Energy Building Simulator - Doors

Good afternoon,

If I have a door that is a steel bar door (Security door) so with significant air gaps and openings, how would I model that within the materials manager?

Effectively there is no thermal resistance created by the door being there so should be modelled as an opening within a partition wall, how do I model this?

Does Open Buildings Energy Simulator model inter room/zone air mixing/changes?

Your help would be greatly appreciated.