Unmet Hours

Is this the WWR measure you are using? https://bcl.nrel.gov/node/37880

If so, note the modeler description in the measure: "The construction chosen for the new window is defaulted to what is assigned to the space, or inherited from a higher level object, such as the building. If the baseline model uses hard assigned constructions you may not get the expected results."

It sounds like your seed model must have constructions assigned directly to the windows. Since there can be multiple window constructions, the measure doesn't know what to use for the new windows. If you instead set the window construction for the space/building in your seed model, it should work.

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Comments

Yes, I am using Window to Wall Ratio by Facade measure.

I do not understand exactly what I did wrong. I made my only window construction with Simple glazing system window material and put it in my only Construction set I use. I assign this Construction set to facility and to my only space. Is not that the way you set window construction for space/building?

hribr ( 6 years ago )

@hribr the construction set has a dropzone fot both fixed and operable windows, as well as skylights and glass doors. New fenestration surfaces are fixed by default. Make sure you have a construction in the fixed dropzone.

Also make sure you are assigning for exterior vs. Interior boundary condition.