Indirect evaporative cooler modelling in openstudio

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I have used it successfully, though it was a few years ago. You do not set "capacity" for this object / equipment since capacity varies greatly depending on the entering air conditions. Similarly, comfort is treated differently than for a mechanical cooling system. Rather, set airflow and fan power based on a criterion such as peak capacity and performance for your climate, then evaluate results / output to see if the system meets your goals.