Hello!

I am constructing a building model which spaces are half offices, half laboratories.
The HVAC system chosen is system 5 (packaged VAV with reheat) for all building, since it is considered a single thermal block.
In order to meet G3.1.1 c., is it necessary to model laboratories area itself with an independent system 5 or 7? Or should I model the entire building with a single HVAC (system 5)?

Thanks