R-value:
A measure of how well or poorly a material resists conductive heat flow through it. Insulation has a high relative R-value, while solid materials like concrete, glass and stone have low relative R-values. This value increases linearly with respect to the thickness. R-value only takes into consideration conduction and does not address the other two modes of heat transfer: convection and radiation.
November 7, 2009
Tags: Insulation Posted in: Eco-Glossary
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