Earlier this year the Department of Energy (DOE) published a final ruling on the anticipated energy factor (EF) upgrades for residential water heaters. The new standards will take effect April 16, 2015 and are representative of the continued push for energy efficiency in the residential building market. Specifically, the standard states that water heaters manufactured on or after April 16, 2015 must meet the new EF requirements. The DOE has projected the new water heater stan