Forum discussion
NC-2009 EAp2: Minimum Energy Performance
We have a building that consists of new, renovated and unrenovated area. We are using builidng area method for lighting power density. For the unrenovated area, should we still use 90.1 maximum or model the same for proposed and baseline?
Thanks in advance!
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Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5914 thumbs up
July 24, 2015 - 11:44 am
Existing lighting is modeled in the baseline per Appendix G using the 90.1 allowance. The proposed is modeled as it exists.
Haojie Wang
Energy ModelerKJWW Engineering
4 thumbs up
July 24, 2015 - 12:19 pm
Thanks. For the HVAC system of the unrenovated portion in baseline, should I also use 90.1 allowance or model it the same as they exists
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5914 thumbs up
July 24, 2015 - 12:46 pm
Existing HVAC is modeled the same as the lighting. Baseline is Appendix G, proposed is as it exists.
Leandro Silva
Novva Solutions17 thumbs up
November 18, 2015 - 2:06 pm
Marcus we have a similar situation concerning exterior lighting. No changes will be made to this system but the LPD is higher that allowed by ASHRAE. Just to clarify, this system is exempt if no changes are made and it is modeled as-is for the proposed case. Is this correct?
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5914 thumbs up
November 20, 2015 - 4:38 pm
Yes that should be OK. Make sure to provide a narrative explanation to the reviewer. If you just provide the input data only they will question it.