Enhancing Energy Models using Detail Elements / Glazing Thermal Properties 

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This video demonstrates a workflow for improving the accuracy of your energy and performance analysis by specifying the thermal properties of the glazing surfaces (windows and curtain panels) in your Revit model.
In Revit, you can customize the thermal properties of the wall, window, floor, and roof constructions to accurately reflect the materials that you would like to use in your design.
To change a window or glazing element, you edit its properties and change the Analytical Properties setting to a common glazing type with prescribed thermal properties.