Dear Forums,

A recent discussion with a colleague has made me question my understanding
of the proper way to model an HVAC system when humidity control is a project
criteria. Imagine a building in South Florida that requires the space
humidity not to exceed 55% RH.

1. The building might use Baseline system #4 (heat pump with electric
supplemental heating). I have modeled that in the past simply as a normal
heat pump with sub-cool + electric reheat for humidity control.

2. Another possibility is a System #5 or #6 (VAV fan with VAV or PFP
boxes and reheat).

The question is this:

90.1 has restrictions on the amount of air that may be reheated (It's the
greater of 0.4 cfm / sq.ft. or 30% of the peak airflow rate plus a few other
items). These are noted in Section 6.5.

Appendix G, however, does not reference the requirements of Section 6.5
anywhere (that I can see). Do they apply to a Baseline energy model?

Thanks for your input!

Description: BPT BizCard JVDII Updated

Making me think..

Seek truth while you are young, for if you do not, it will later escape your
grasp