[Bldg-sim] LEED-NC Existing Chiller Efficiency

[Howe, Timothy]

I am trying to determine if LEED-NC is a viable avenue for an existing
building.
 
We are going to use the existing boilers and chiller.  
 
My question is, what are the requirements for the existing boiler and
chiller efficiencies.  Do we have to meet the performance requirements
of section 6 in 90.1?
 
Does anyone have experience with this?
 
 
 
Timothy Howe, MS, LEED AP
Mechanical Engineer
Stantec

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