Before exporting space data to gbXML, you must assign all spaces to a zone. You configure a zone for analysis by specifying the heating and cooling temperatures for the zone. 
- Create zones. 
 
- Select all zones. 
 
- On the Extended Data tab of the Properties palette, click 
 (Add property sets).  
- In the Add Property Sets dialog box, select ZoneEngineeringObjects, and click OK. 
 
The property set is added to the selected zone, and it can be viewed on the Extended Data tab. 
 
  
- Under Property Sets, specify the appropriate values for design heating and cooling temperatures.