Hello,

I have a potential project in which the client is proposing a curtain wall
system.
The model will be based on ASHRAE 90.1-2013 Appendix G.
I believe the appropriate way to model this would be to have a WWR of 100%
(or near 100%) in the proposed case. For the baseline case, the window
area would have to be reduced to get the WWR down to 40%.
Is this the correct way or is there different guidance for modeling curtain
wall systems?

Thank you,
Mike Campbell