I am trying to work on a single family slab foundation, vintage – 1960s (created in ResStock) model in open studio. I want to change the airflow changes/hour (ACH 50) for the model. From the IDF file I know that in order to change the ACH, I need to change the coefficient for infiltration. Is there any way to do this? I know I may be able to alter the Eplus portion of the measure in order to do this - but is there any other way to manually input the coefficient in Open Studio? Or any other advice to do this?