Learn about problems that could prevent accurately calculating a heating and cooling loads analysis using Systems Analysis or preparing a model for gbXML Export, and possible solutions.
| Warning | Solution |
|---|---|
| Space volume not computed. | Enable Space Area and Volumes. See Specify Area And Volume Settings. |
| Spaces not placed or space has not been placed correctly. | Place spaces throughout the model and verify their extents to account for the entire building volume. |
| Space not enclosed. | A space has been placed that is not bounded by bounding elements (floors, walls, ceilings, roofs). This can occur for linked models if Room Bounding is not specified in the linked model’s type properties. See About Working with Zones and a Linked Model. |
| Space not upper bounded by element. | All spaces must be upper-bounded, either by a ceiling, roof, or the floor above. Add the necessary bounding element to the model. |
| Problem with people/power/lighting load. | This warns of spaces where extremely large loads have been calculated due to people/power/lighting density. See About People Loads Parameters and About Electrical Loads Parameters. This does not prevent the loads from being calculated. Notification is for information only. |
| Plenum with no ceiling. | This occurs for when Plenum is specified for a space’s instance properties, and there is no ceiling. Add a ceiling to separate the plenum space from the occupied space. |
| No spaces in the model. Spaces are needed to calculate loads. | Place spaces throughout the model, to account for the entire building volume. |
| No space bounding elements. | Room bounding has been cleared for the bounding elements that would enclose the space element. Specify Room Bounding for elements in the project or for the linked model. See About Working with Zones and a Linked Model. |
| No space bounding roof. (Not checked by Heating and Cooling Loads.) | The space does not have a roof or the roof area is 0. |
| No spaces. | Place spaces throughout the model and verify their extents. |
| Undefined spaces. | There are errors in this space that cause it to be undefined. |
| No space bounding elements. Space not enclosed. | A space has been placed that is not bounded by space bounding elements (floors, walls, ceilings, roofs). This can occur for linked models if Room Bounding is not specified in the linked model’s type properties. See About Working with Zones and a Linked Model. |
| Model with no conditioned spaces. | The loads report will effectively be empty if there are no conditioned spaces. See About Space Properties. |
| Model with no occupiable spaces. | All spaces in the model have been specified as unoccupied. This could be intentional and does not prevent the loads from being calculated. Notification is for information only. |