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If you successfully ran an EnergyPlus simulation, you can retrieve construction U-factors from the /reports/eplustbl.html Envelope Summary Tables (here, an excerpt from the US DOE Commercial Prototype Warehouse.

image description

You can alternatively just add up the layer R-values (material thickness / material conductivity).

If you successfully ran an EnergyPlus simulation, you can retrieve construction U-factors from the /reports/eplustbl.html Envelope Summary Tables (here, an excerpt from the US DOE Commercial Prototype Warehouse. Warehouse):

image description

You can alternatively just add up the layer R-values (material thickness / material conductivity).