Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
@Aaron Boranian is perfectly right (and his answer should be accepted).
To state the obvious and be perfectly clear, the rule is:
* anything that starts with !- is a comment that isn't retained, and,
* anything that starts with ! (no -) would be retained.
In both cases, these are comments and do not affect in any shape or form how stuff is being understood by the E+ Input processor that reads your IDF file.
These !- in particular will be (re)added by the IDF editor upon save, and you can think of them as visual aids when you edit stuff in a text editor.
