[Bldg-sim] System Fan Power in Appendix G

[Mike Kaufman]

Sam,

Thanks for the response.  So, you are suggesting Option 2 is
appropriate.  Have you had this method accepted by USGBC?  I feel that
Option 1 is more consistent with the intentions of Appendix G, because
every time I use Option 2, I get unreasonably large fan energy savings.
I do agree that the section is written poorly, and the wording can be
interpreted either way, but I wouldn't want to overestimate fan savings
and later have this decision questioned/rejected.  Also, I interpret
section G3.1.2.8 to specify the required cfm of the return and exhaust
fans, not the power to each fan.

Thoughts?

Mike



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