Is there an official definition of an "Exceptional Calculation Method"? I think it's clear that exceptional calculation methods include post-processing of energy model results to implement equipment that can't be modeled directly in the software.
It also makes sense that implementation of EnergyManagementSystems in EnergyPlus would constitute an exceptional calculation.
What about pushing software to model things it wasn't designed to model? Adapting efficiency curves with the PVVT system to model VRFs in eQuest is one example. Using a "dummy" zone to distribute air and approximate a DOAS system is another method that is used in eQuest and seems "exceptional" as in the software was not designed to model such a system.
