[EnergyPlus_Support] Window5 data vs IDF dimension

["Ery Djunaedy" <ery@xxxxxxxxxxxx>]

All,

I use Window5 data file for my windows properties, and I would like to
know is the best strategy to model the window (detail vs accuracy vs
time).

In IDF file, I modelled the windows as a long continuous horizontal
stripe in the external wall. However in Windows5 I modelled the
windows in the correct dimensions (glass+frame).

I initially thought that the Window5 data will take precedence over
the IDF dimension. But referring to the manual, this is not true. When
there is a discrepancy in the dimension between IDF and Window5, then
IDF dimension will take precedence.

The glass properties will be taken from Window5, but the dimension
will be from IDF file.

But what about the frame? The manual does not mention anything about
the frame, will the properties be taken from the Window5 file or from
IDF?

This brings the question on what is the best way to model the window.
If we want to justify, for example, that a certain window is so good
that we do not need the perimeter heating, then we need to model the
frame as detail as possible.

Do we really need to model every window exactly as the dimension is?
This will make the simulation time increased tremendously.

Any suggestion is very welcome.

Thanks,

Ery


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