Gas Water Heater Vs Electric Water Heater Efficiency. Electricity has spent his career analyzing and understanding energy use including hot water heater energy savings and the differences between gas vs. Electric hot water heater cost and efficiency for the most part the choice boils down to understanding gas vs.
The bigger the ef number the more efficient the appliance. A gas water heater uses the heat from burning a fuel usually natural gas to heat water while an electric water heater uses electric resistance coils. The pinnacle of efficiency in electric water heaters is the heat pump water heater.
Electric water heater operating costs.
The bigger the ef number the more efficient the appliance. Electric water heaters typically have a lower upfront cost than gas water heaters. Most gas fired water heaters have an energy factor ef number set by the u s. In fact uef provides a more consistent and accurate way to measure energy efficiency performance in water heaters across all national brands.