Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
As long as I know, DOAS and AHU in series can't be modelled in DesignBuilder.
AirLoopHVAC:DedicatedOutdoorAirSystem was implemented for the first time in EnergyPlus V9-2-0.
The latest DesignBuilder, v7, uses EnergyPlus V9-4-0 as a calculation engine, but the user interface of DesignBuilder does not support to model AirLoopHVAC:DedicatedOutdoorAirSystem. My sense is that DesignBuilder supports only 20 to 30% of the whole EnergyPlus features.
The user interfance of OpenStudio also does not support to model AirLoopHVAC:DedicatedOutdoorAirSystem.
I suggest using EnergyPlus directly or IES-VE. Please note that the latest version of EnergyPlus should be used because there are many bugs in the old versions. You can search AirLoopHVAC:DedicatedOutdoorAirSystem on UnmetHours and find bug reports.
