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!
Making me think….
Seek truth while you are young, for if you do not, it will later escape your grasp