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Tankless Gas Water Heaters

Discussion in 'Commercial Electrical Codes' started by north star, Aug 4, 2017.

  1. north star

    north star Sawhorse

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    > = <

    This is a Commercial application. We are using the 2011 NEC.

    QUESTION # 1:
    Are Tankless Gas Water Heaters "required" to be installed
    on dedicated electrical circuits, or can a non-dedicated electrical
    circuit be used ?

    QUESTION # 2:

    If Tankless Gas Water Heaters are installed on dedicated
    electrical circuits, are those circuits "required" to be GFCI
    protected ?

    Please provide applicable Code Sections if possible.

    Thank you ! :D


    < = >
     
  2. Gregg Harris

    Gregg Harris Gold Member

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    Dedicated recommended by most manufacturers, but not required. No GFCI
    or AFCI to be used.
     
    north star likes this.
  3. ICE

    ICE Sawhorse

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    Most tankless water heaters are placed outdoors. The attachment plug serves as the disconnect and the receptacle shall be protected by GFCI. If there's a new circuit that serves only exterior receptacles, no AFCI is required. If the receptacle is added to a circuit, there's most likely a requirement for AFCI.
     
    north star likes this.
  4. Msradell

    Msradell Sawhorse

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    ICE, you've been drinking too much of that California Kool-Aid! I personally
    bet that probably at least 80% of tankless hot water heaters are installed
    indoors. Putting them outdoors does not make much sense in most parts of
    the country.
     
    north star likes this.
  5. north star

    north star Sawhorse

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    $ = = = =

    Thanks to all for your input ! :cool:

    = = = = $
     
  6. Francis Vineyard

    Francis Vineyard Sawhorse

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    Assuming fuel fired WH

    #1. 110.3 (B)

    #2. 210.8 (B)
     
    north star likes this.
  7. ICE

    ICE Sawhorse

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    Sometimes I forget that there is more to the USA than just California.

    If Columbus had landed at Santa Monica, everywhere beyond Bakersfield would still be wilderness.
     
    #7 ICE, Aug 5, 2017
    Last edited: Aug 5, 2017
    Msradell likes this.
  8. steveray

    steveray Sawhorse

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    If it is in the basement, everything (receptacles) is GFCI now (although I think that is 2014) sump pump, condensate pump, HVAC equip, freezer, etc...
     
  9. mark handler

    mark handler Sawhorse

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    In temperate climates, with no basements, most will be installed outside. Especially in homes built pre 70's.
    Small homes do not have the space inside.
     

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