Electric tank water heaters use heating elements to keep the stored water hot until its needed. For small homes with smaller water needs, an electric tank can be the perfect option at an affordable cost. The Rheem Performance 40 Gal electric water heater has enough capacity for an average size family of three or four during daily water usage.
30-04-2020· Efficiency standards for gas and electric water heaters are different, but both use the Uniform Energy Factor (UEF) ratings system, where higher scoring units produce more hot water while using less energy. To earn an Energy Star certification, for example, electric water heaters with tanks up to 55 gallons must have a UEF greater than 2. In contrast, gas water heaters with tanks up to 55 â€¦