If for some reason you needed to make corrections to the ventilation system in order to meet the ventilation prerequisite during the review process, you could do so without having to reset the performance period for all of the performance based credits like EAp2. Outside air measurements can and must be redone to confirm that the systems meet the prerequisite after the corrections were made.

Page 71 of the LEED-EBOM v2009 Reference Guide outlines a path for Option 3 to comply with the maximum footcandle levels prescribed by IESNA RP-33.

LEED has provivded no specific guidance for this scenario, but here are some options to consider:

The following CIR provides guidance for similar situations within the LEED-NC rating system but specific guidance for LEED-EBOM projects has not been provided by USGBC. The following CIR has not been assessed for applicability for the LEED-EBOM rating system.12/18/2007 - CIRThe applicant is seeking clarification as to the interior/exterior area classification for a four level open air parking ramp building. For the purposes of SSc8, parking structure covered floor area is to be considered interior area and uncovered area is to be considered exterior area.

Exterior fixtures with occupancy sensors cannot be excluded from the shielding requirements if pursuing Option 2.

LEED Interpretation #2099, issued 4/24/2008, allows the use of circuit transducers that measure fan status of 100% outside air and constant volume fan systems as an alternative to an airflow measuring station for this credit. For constant volume and 100% outside air systems that have been accurately balanced, monitoring the fan status is adequate to maintain proper outside air volumes. This is not an appropriate strategy for variable volume systems.

None of this area qualifies. You should take is as a cue that your area is likely to have glare issues, and consider either lowering your glazing visual light transmittance, or reducing your window size.

Recalculate zone floor area (ZFA) = (WA xVLT)/0.150. So if, for example, you have a window area of 120 ft2 and a VLT of 0.4, ZFA = (WA xVLT)/0.150 = (120 x 0.4)/0.150 = 320. There is one caveat and that is that your ZFA must be equal to or greater than your zone width. Otherwise you must enter 0 for this ZFA.

The latest definition for a regularly occupied space (per a 2011 addendum) is “an area where one or more individuals normally spend time (more than one hour per person per day on average) seated or standing as they work, study, or perform other focused activities inside a building."

The standard eye height for an adult while seated is 42". Depending on the use of the space, the eye height may be at 5’9” or lower. The idea is that the occupant should not have to move their head significantly to view outside. Also, with having access to view at this height, the peripheral vision is not affected. Occupants still receive glimpses of the outside.