We are applying for a CS project which primarily will house research labs. As part of the base building design, for the tenant spaces (all assumed to be labs), provision of 100% fresh air & no re-circulation is made. Is it necessary to model the internal zoning of the tenant spaces in the energy model? Each tenant's layout will differ. All are not yet designed.
We, as a CS project, are also providing CO2 sensors in the tenant spaces to control the fresh air supply (DCV), since there is no return air. The occupancy is very low. Is this accepted as an energy saving measure? The base builder does not design the tenant layout. The CO2 sensors will be installed (in most demanding zone) once the tenant design is done.
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Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5902 thumbs up
October 4, 2012 - 11:57 am
See 90.1 Table G3.1-10 for guidance on modeling spaces that have and have not yet been designed. See also the CS Modeling guide in the appendix to the Reference Guide. Bottom line is that you need to model the spaces as if they were fitted out and fully occupied.
Yes DCV is an acceptable strategy to claim energy savings. Since it will be based on a future action this strategy must be included in the tenant lease agreement in order to count the savings.