Spaces are represented by 3D Zones in the ArchiCAD Building Energy Model. For Energy Evaluation purposes, you will group these Zones together in “thermal blocks”, using the Thermal Blocks page of the Energy Model Review palette (Design > Energy Evaluation > Energy Model Review).
Thermal blocks are a collection of one or more rooms or spaces in a building that have similar orientation, operation profile and internal temperature requirements (also called thermostat control requirements). Zones need not be contiguous to be combined within a single thermal block.