Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
My suggestion is to look at a measure that do it for you. Or you can try to write it by yourself (I'm not experienced on it). From a direct energyplus point of view, you can write a very simple EMS program taking in your zone variable as Sensors, summing them, and then asking the result as EMS Output Variable, and than as a standard output variable. Plese see answers to following question Make My own Output Variable in Energyplus?
