RELIANCE 501 Water Heater specs.

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by cbirkenbach, Oct 2, 2007.

  1. cbirkenbach

    cbirkenbach New Member

    Messages:
    1
    Can anyone tell me what the "hourly BTU input " and the " First hour rating" are for this 75 gal. water heater? Or, tell me where I can get the specs. Reliance doesn't have them on their site. Thanks
    Last edited: Oct 2, 2007
  2. jimbo

    jimbo Plumber

    Messages:
    8,997
    Location:
    San Diego
    It is probably not a current model, which is why is is not on their website, but you can figure it out.

    1) The BTU input is printed on a spec label on the water heater.
    2) The first hour delivery can be approximated as follows: Add 70% of the gallon capacity ( = 52 gallons) to the recovery rate which you can use 1 gallon per hour per thousand BTU.

    For example, if it was a 60,000 BTU unit, we would add 52 to 60 , givig an approximate FIRST hour of 112 gallons. Important to note that the SECOND and subsequent hours would be 60 gallons per hour.
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