[BLDG-SIM] heating energy sources per Appendix G

[Aleka Pappas <APappas@xxxxxxxxxxxxx>]

I'm having some moral issues calculating LEED energy reduction points 
per 90.1 appendix G for a project, and I'm wondering if someone else has 
had the same issue......
This project has a packaged VAV with reheat system, with natural gas 
furnaces in roof top units, and electric reheat.  There's slightly more 
heating done by the electric reheat than centrally in this building.  
The way Appendix G reads, the Budget Building should have either all gas 
or all electric heat; all electric in this case (System 8).  Well, when 
I calculate energy savings relative to this Budget, the building is at 
about 20% energy cost reduction for 3 LEED points.  The savings are all 
from the central heating energy switch from electricity to gas, and is 
largely dependent on the cost of electricity relative to that of gas.  
It doesn't seem right to give this project such a high energy cost 
reduction, but I think this is what Appendix G is saying to do.  Anyone 
have any insight?  Is this addressed somewhere that I've missed?  I'm 
really wanting to put central gas furnaces in the Budget Building.....

Thanks for your help,
Aleka

--
Aleka Pappas
Enermodal Engineering, Inc.
Denver, CO
tel: 303.861.2070
fax: 303.830.2016


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