Dear All
Please guide me that the element in electric water heater (Kw) is equal to the electric power(Kw) used to heat water.
Regards
:confused:

Well not quite: You can convert BTU/hr to watts by this: 1 Btu/hour [I.T.] = 0.293 071 07 watt

Then you use those funky formulas that tell you how many thermal units( BTU's) is necessary to raise 1 lb of water 1 deg F.

You also have a tempeerature dfference:
Ground water (55 F) to say (140F)

And you size the element based on how long you want it to take.

And there are tank losses to calculate using thermodynamics.

1 Gigawatt would probably boil the water instantly and 10 Watts would never heat it at all.

Quote:

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Originally Posted by pvsundararajan

Dear All
Please guide me that the element in electric water heater (Kw) is equal to the electric power(Kw) used to heat water.
Regards
:confused:

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If you're asking what the wattage is the elements are the average size is
4500 Watts that pull 19 Amps when in use. Regards, Tom

Unless you are working on your final thesis for your doctorate in electrical engineering from MIT than info submitted by KISS is way too technical answer for you.

As Tom said, the two most common elements in residential hot water heaters are 3 500 and 4 500 KW. You can have 1 or 2 elements in one heater. Use thermostat to adjust water temperature based on time of the year and delivery distance.