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c-values for copper and PEX

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David_2
David_2 Member Posts: 6
in THE MAIN WALL
I'm trying to run through some calculations based on the equations is Siegenthaler's Moder Hydronic Heating and I can't find a table of constants for smaller sized tubing typical in radiant floor heating. His table on pg 139 only goes down to 1/2" copper. I assume that PEX would have about the same constants for a given inside diameter of copper. Am I right on that? Does anyone know where to find the constant for 3/8" copper/1/2" PEX?

Thanks,

David

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  • Gary Fereday
    Gary Fereday Member Posts: 427
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    books & moore!

    Dan has the "rad pad" that showes just all of what you are asking.
  • David_2
    David_2 Member Posts: 6
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    \"rad pad\"

    I'm looking but I'm not sure I'm seeing. "rad pad" in books?
  • David_2
    David_2 Member Posts: 6
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    Now I see it!

    The RadPad. I'll order one today. Anyone want to slip me the number for 1/2" PEX so I can finish my calucalations today?
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