Question-and-Answer Resource for the Building Energy Modeling Community
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There's not much documentation on it but AirLoopHVAC:DedicatedOutdoorAirSystem is available in OpenStudio. I was able to get it to work(mostly) in 3.4.0. It's not available in the GUI, so I set everything up using measures. There do seem to be a couple bugs. The total OA flow for the DedicatedOutdoorAirSystem is supposed to be the sum of the max OA flow rates of all the OA systems for the connected loops, but I could only get it to size correctly by multiplying the max OA flows by a factor of 1.19. I also was unable to get the system to function properly with a relief fan. I used some posts on github and the sdk documentation to help with the setup.
Link to OS object: https://openstudio-sdk-documentation.s3.amazonaws.com/cpp/OpenStudio-3.4.0-doc/model/html/classopenstudio_1_1model_1_1_air_loop_h_v_a_c_dedicated_outdoor_air_system.html
Github link: https://github.com/search?q=repo%3ANREL%2FEnergyPlus+AirLoopHVAC%3ADedicatedOutdoorAirSystem&type=issues
