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Monday, July 23, 2012

Importing gbXML results from CHAVC

Source/Link: 
BIM Inside the System

If you are attempting to import the calculated results of Space and Zone Heating and Cooloing Load using gbXML, you are likely to run into a slight problem.  The result of which is that the values that are imported are about 9% of what the expected values should be.  The reason is due to how CHVAC is writing out the gbXML file; it boils down to an improper specification for the unit

According to the standard published at: http://www.gbxml.org/currentschema.php

Valid values for the load units are: BtuPerHour and Watt

(specifically:  )
<xsd:simpleType name="loadUnitEnum">
<xsd:restriction base="xsd:NMTOKEN">
  <xsd:enumeration value="BtuPerHour" />
  <xsd:enumeration value="Watt" />
  </xsd:restriction>
</xsd:simpleType>

However, in the gbXML file, what you may find is unit="Watts" insetead of unit="Watt"

Using a simple editor, like Notepad, you can do a search and replace for the unit="Watts" to correct the specification to Watt.  After doing so, you should get the expected results when importing into Revit.

If you are a user of CHVAC, and this issue is important to you, please contact Elite Software directly.


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