The U-value and other analytical properties for windows and doors in Revit are set by default and come from the ASHRAE standard. Sometimes, though, you need different U-values for heating load calculations. So, how do you change these hardcoded values?
You can find these constructions on your computer: C:\Program Files\Autodesk\Revit 2018\en-US\Constructions.xml
Be aware that the “Construction.xml” file is different for different Revit Language Packages. So just make sure you modify the right one.
- Open the “Construction.xml” file and review all possible windows and doors.
Below, you can see the code for a window I selected in Revit Window Types. (I used search to find this paragraph of code.)
- Copy/Paste this paragraph and change all the necessary data. I usually change only Name, Description, and U-value.
- After these steps are done – save your “Construction.xml” to the
- Reload Revit.
- Open Revit Window Types and review your new Window parameters!
You could apply the same workflow to the Door category as well.