Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
try too add design day first. in Openstudio E+ folder you can see many data input for Thailand or you can download from Energyplus.net.Autosize for such simple calculation is pretty accuracy in OS. If you want to hard sizing, you need to hard sized all value in PTAC
Make sure that you have enabled all sizing option in simulation control Zone sizing, system sizing and simulation sizing days.
check your heating and cooling schedule value. If they are out of normal range, the hvac load is removed. in your case, it's often cooling setpoint.
Are you created space type and set default internal load ? (check in input summary in E+). If you open a new file in OS (untitled) and forget set load and their schedule , it may take that result.
