Lack of impact of different glasses on EUI calculation

[vb124818]

hello. I am new to using sefaira and I have doubts about the results I am obtaining.
I am testing a model varying only the transmittance of the glass and between using a simple glass or a dvh it does not show changes in the EUIs. (U=5 W/m2k vs U=1.6 W/m2k)
could there be some error?

[Experimental_Yogi]

Hi @vb124818 can you share additional detail? The U-value of the glass will impact the conduction flows through the window and therefore it would be great if you could share your SketchUp model, Weather Data (location) and if you are using any of the default ASHRAE templates as part of your analysis.

[vladimir_bajic]

@vb124818

dvh

Hi there-

I have a few questions:
Are you trying to change the Glazing U-factor or Visible Light Transmittance?
Can you please share your model or at least send a few screen grabs where we can see how much glazing you have in the model?

Thanks

[vb124818]

I share the model with you. It would be baseline+natural ventilation vs DVH+natural ventilation. I send capture of the 2.

Model

[vb124818]

Here is the SketchUp model and Weather Data (location). I’m using “custom inputs”.

SK Mod - 2024.skp (1.2 MB)
URY_MA_Maldonado-Jaguel.Rgnl.AP.865955_TMYx.zip (412.0 KB)

[daniel_pidcock]

Hi @vb124818, on the screenshots I can also see changes to the floor finish and building rotation.
What results do you get if you leave those unchanged?

Dan

[daniel_pidcock]

When I run your model with 1.6 and 5.7 W/m2-K glazing and all other parameters unchanged, there is a significant difference in EUI:

Probably best to check all your other parameters for the concepts for any other differences.

Dan