Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
This answer follow from the comments in the answer from Kyle Benne. Note that Kyle said that OpenStudio will "always write the mechanical ventilation controller which is referenced by the oa controller". This is a reference to Controller:MechanicalVentilation which uses the DesignSpecification:OutdoorAir objects for control. So, if I am following correctly, in OpenStudio, the DesignSpecification:OutdoorAir values are used both for autosizing the minimum outdoor air flow rate and for controlling the minimum outdoor air flow rate during the simulation.
Controller:MechanicalVentilation computes a minimum required outdoor air flow at each time step, but that is not the final answer. Other inputs in Controller:OutdoorAir can ask for more OA. So, all of the various OA inputs need to be coordinated.
| | 2 | No.2 Revision |
This answer follow follows from the comments in the answer from Kyle Benne. Note that Kyle said that OpenStudio will "always write the mechanical ventilation controller which is referenced by the oa controller". This is a reference to Controller:MechanicalVentilation which uses the DesignSpecification:OutdoorAir objects for control. So, if I am following correctly, in OpenStudio, the DesignSpecification:OutdoorAir values are used both for autosizing the minimum outdoor air flow rate and for controlling the minimum outdoor air flow rate during the simulation.
Controller:MechanicalVentilation computes a minimum required outdoor air flow at each time step, but that is not the final answer. Other inputs in Controller:OutdoorAir can ask for more OA. So, all of the various OA inputs need to be coordinated.
