Are you using the latest LBT UTCI Comfort Map component that you can get by running the LB Versioner component? That one has the capability of accepting a folder with CSVs of hourly air speeds for each sensor in the model sensor grids. See here for more information:
I would only consider using a model like SET if you know exactly what clothing and metabolic rate the people will have. If not, then UTCI is probably still a better model for your case here.