Is there any reason why results in the OpenStudio Results tab for monthly electricity consumption is different than what the .idf file outputs? I am asking because I have a model that I need to make some additions/changes to in EnergyPlus and was trying to determine what outputs variables make up the corresponding OpenStudio Electricity Consumption values.

I have 5 categories for the electricity consumption breakdown (Heating, Cooling, Interior Lighting, Interior Equipment, and Fans) and I can easily find the outputs variables that make up all but the heating. In my model the only 2 items that should make up the heating are the electric heating coils in the CV Fan Units and the baseboard heaters. When I output the following 2 variables (Zone Unit Heater Heating Energy and Baseboard Electric Energy) and sum the values up and convert to kWh there is a difference (the E+ output is slightly greater in all months, and not by the same amount). If anyone has any insight let me know.