Net ZEB Design Processes and Tools - Modeling, Design, and Optimization of Net-Zero Energy Buildings - page 199

Fig. 4.13 Four different thermal zone configurations for a passive solar
house (O'Brien, Athienitis, and Kesik, 2011b)
Fig. 4.14 Total heating and cooling energy for four thermal zoning
configurations of the same house model
One of the most time-consuming building modeling tasks is geometry input
(Bazjanac, 2001). Bazjanac estimated that geometry-related tasks account
for about 80% of simulation input time resources ( Figure 4.15 ) . However,
this will depend greatly on geometry complexity and whether or not the
HVAC systems, another time consuming category of inputs, are modeled in
detail.