[BLDG-SIM] AHSRAE 90.1, Appendix G Question

[Mark Prince]

I have a question about ASHRAE 90.1-2004, Appendix G.

I'm performing an energy model of a building that has a animal holding (vivarium) facility within it.  The vivarium is served by its own air handling unit, and the unit is 100% outside air.  Now, our proposed design is not going to have any exhaust air energy recovery for this vivarium air handling unit.

Based on Appendix G, I don't think I need to model the baseline building with any heat recovery based on exception G3.1.2.10.f.  Am I correct in assuming this?  This exception seems odd to me. Because my vivarium area has a lot of exhaust sources (many exhaust diffusers) it would appear that almost all 100% outside air units would meet this criteria.

In addition, I cannot utilize Exception G3.1.2.10.b to remove the energy recovery from my vivarium air handling units.  Vivarium exhaust is not considered toxic.

Does anyone disagree with my reasoning?

Thanks,

Mark Prince
Affiliated Engineers
5802 Research Park Blvd.
Madison, WI 53719
(608) 441-6668
mprince at aeieng.com


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