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Electric tankless water heaters require dedicated electrical circuits and may need upgrades, including larger breakers and heavier-gauge wiring. They have lower flow rates than gas models at 2-5 gallons per minute, which works well for smaller households or point-of-use applications but may require multiple units for larger homes. Installation costs can be higher due to electrical work, and your electrical system needs adequate capacity for the wattage draw. However, their compact size and simpler installation without venting requirements make them practical for many applications.

Switching to an electric tankless water heater is worth it if you want continuous hot water, space savings, and lower operating costs. These units only use energy when heating water on demand, making them more efficient than tanks that constantly maintain temperature. They last 15-20 years compared to 10 years for tank models and take up minimal wall space. Consider your simultaneous hot water needs and whether your electrical system can handle the required amperage before switching.

Yes, you can replace a 50-gallon water heater with a tankless unit, but proper sizing is critical. Instead of matching gallon capacity, calculate flow rate based on simultaneous usage—how many fixtures you use at once. A household using a 50-gallon tank might need 5-8 GPM capacity depending on usage patterns. Electric tankless models may require multiple units for whole-home applications, while gas models typically provide higher flow rates in a single unit.

Electric tankless water heaters draw significant power when operating but only run when you're using hot water, making them more efficient than traditional tanks. Smaller units draw around 12 kW and 51 amps, while larger models require up to 32 kW and 135 amps during operation. Despite the high instantaneous draw, they use less total electricity because they don't maintain a tank of hot water 24/7, typically resulting in lower monthly energy costs.

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