How Long Does it Take For a 20 Gallon Electric Water Heater to Heat Up?

One question often asked by plumbers and heating repair technicians is how long it takes for a 20 gallon electric water heater to heat up. There are quite a few models on the market, some of which can exceed an hour of operation time. Depending on the model and the construction of the tank, a heater can sometimes maintain it’s temperature for nearly half an hour. If this occurs, most likely the unit is operating beyond capacity and needs to be serviced.