I suspect the answer to my question is in my guidebook, but since I bought it in PDF format and its not wanting to recognize my username and password today (yay!), hopefully somebody knows the answer to this off the top of their head.
I am modelling a core and shell project. In the proposed building, the "core" areas that are completely finished, such as the lobby and public restrooms, have a complete finished lighting package. I know what to do with that.
The shell spaces that will eventually become tenants have a few strip lights for temporary navigational purposes only. They will generally remain off with the exception of when the space is being shown to potential tenants or being accessed for maintenance. So my total watts/sf for the building ends up being somewhere around 0.1 because of all the empty shell space in the proposed.
What am I supposed to model in the way of lighting in the baseline for the shell spaces? Do I just match the proposed? Do I model no lights at all? Or is there a published LPD that I am supposed to use for a shell space like that? I don't see one in 90.1.
Or since the proposed navigational lighting is temporary, do I model the spaces as completely unlit in both the proposed and the baseline?
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5907 thumbs up
September 3, 2013 - 3:17 pm
You need to model the entire building as if it was fully occupied. If you do not know what type of occupancy will be in the spaces use office. There are default occupancy values in the CS Energy Modeling Appendix in the LEED Reference Guide.
The tenant spaces should be modeled using the baseline allowances from 90.1 Appendix G. If there is no system design in those spaces then model the proposed identical to the baseline. If there is a design or if the tenant guidelines contain requirements for tenant improvements (like a reduced LPD) then you can claim energy savings for those systems.
Erin Adkins
Executive DirectorEmpirical Energy Solutions
29 thumbs up
September 3, 2013 - 4:14 pm
Thank you! We have the future tenant requirements for about 70% of the shell space, and they have very low LPD because of exclusively using LED lighting, so that should prove to be pretty beneficial.