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  1. #1
    Join Date
    Mar 2007
    Location
    Fuquay Varina, NC
    Posts
    1,072

    Default Water Heater sizing

    This may have been a subject before but I could not find anything.
    Three bedroom house with 2 full baths. Had a gas direct vent water heater size unknown because it was replaced with a 40 Gal electric water heater when the upstairs was finished off. They added another bedroom and bathroom upstairs. So the home is now 4 bedroom and 3 full baths. One bath has garden tub. A 40 gal. WH is undersized is it not? By what means do they calculate the size of a water heater for a home. Is there anything written?

    Thanks

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  2. #2
    Join Date
    Mar 2007
    Location
    York SC Licensed in NC and SC
    Posts
    596

    Default Re: Water Heater sizing

    Lots of recommendations but have not seen actual code.

    50 gal electric would be considered on the low end for that house.
    75 gal electric would be considered good.

    A hot water circulation loop would help a lot if they keep the 40 gal.


  3. #3
    Join Date
    Mar 2007
    Location
    Dallas, Texas
    Posts
    4,112

    Default Re: Water Heater sizing

    State water heater manufacturer has a table on their web site.
    State Industries | Residential Sizing Guide

    Jim Luttrall
    www.MrInspector.net
    Dallas, Texas

  4. #4
    Join Date
    Mar 2007
    Location
    Fuquay Varina, NC
    Posts
    1,072

    Default Re: Water Heater sizing

    Thanks guy's
    You would think they would come up with some set standards in the IRC

    Mike Schulz License 393
    Affordable Home Inspections
    www.houseinspections.com

  5. #5
    Bob White's Avatar
    Bob White Guest

    Default Re: Water Heater sizing

    I'm a little late to this party, but, for what it's worth, Georgia adds this table to the end of chapter 5 of the IPC (we don't use the IRC for plumbing around these parts) .....

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