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seeking others' experience when modeling natural ventilation in ECB/code compliance modeling.

ECB / Section 11 (12?!) does not say anything explicitly about natural ventilation controls (from what i can tell). It seem illogical that the Baseline model should get natural ventilation the same as the Proposed model, especially when implemented as an energy saving opportunity. There the 'catch-all' direction to 'model parameters not listed...or otherwise specifically addressed....shall be identical..."

so - have others modeled natural ventilation for credit? What type of documentation & justification was required by the AHJ?