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  1. #1
    Join Date
    Mar 2007
    Location
    Iron Mountain, MI
    Posts
    41

    Default BTU Rating of a 30-gallon Water Heater

    Hi:

    Does anyon know the typical BTU input rating of a basic 30-gallon gas fired water heater?

    Thanks,
    Joe

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  2. #2
    Join Date
    Feb 2009
    Location
    Southern Vancouver Island
    Posts
    4,607

    Default Re: BTU Rating of a 30-gallon Water Heater

    If you gave us a brand name we could look it up.

    Disclaimer: I am not a plumber, not even a scientist.

    Last edited by John Kogel; 03-16-2011 at 09:28 AM.
    John Kogel, RHI, BC HI Lic #47455
    www.allsafehome.ca

  3. #3
    Join Date
    Mar 2007
    Location
    Iron Mountain, MI
    Posts
    41

    Default Re: BTU Rating of a 30-gallon Water Heater

    Quote Originally Posted by John Kogel View Post
    If you gave us a brand name we could look it up.

    Disclaimer: I am not a plumber, not even a scientist.
    Hi:

    The water heater in question is a Bradford-White gas fired water heater.
    23 years old.


  4. #4
    Join Date
    Aug 2008
    Location
    Pleasant Hill, Iowa
    Posts
    145

    Default Re: BTU Rating of a 30-gallon Water Heater

    31,000 btu's

    I think ???

    Dan Hagman ACI
    ProSite Home Inspections
    Des Moines, Iowa

  5. #5
    James Duffin's Avatar
    James Duffin Guest

    Default Re: BTU Rating of a 30-gallon Water Heater

    31,000 sounds close to me.


  6. #6
    Gerald Benson's Avatar
    Gerald Benson Guest

    Default Re: BTU Rating of a 30-gallon Water Heater

    The IFGC Table 402.2 says to figure 35,000 for approximate gas input for a 30-40 gallon water heater.


  7. #7
    Join Date
    Mar 2007
    Location
    Near Philly, Pa.
    Posts
    1,682

    Question Re: BTU Rating of a 30-gallon Water Heater

    Why would you need to know the BTU input on a 23 y/o DHW heater? It should be replaced and that would mean probably moving up to a 40/40. Are you checking on liner sizing, gas piping, or makeup air calculations?

    Keep the fire in the fireplace.

  8. #8
    Join Date
    Mar 2010
    Location
    Madison, WI
    Posts
    12

    Default Re: BTU Rating of a 30-gallon Water Heater

    Here is a label from a 30gal Natural Gas I found last week.


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