Dear forum,

I hope the following help request is falling under the right LEED version, since the calculations I am running are following the guidelines of CS2.0 as the design studies of the building were started in 2008. I am using the OPTION 2 - Daylig simulation Model.

The 30 floor office building is located in a dense urban area with immediate adjacent buildings in the context.

The guidelines say : "calculate the daylight illunitation for each applicable space using the following criteria: clear sky conditions at 12:00 noon on the equinox(s) for the project specific location".
Each floor are the same design except the first 5 floors.

Since the design has to achieve more than 75% of the total regularly occupied spaces with a minimum of 25 fc, and since this is a weighted average area calculation of the different daylit zones, it sounds crazy to run each separate floors being really time consuming. Is there an alternative way to take some low-mid-high level typical floor to run the calculations and assumed this is a fair representation of the overall building simulation ? (similar to the floor multiplier when running and energy model).

The concern is that every floor has a different DF then since the adjacent building are smaller than the as designed office.

Also I assume the context needs to be modeled as it plays an important shading mask role impacting the illuminance map of the floor.

Thank you for your valuable feedback.

Olivier.