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Thread: Tankless Gas Water Heater

  1. #1
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    Tankless Gas Water Heater

    > > > >

    Is a Tankless Gas Water Heater "required" to be installed on
    a dedicated circuit, and is that circuit "required" to be GFCI
    protected, or can we use a General Use Receptacle in the
    room this Tankless Water Heater will be installed ?

    Essentially, we are using the 2011 NEC.

    Thanks !


    < < < <

  2. #2
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    Depends
    As far as it being on its own circuit. That could vary based on manufacturers installation instructions and power requirement of the device based on 210.23. In most cases, they will require a dedicated circuit.

    GF protection would depend on a receptacle being involved and the location based on 210.8.
    Last edited by Little Bill; 08-04-17 at 11:40 PM. Reason: Typo
    At my age, I'm accustomed to restaurants asking me to pay in advance, but now my bank has started sending me their calendar one month at a time.

  3. #3
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    Quote Originally Posted by north star View Post
    Is a Tankless Gas Water Heater "required" to be installed on
    a dedicated circuit, and is that circuit "required" to be GFCI
    protected, or can we use a General Use Receptacle in the
    room this Tankless Water Heater will be installed ?
    Gas tankless water heaters use just a tiny amount of amperage to ignite the flame. Unless the manufacturer requires it, there is no need for a dedicated circuit. Almost all of the ones I'm asked to work on are installed on an outside wall. I usually just extend the outside GFCI circuit close enough to plug it in (cord and plug). I did do two new construction ones that were hardwired to the bedroom circuit on the other side of the outside wall.

  4. #4
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    Gas tankless or tanked can also have a combustion air fan forcing a draft in the combustion chamber, allowing for more diligent cooling off the exhaust, extracting more heat from it.

    Sent from my XT1585 using Tapatalk

  5. #5
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    % ~ ~ ~

    Thank you all for your input !

    ~ ~ ~ %

  6. #6
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    opps missed the word "gas" makes a world of difference... sorry
    At my age, I'm accustomed to restaurants asking me to pay in advance, but now my bank has started sending me their calendar one month at a time.

  7. #7
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    My tankless has a a small circ pump and combustion fan. Do you remember the 50%/80% rule for loads on a branch circuit?
    Moderator-Washington State
    Ancora Imparo

  8. #8
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    Quote Originally Posted by tom baker View Post
    Do you remember the 50%/80% rule for loads on a branch circuit?
    Please enlighten me.

  9. #9
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    Quote Originally Posted by Coppersmith View Post
    Please enlighten me.
    210.23(A)
    Roger Ramjet NoFixNoPay

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