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R-val•ue



Pronunciation: (är'val"yOO), [key]
n.
a measure of the resistance of an insulating or building material to heat flow, expressed as R-11, R-20, and so on; the higher the number, the greater the resistance to heat flow. Cf. U-value.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

RVR.V.S.V.P

 

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