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I got different values for Window to Wall Ratio (WWR) of the same building geometry using two different approaches ?

I calculated WWR using the following methods ( for which i got different values) 1) simulated the model in open studio and and the results of the simulation gave window to wall ratio values ( which appears very low) 2) i calculated the area of the window and wall surface( selecting the surface and sketchup tells me area) and calculated the window to wall ratio manually ( the values make sense but is nearly 3 times the values given by simulation (step 1))

Please help and tell me which is the simulation of model is giving me a values of ~9% for 8 storey campus university dorm. Manually the WWR comes ~35% which makes sense.

I got different values for Window to Wall Ratio (WWR) of the same building geometry using two different approaches ?

I calculated WWR using the following methods ( for which i got different values) 1) simulated the model in open studio and and the results of the simulation gave window to wall ratio values ( which appears very low) 2) i calculated the area of the window and wall surface( selecting the surface and sketchup tells me area) and calculated the window to wall ratio manually ( the values make sense but is nearly 3 times the values given by simulation (step 1))

Please help and tell me which is the simulation of model is giving me a values of ~9% for 8 storey campus university dorm. Manually the WWR comes ~35% which makes sense.

I got different values for Window to Wall Ratio (WWR) of the same building geometry using two different approaches ?

I calculated WWR using the following methods ( for which i got different values) 1) simulated the model in open studio and and the results of the simulation gave window to wall ratio values ( which appears very low) 2) i calculated the area of the window and wall surface( selecting the surface and sketchup tells me area) and calculated the window to wall ratio manually ( the values make sense but is nearly 3 times the values given by simulation (step 1))

Please help and tell me which is the simulation of model is giving me a values of ~9% for 8 storey campus university dorm. Manually the WWR comes ~35% which makes sense.