I am trying to simulate a couple partitons as mass for storing any solar heat gain the room would see. I have tried constructing a mass wall and setting it as a partition to store any heat gain from the windows. I then changed the method in the adjacent room to interior mass to account for the mass of the partitions. When I run the simulation, I see a required increase in heating and a decrease in cooling demand for the zones. Am I modeling this right? is there a better way to model it?