Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
For any given wall, there is a wall_assembly_r in options_lookup.tsv. For example, it's R-3.4 for an uninsulated wood stud wall. However, note that a siding R-value (e.g., here) and/or continuous insulation R-value (e.g., here) can get added to it.
If you want to confirm the overall assembly R-value (or U-factor), you can find it directly in the HPXML file that is produced for a building with a specific set of parameters. It would look something like this and will include interior and exterior air films.
