Forum discussion
CS-2009 EAp2: Minimum Energy Performance
We have an existing building whereby some of the existing glass will remain however we cannot determine what the thermal properties of the glass is because there is no documentation and the manufacture is out of business at least 15 yrs ago. How can we make this determination?
A second question then is the base case - do we create from the existing building or use as prescribed by ASHRAE 90.1?
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A portion of our building envelope is historic. Can we exclude it from our model?
For an existing building, do I need to rotate the model?
Our process load is higher than 25%. Do we have to justify that?
Our local code references ASHRAE 90.1-2010. Should I use that for my documentation, or 90.1-2007?
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Can the Passive House Planning Package (PHPP) be used to energy model for LEED?
Which baseline HVAC system do I use if my building has no heating or air conditioning?
Our project has a diesel backup generator. Should we include it in our energy model?
Can SHGC be higher in the proposed than in the baseline model?
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5907 thumbs up
April 29, 2016 - 2:09 pm
Use Table A8.2 in 90.1 to provide the estimated performance values.
You can use the existing value according to Table G3.1-5 Baseline (f).