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What is a U-value?

20 Apr 2018 at 9:57 PM

U-values measure how effective a construction is at insulating. The U-value refers to the rate of heat transfer through a structure, and is measured in W/m2K. A lower U-value means a better thermal performance (less heat transfer). A U-value of a structure depends on the thermal resistance of each of the elements inside it, with most of the thermal resistance being provided by insulation.

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