1. All of your HBSrfs must make closed volume

[minggangyin]

Hi,@nicolajlangkjaer
You can refer to this discussion

Energy simulation error “…it is not possible to calculate the volume from the surrounding surfaces…”

Hey guys, I am new here. I am working in an energy simulation for a school building. I made several surfaces and created zones from them, but when performing the energy simulation get the following severe errors: 1, 2 & 3. The simulation has not run correctly because of this severe error: ** Severe ** For zone: ZONE_C3 it is not possible to calculate the volume from the surrounding surfaces so either provide the volume value or define all the surfaces to fully enclose the zone. The simula…