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I am having a hard to finding what the R value of water is. I am trying to compare it to styrofoam (which has an R-Value of 5).

EDIT

Based on the assumption that water has an insulative property, how much heat does water retard per inch?

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You can't really have an R value for a fluid on it's own since it would be dominated by convection – Martin Beckett Jun 18 '12 at 22:39
@MartinBeckett - Perhaps the R value was a misunderstanding of mine, but water does act as an insulator for heat at some level. Can you review my edit please? How much heat can water reduce per inch? – Travis J Jun 18 '12 at 22:49
because the bulk of the water moves you can't have an insulation value - it would depend on the shape of the container and the flow – Martin Beckett Jun 18 '12 at 23:25
Well, it's still an interesting question since ice and snow are both used as building materials. – ThePopMachine Jun 19 '12 at 4:18

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