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Importing U-values into NCM - Appendix E
Building energy
models such as SBEM require walls to be input as if they are traditional
walls comprising windows and opaque wall. It is therefore important
that non-traditional walls are correctly represented when using such
models.
The individual U-values of the windows and walls do not need to
be the correct values as long as the overall U-value for the zone is correct.
However the correct area of glass must be used as this will be used to
determine the total solar energy transfer and the transmission of daylight.
The Appendix gives the method for ensuring that the correct values
are used and gives details on how to include extra heat loss due to
thermal bridges.
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