Glazing U-Value: This measures how effective is your glazing material as an insulator. Lower U-value means higher insulation which ultimately leads to energy savings.
Glazing SHGC: Solar Heat Gain Coefficient for the glass. The higher the SHGC value more heat space will receive. SHGC value varies from 0 to 1.
Since there are different types of material assemblies for glazing which would affect what value would be used to determine the automated value, cove.tool makes that assumption for the users based on Pacific Northwest National Laboratory (PNNL) building prototypes. This may differ based on your project size and use-type, and cove.tool can help better determine which is best for your project's overall performance. Glazing U-value and SHGC will be applied to the entire project if you have more than one type using an area-weighted average method to calculate a single value. If you need assistance calculating the effective r-value for your unique assembly, try out this open-source online tool.
Glazing area values will be populated automatically if the Revit, Rhino/Grasshopper and SketchUp plugin is used. These values can be edited manually as well.
The red highlighted button can be used to switch the input mode from Area(ft2) to Percentage(%) for glazing.