Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
When you run CBECC, and assuming you are retaining output files (see settings under Tools -> Program and Analysis Options, and set Simulation and Analysis output options to 2 or higher), there is an intermediate SDD file that we call the 'Sim SDD' xml. One of these is created for each run, and named accordingly, for example, * - ap.xml is the Annual Proposed model, or in other words, your input model as processed by the ruleset for the final T24 compliance run.
If you open this file in a text editor, change the property (Proj) 'HVACAutoSizing' from 0 to 1, and then load the SDD file into OpenStudio (File -> Import - > SDD), OS will ignore all the system capacities defined in your CBECC model.
I'm hoping we can make this more accessible in the CBECC interface in the next release, though it would be a feature that isn't valid for compliance, but could be useful for debugging capacity/unmet hour issues.
