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What Water Heater Capacity Is Needed For One Shower/bathroom?

I have a downstairs shower/bathroom that requires its own electric waterheater. It is a guest bedroom and ideally i’d like it to be able to provide enough hot water for two consecutive 5-minute showers. What is the minimum number of gallons I would need? Would a 30 gallon electric water heater work?

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  1. Comment by Carole Q
    August 17, 2009 @ 10:04 pm

    30 gallon would be sufficient.

  2. Comment by knowkidd
    August 18, 2009 @ 3:34 am

    Yes. A forty gallon will give you even more backup.

  3. Comment by rodafin
    August 18, 2009 @ 10:23 am

    You might want to consider what is called a point of use water heater. They are energy efficient and made for small spaces. It has a 2.5 gallon tank. They heat the water as you go and only cost from$150 to $250.

  4. Comment by little eagle
    August 18, 2009 @ 11:56 am

    I live in an apartment with one bath,we have 45 gallon water heater and that’s just right if we take showers right after each other…you could go smaller

  5. Comment by extex_co
    August 18, 2009 @ 2:41 pm

    30 gallon will cover what you need. I would also wrap it with the insulation blanket….and it you have the money…put a time on it. that way it won’t run all the time…just the hours in the day or night you need more hot water…it actually saves more than it cost in the long run.

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