DesignBuilder v3 will have much improved the readability of zone and surface names using the user-defined names, made unique where necessary. The new version will be released early in 2011.
In the meantime there is a short article on how to map from the numeric zone names used in IDF back to the zones in the DesignBuilder model at:
As mentioned by Alaa, the key is to open the IDF file in a text editor and check the comments.
To change the names I open the idf file in a text editor, design builder uses weird numbers but it shows the original name in a remark. idf editor doesn't show the remark, then finally i use "find and replace command to replace the zone name with the name i want. This method is annoying though when you have to move forward and backward between design builder and E+. It also can cause problems if the same numerical zone name was used for another input variable.
Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx
The primary EnergyPlus web site is found at:
The group web site is:
Attachments are currently allowed but be mindful that not everyone has a high speed connection. Limit attachments to small files.
EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
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