I am a student working on my thesis. I am modelling a building in OS 2.7.0

I have done some research and found the following (https://unmethours.com/question/15684/design-specification-zonehvac-sizing-object-name-in-zonehvacidealloadairsystem/), they say that design specification outdoor air object is optional and you can leave it blank.

But I get for my rooms where there is supply air with a diffuser the following error.

 ** Severe  ** Controller:MechanicalVentilation="CONTROLLER MECHANICAL VENTILATION 1", Design Specification Outdoor Air Object Name blank
   **   ~~~   ** For Zone="THERMAL ZONE 10".
   **   ~~~   ** This field either needs to be filled in in this object or Sizing:Zone object.
   **   ~~~   ** For this run, default values for these fields will be used.
I also get following warning
** Warning ** GetOAControllerInputs: Controller:MechanicalVentilation="CONTROLLER MECHANICAL VENTILATION 1
   **   ~~~   ** Cannot locate a matching DesignSpecification:OutdoorAir object for Zone="THERMAL ZONE 10".
   **   ~~~   ** Using default OA of 0.00944 m3/s-person and 0.0 m3/s-m2.

this error occurs if i don't put in a design specifiaction outdoor air object (blue circle)

As you can see this room "hobbyruimte" part of thermal zone 10 has a diffuser

the air system has no cooling or heating control just a heatexchanger and evaporative cooler, the diffusers are hardsized. The problems are solved if I place a design specification outdoor air object but I don't want that.

If I delete more design specification outdoor objects then i also get more errors in my plant loop?

Someone with a solution or knows what causes the problem? you can find the OS files in this link (https://we.tl/t-9ehamVgRNI) error file 11-45(error) and openstudio, implementing design specification solves that problem but then I need to implement a design specification outdoor air object in space types which isn't what I want.

I am a student working on my thesis. I am modelling a building in OS 2.7.0

I have done some research and found the following (https://unmethours.com/question/15684/design-specification-zonehvac-sizing-object-name-in-zonehvacidealloadairsystem/), they say that design specification outdoor air object is optional and you can leave it blank.

But I get for my rooms where there is supply air with a diffuser the following error.

 ** Severe  ** Controller:MechanicalVentilation="CONTROLLER MECHANICAL VENTILATION 1", Design Specification Outdoor Air Object Name blank
   **   ~~~   ** For Zone="THERMAL ZONE 10".
   **   ~~~   ** This field either needs to be filled in in this object or Sizing:Zone object.
   **   ~~~   ** For this run, default values for these fields will be used.
I also get following warning
** Warning ** GetOAControllerInputs: Controller:MechanicalVentilation="CONTROLLER MECHANICAL VENTILATION 1
   **   ~~~   ** Cannot locate a matching DesignSpecification:OutdoorAir object for Zone="THERMAL ZONE 10".
   **   ~~~   ** Using default OA of 0.00944 m3/s-person and 0.0 m3/s-m2.

this error occurs if i don't put in a design specifiaction outdoor air object (blue circle)

As you can see this room "hobbyruimte" part of thermal zone 10 has a diffuser

the air system has no cooling or heating control just a heatexchanger and evaporative cooler, the diffusers are hardsized. The problems are solved if I place a design specification outdoor air object but I don't want that.

If I delete more design specification outdoor objects then i also get more errors in my plant loop?

Someone with a solution or knows what causes the problem? you can find the OS files in this link (https://we.tl/t-9ehamVgRNI) error file 11-45(error) and openstudio, implementing design specification solves that problem but then I need to implement a design specification outdoor air object in space types which isn't what I want.

I am a student working on my thesis. I am modelling a building in OS 2.7.0

I have done some research and found the following (https://unmethours.com/question/15684/design-specification-zonehvac-sizing-object-name-in-zonehvacidealloadairsystem/), they say that design specification outdoor air object is optional and you can leave it blank.

But I get for my rooms where there is supply air with a diffuser the following error.

