Make the Right Choice: Key Considerations for Buying an Electric Water Heater In Illinois, electric water heaters come with Energy Factor (EF) ratings, which indicate how well they convert energy into hot water. A higher EF rating translates into lower energy costs and a smaller carbon footprint. Additionally, some units are equipped with smart features that can learn your household's usage patterns and optimize heating cycles, reducing wasteful energy consumption. https://forum.linuxcnc.org/cb-profile/pluginclass/cbblogs?action=blogs&func=show&id=8826