Viper - Overlapping Window Components

Dear all,

For the VIPER component of Grasshopper (DIVA), can you have overlapping window components?  For instance, a Kalwall window component (full wall) with clear glazing window components planar to that wall?

I have a curtain wall as a construction zone, the Kalwall as a window component planar to the construction zone, and then clear glazing overlapping both the planar Kalwall and construction zone?  Will viper take the lowest R-value, combine them, etc?

Thanks in advance,

Reinhardt