Zones properties, such as heating and cooling temperatures and outdoor air information, determine the heating and cooling loads for the spaces in the building model.
With a zone selected in a view or in the System Browser, you can access zone properties as follows:
- Click Modify HVAC Zones tab
Properties panel
Properties. - Right-click the zone in the floor plan, and click Properties.
- In the System Browser, right-click the zone, and click Properties.
The following table lists the zone properties:
| Parameter | Description |
|---|---|
| Constraints | |
| Level | The base level on which the zone resides. This is a calculated value. |
| Mechanical - Airflow | |
| Calculated Supply Airflow | The total supply airflow for the zone calculated by a heating and cooling loads analysis, or read from an imported gbXML file. |
| Calculated Supply Airflow per area | The Calculated Supply Airflow of the zone divided by the total area of the zone. This value is calculated by a heating and cooling loads analysis, or read from an imported gbXML file. |
| Dimensions | |
| Occupied Area | The sum of the areas for all of the occupied spaces in the zone. This is a calculated value. |
| Gross Area | The sum of the areas for all of the occupied and unoccupied spaces in the zone. This is a calculated value. |
| Occupied Volume | The sum of the volumes for all occupied spaces in the zone. This is a calculated value. |
| Gross Volume | The sum of the volumes for all occupied and unoccupied spaces in the zone. This is a calculated value. |
| Perimeter | The sum of the perimeters for all the spaces in the zone. All common parameters shared by these spaces are omitted from the calculation. This is a calculated value. Note: To improve performance, this parameter is disabled for Default zones.
|
| Identity Data | |
| Comments | Text comments for the zone. |
| Name | Name of the zone. Each name must be unique. |
| Phasing | |
| Phase | The project phase to which the zone belongs. This is a read only value based on the view properties. See Working with Phases and Zones for more information about phases and zones. |
| Energy Analysis | |
| Service Type | The heating and cooling service for the zone. You can select a specific service type or accept the default specified as the <Building> service type for the zone. |
| Coil Bypass | The manufacturer’s coil bypass factor. This is a measure of efficiency that indicates the volume of air passing through the coil that is unaffected by the coil temperature. |
| Cooling Information | Opens the Cooling Information dialog where you specify the cooling information for the zone. |
| Heating Information | Opens the Heating Information dialog where you specify the heating information for the zone. |
| Outdoor Air Information | Opens the Outdoor Air Information dialog where you specify the outdoor air information for the zone. |
| Calculated Heating Load | The total heating load for the zone calculated by a heating and cooling loads analysis, or read from an imported gbXML file. Not Computed is displayed prior to a heating and cooling analysis, or gbXML import. |
| Calculated Heating Load per area | The Calculated Heating Load of the zone divided by the total area of the zone. This value is calculated by a heating and cooling loads analysis, or read from an imported gbXML file. Not Computed is displayed prior to a heating and cooling analysis, or gbXML import. |
| Calculated Area per Heating Load | The total area of the zone divided by the Calculated Heating Load of the zone. This value is calculated by a heating and cooling loads analysis, or read from an imported gbXML file. Not Computed is displayed prior to a heating and cooling analysis, or gbXML import. |
| Calculated Cooling Load | The total cooling load for the zone calculated by a heating and cooling loads analysis, or from an imported gbXML file. Not Computed is displayed prior to heating and cooling analysis or gbXML import |
| Calculated Cooling Load per area | The Calculated Cooling Load of the zone divided by the total area of the zone. This value is calculated by a heating and cooling loads analysis, or read from an imported gbXML file. Not Computed is displayed prior to a heating and cooling analysis, or gbXML import. |
| Calculated Area per Cooling Load | The total area of the zone divided by the Calculated Cooling Load of the zone. This value is calculated by a heating and cooling loads analysis, or read from an imported gbXML file. Not Computed is displayed prior to a heating and cooling analysis, or gbXML import. |