How to model constant air volume system using eQUEST?

edit

You can change the system input for "Cool Control" to have the supply air temperature vary. You probably want to choose "Warmest" as the option instead of "Constant". That will reset the supply air temperature each hour based on zone demand.

So to be clear, you have quite a few options with VAV and with CV system types in eQuest, and a VAV system made to produce CV can still be made to vary supply temperature if that's desired. If you're looking for something like a classification to help you guide which system type options to consider for a given project, I may suggest investing a little time reviewing & absorbing the reference manual entries at and beneat: Volume 1: Basics > Air-side Components > Introduction > Air Systems. There you can find a descriptive/illustrated classification of airside system types. It isn't comprehensive but could help you get the lay of the land.

I wouldn't venture that I really have a favorite per se, however for system types which are natively CV, I probably utilize PTAC, UHT/UVT, PSZ and MZS/PMZS system types most often. It is a little extra work to make a VAV system type behave as though it's contant volume, however that effort can make parametric "VAV conversion" a relatively simple task, and for that reason primarily I and others do often leverage VAVS/PVAVS some fraction of the time where I intend to quantify savings potential for such an ECM.

I hope that's helpful!