Hi all,

I'm currently working in a project of shopping mall (common areas + tenant areas) pursuing LEED certification (Core&Shell). In tenant areas, a relevant part of the total installed lighting power is dedicated to highlight merchandise. Due to this, and according to ASHRAE 90.1-2010 section 9.6.2b), there is an additional power allowance that can be considered, depending on which type of merchandise is sold in each area. Thus, I have two questions:

1) for simulation purposes, the baseline building shall consider this additional lighting power in tenant areas, correct?

2) due to the type of project (shopping mall), at this phase it is not possible to predict accurately the type of merchandise that will be sold in each tenant area. Thus, can we consider an typical mix of tenant areas (based on simillar projects of the same company) in order to calculate the additional lighting power (e.g.: 40% of tenant areas refer to clothing, 20% refers to jewelry, 20% refers to sporting goods and small electronics and the remaing area refers to restaurants).

Thanks in advance,