the water while dehumidifying and cooling the ambient air. Washable air filter is easily removed for routine cleaning. 10-Year Limited Warranty.