Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
Is there a reason that you have to use the "input" wind pressure coefficient feature? For a two-story house, it might be OK to use the automatic calculation of wind pressure coefficients. To do that, set the "Wind Pressure Coefficient Type" field of the "AirflowNetwork:SimulationControl" object to "SurfaceAverageCalculation". Then you don't have to input any external nodes, the code will generate them for you. If you really need to input your own coefficients, then what I have done in the past is use a viewer to figure out where the surfaces are or do it semi-automatically with a script. I was using OpenStudio for both of those, but other tools should work too. Maybe Euclid for visual or eppy for scripted?
With 138 surfaces, though, a visual process is going to be pretty tedious. Doesn't DesignBuilder had a automated way to generate the AirflowNetwork for you?
