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A typical home hot water heater uses 4800 watts. The circuitry connecting to the tanks is a 20 amp breaker with #12 wire for the connection. The tank draws 20 amps. W = A x V = 20 x 240 = 4800 watts. Some industrial hot water tanks can be rated at four times the size of home tanks.

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12y ago
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11y ago

Depends on size of the elements.

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Q: How many watts are used in a hot water heater?
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