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Answered

You installed a new 40 gallon water heater with a 54,000 BTUh burner. The underground water temperature coming into the house is 55F
How long will it take to heat the water in the tank to a normal setting of 120F.
Please show setup and explanation.

Answer :

Answer:

For most uses you'll want your water heated to 120 F(49 C) In this example you'd need a demand water heater that produces a temperature rise and it will take about 2 hours

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