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thermal performance

  • IQ Learning

What is a U-value? IQ Spotlight Explains

Posted on April 15, 2013July 11, 2019by Rebecca Clayton

A U value is the given measurement for determining the thermal performance of building materials. It is generally calculated using BS EN 673:1998, the standard test method for determining thermal transmittance in glass and glazing. The calculated value indicates the heat loss through a material or installation and is measured in units of W/m2K. When […]

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