building parameters from EP

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Hello,

I am new to building heating/cooling, so I was working on a project where I need to construct a model for the building's HVAC system. Anyways, I was able to construct the state-space for 3R2C grey-box model. My problem is finding trustworthy data for my model as it is currently not functioning properly. Is there a way to use EP to obtain the grey-box model of my building??