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Old 03-16-2015, 12:22 PM   #1
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Occasional high demand for hot water

On a few occasions each year our nature center kitchen needs hot water for several hours at a time. The one gas water heater cannot meet that demand but is adequate for most days.

I could add an electric heater ( or two) in series with the gas heater to meet the demand but how should I maintain the additional heater when its not in use?

1) keep running hot water through it ( high standby losses)
2) disconnect and drain the electric heater
3) just let it sit
4) route cold water through it to keep it clean

Or ????

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Old 03-16-2015, 01:41 PM   #2
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Add a second (preferably gas) WH in series with the existing. Water thru the new WH into the existing heater. Keep the new one shut down when not needed.
My electrical answers are based on 2017 NEC, you may have local amendments.

Location: Coastal South Carolina
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Old 03-16-2015, 05:17 PM   #3
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Add a larger higher recovery gas hot water tank.

Sell the old one in craigs list if it isn't that old.
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