Released March 27, 2012
- Added support for AutoCAD 2013.
- Restored support for AutoCAD 2004, 2005, and 2006.
- Fixed IFC export to set units correctly to handle scaling errors in other programs.
- Fixed an error with the IFC export that would leave extra entities on the drawing when it was finished.
- Return and exhaust pressure values are now displayed as negative values in the pressure drop report on the drawing.
- Fixed crash when calculating loads in a zone with lots of rooms.
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