I have noticed in hourly reports and the HTML EnergyPlus Outdoor Air Summary Report that thermal zones were not receiving ventilation air volumes as defined in the OS:DesignSpecification:OutdoorAir objects. I exported the IDF file from my OpenStudio model and all of the 'Design Specification Outdoor Air Object Name' fields are blank when opened in the IDF editor.

It appears OpenStudio (1.9.0) does not set the 'Design Specification Outdoor Air Object Name' for the AirTerminal:SingleDuct:VAV:Reheat object. This excerpt from the E+ Input/Output reference suggests this field is required for the AirTerminal to deliver the proper amount of ventilation...

I am not using demand controlled ventilation and the total airflow to zones is routinely under the volume of outdoor air defined.

How does OpenStudio implement the DesignSpec:OA to ensure the AirTerminal provides minimum ventilation at all times? Are there other approaches to consider or am I missing something here?

This question builds upon this previous question

I have noticed in hourly reports and the HTML EnergyPlus Outdoor Air Summary Report that thermal zones were not receiving ventilation air volumes as defined in the OS:DesignSpecification:OutdoorAir objects. I exported the IDF file from my OpenStudio model and all of the 'Design Specification Outdoor Air Object Name' fields are blank when opened in the IDF editor.

It appears OpenStudio (1.9.0) does not set the 'Design Specification Outdoor Air Object Name' for the AirTerminal:SingleDuct:VAV:Reheat object. This excerpt from the E+ Input/Output reference suggests this field is required for the AirTerminal to deliver the proper amount of ventilation...

I am not using demand controlled ventilation and the total airflow to zones is routinely under the volume of outdoor air defined.

How does OpenStudio implement the DesignSpec:OA to ensure the AirTerminal provides minimum ventilation at all times? Are there other approaches to consider or am I missing something here?

This [This question builds upon this [this previous questionquestion](https://unmethours.com/question/5016/designspecificationoutdoorair-for-fixed-ventilation-rates/#5046)]

I have It appears OpenStudio (using 1.9.0) does not set the 'Design Specification Outdoor Air Object Name' for the AirTerminal:SingleDuct:VAV:Reheat object and therefore the minimum ventilation defined in the the space/zone DesignSpecification:OutdoorAir object is not being supplied to the zone.

I've noticed in hourly reports and the HTML in the EnergyPlus Outdoor Air Summary Report that my thermal zones were not receiving ventilation air volumes as defined in the OS:DesignSpecification:OutdoorAir objects. DesignSpecification:OutdoorAir object. I exported the IDF file from my OpenStudio model and all of the 'Design Specification Outdoor Air Object Name' fields are blank when opened in the IDF editor.

It appears OpenStudio (1.9.0) does not set the 'Design Specification Outdoor Air Object Name' for the AirTerminal:SingleDuct:VAV:Reheat object. This The excerpt from the E+ Input/Output reference suggests below confirms this field is required for the AirTerminal to deliver the proper amount of ventilation...

I am not using any form of demand controlled ventilation and the total ventilation, and the total airflow to zones the zone is routinely under the volume of outdoor air air defined.

How does OpenStudio implement the DesignSpec:OA to ensure the AirTerminal provides minimum ventilation at all times? Are there other approaches to consider or am (As an example, I have an OA requirement of 6 ACH defined and zones are only receiving 3-4 ACH)

Am I missing something here?

[This here??

This question builds upon [this this previous question](https://unmethours.com/question/5016/designspecificationoutdoorair-for-fixed-ventilation-rates/#5046)]question.

It appears OpenStudio (using 1.9.0) does not set the 'Design Specification Outdoor Air Object Name' for the AirTerminal:SingleDuct:VAV:Reheat object and therefore the minimum ventilation defined in the the space/zone DesignSpecification:OutdoorAir object is not being supplied to the zone.

I've noticed in hourly reports and in the EnergyPlus Outdoor Air Summary Report that my thermal zones were not receiving ventilation air as defined in the DesignSpecification:OutdoorAir object. I exported the IDF file from OpenStudio and all of the 'Design Specification Outdoor Air Object Name' fields are blank when opened in the IDF editor. The excerpt from the E+ Input/Output reference below confirms this field is required for the AirTerminal to deliver the proper amount of ventilation...

I am not using any form of demand controlled ventilation, and the total airflow to the zone is routinely under the volume of outdoor air defined. (As an example, I have an OA requirement of 6 ACH defined and zones are only receiving 3-4 ACH)

Am I missing something here??

This question builds upon of this previous question.