Hi all,
In our project, there will be a tenant lease agreement so that the Lighting Power density with which they design the office spaces should be below 9 W/m2 (lower than the base requirement used for the base building). That would give an energy saving measure compared to the baseline model for the energy modeling.
In EAc5.1, we are supposed to be able to quantify the energy savings, and as such would need to monitor the lighting for tenant spaces independently in that case. But in EAc5.2, we can combine plug loads with lighting loads for tenant spaces.
In that case, should we then monitor separately the lighting from the plug loads for the tenant spaces since we are claiming savings on the tenant lighting portion?
Thanks.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
March 31, 2013 - 8:03 pm
To earn EAc5.1 you would need to be able to separate the lighting and plug loads. For EAc5.2 you do not. If you want to earn both credits you need to be able to separate the two end uses.
Jean-Baptiste Noel
ESD Operations ManagerGreen & Global Consulting Pte. Ltd.
8 thumbs up
April 2, 2013 - 1:15 am
Hi Marcus,
Thanks a lot!
Just to make sure: if we had not claimed savings for lighting in tenant spaces by putting this requirement of 9W/m2, then we would not have needed to meter separately the end uses (lighting from plug loads) in the tenant spaces to earn EAc5.1.
Is that right?
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
April 2, 2013 - 9:05 am
For EAc5.1 you typically need to separate the energy end uses throughout the building in order to calibrate the model. There are many ways to do this. Submetering is just one way.