[Bldg-sim] 90.1 appendix G Baseline System interpretation

[David BRADLEY via Bldg-sim]

Colleagues,

   I am working on a 90.1 Appendix G model of a 5-story mixed-use 
building. The bottom two floors are commercial spaces, the top 3 floors 
are residential. There is an underground parking garage as well, which I 
have considered to be part of the residential use). The building is 
heated by a combination of gas and electricity; gas use predominates. By 
floor area the building is predominantly residential. However, about 62% 
of the building's total energy use is associated with the commercial 
parts. Because of the way that energy use breaks down I am leaning 
toward considering the building to be non residential, using System 5 as 
the baseline and taking exception G3.1.1 a (system 3) for the 
residential spaces. If anyone has experience with such buildings and 
could share their thoughts on the validity of my interpretation, I would 
greatly appreciate it.

kind regards and my thanks in advance

  David



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David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
d.bradley at tess-inc.com

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