RK -

I just ran a job with EH1 for OPE1. I then went back and changed the two hanger design cases from EC to EH1. The job ran fine with no problem.

If you're running EN-13480, this Code states that you should use the "modulus at temperature" for the flexibility analysis. The Code makes no mention of what modulus should be used for hanger design, so (in my humble opinion) you should use EC unless specfically directed otherwise (for hanger design).