Core & Shell Appendix 2 requires that the baseline core and shell HVAC system be modeled per ASHRAE 90.1-2007 Table G3.1.1A. Appendix 2 also dictates the values used for power and lighting in the tenant spaces (based on ASHRAE 90.1-2007 andTable 1 in Appendix 2). Appendix 2 does not mention the HVAC system for the tenant spaces. I am working on a 2 story office building that is 140,000 sf total. During the core and shell design only the core will be conditioned (less than 25,000 sf) by units only serving the core area. The tenant portion will be conditioned with separate units during the tenant improvement. First, is my area for use with the "Building Type" in Table G3.1.1A based on the whole building area (approx. 140,000 sf) or just the currently conditioned core area (less than 25,000 sf)? Second, does the HVAC system have to be modeled for the entire building or just the core?