The Opaque Assembly Tool enables determination of the heat transfer coefficient in W/(m²K) of opaque building assemblies in line with ISO 6946, also where complex inhomogeneous layers are present (e.g. I-joists). Simply complete the fields with your materials information (material type, thermal conductivity, thickness, orientation etc.) to get instant results, including a graphical representation of the construction. The tool follows the same method used in the Passive House Planning Package (PHPP) and the resulting values are therefore suitable for use in Passive House energy balance calculations.
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