 ** Severe  ** Controller:MechanicalVentilation="CONTROLLER MECHANICAL VENTILATION 1", Design Specification Outdoor Air Object Name blank
   **   ~~~   ** For Zone="THERMAL ZONE 10".
   **   ~~~   ** This field either needs to be filled in in this object or Sizing:Zone object.
   **   ~~~   ** For this run, default values for these fields will be used.
I also get following warning
** Warning ** GetOAControllerInputs: Controller:MechanicalVentilation="CONTROLLER MECHANICAL VENTILATION 1
   **   ~~~   ** Cannot locate a matching DesignSpecification:OutdoorAir object for Zone="THERMAL ZONE 10".
   **   ~~~   ** Using default OA of 0.00944 m3/s-person and 0.0 m3/s-m2.

this error occurs if i don't put in a design specifiaction outdoor air object (blue circle)

As you can see this room "hobbyruimte" part of thermal zone 10 has a diffuser

The problems are solved if I place a design specification outdoor air object but I don't want that.

If I delete more design specification outdoor objects then i also get more errors in my plant loop?

Someone with a solution or knows what causes the problem? you can find the OS files in this link (https://we.tl/t-9ehamVgRNI) (https://we.tl/t-txH3z8iOGc) error file 11-45(error) and openstudio, implementing design specification solves that problem but then I need to implement a design specification outdoor air object in space types which isn't what I want.

I am a student working on my thesis. I am modelling a building in OS 2.7.0

I have done some research and found the following (https://unmethours.com/question/15684/design-specification-zonehvac-sizing-object-name-in-zonehvacidealloadairsystem/), they say that design specification outdoor air object is optional and you can leave it blank.

But I get for my rooms where there is supply air with a diffuser the following error.

 ** Severe  ** Controller:MechanicalVentilation="CONTROLLER MECHANICAL VENTILATION 1", Design Specification Outdoor Air Object Name blank
   **   ~~~   ** For Zone="THERMAL ZONE 10".
   **   ~~~   ** This field either needs to be filled in in this object or Sizing:Zone object.
   **   ~~~   ** For this run, default values for these fields will be used.
I also get following warning
** Warning ** GetOAControllerInputs: Controller:MechanicalVentilation="CONTROLLER MECHANICAL VENTILATION 1
   **   ~~~   ** Cannot locate a matching DesignSpecification:OutdoorAir object for Zone="THERMAL ZONE 10".
   **   ~~~   ** Using default OA of 0.00944 m3/s-person and 0.0 m3/s-m2.

this error occurs those problems air solved if i don't put in a design specifiaction outdoor air object (blue circle)

As you can see this room "hobbyruimte" part of thermal zone 10 has a diffuser

The problems are solved if I place a an design specification outdoor air object but I don't want that.

If I delete more design specification outdoor objects then i also get more errors in my plant loop?

Someone with a solution or knows what causes the problem? you can find the OS files in this link (https://we.tl/t-txH3z8iOGc) error file 11-45(error) 11-11 and openstudio, implementing design specification solves error file 11-10 doesn't give that problem but then I need to implement a design specification outdoor air object in space types which isn't what I want.types

I am a student working on my thesis. I am modelling a building in OS 2.7.0

I have done some research and found the following (https://unmethours.com/question/15684/design-specification-zonehvac-sizing-object-name-in-zonehvacidealloadairsystem/), they say that design specification outdoor air object is optional and you can leave it blank.

But I get for my rooms where there is supply air with a diffuser the following error.

 ** error.
 * Severe  ** * Controller:MechanicalVentilation="CONTROLLER MECHANICAL VENTILATION 1", Design Specification Outdoor Air Object Name blank
   **   ~~~   ** *   ~~~   * For Zone="THERMAL ZONE 10".
   **   ~~~   ** *   ~~~   * This field either needs to be filled in in this object or Sizing:Zone object.
   **   ~~~   ** *   ~~~   * For this run, default values for these fields will be used.
I also get following warning
** * Warning ** * GetOAControllerInputs: Controller:MechanicalVentilation="CONTROLLER MECHANICAL VENTILATION 1
   **   ~~~   ** *   ~~~   * Cannot locate a matching DesignSpecification:OutdoorAir object for Zone="THERMAL ZONE 10".
   **   ~~~   ** *   ~~~   * Using default OA of 0.00944 m3/s-person and 0.0 m3/s-m2.

those problems air solved if i place an design specification outdoor air object but I don't want that.

Someone with a solution or knows what causes the problem? you can find the files in this link (https://we.tl/t-txH3z8iOGc) error file 11-11 and openstudio, error file 11-10 doesn't give that problem but then I need to implement a design specification outdoor air object in space types