Vacant Space FTE User Group

That's a tough one Kelly but the reviewers intent here is simply to ensure that the performance of the fixtures in the vacant space is not ignored in the calculation. They envision a situation where you have a discrete chunk of floor space that is empty, and that you can assign a virtual occupancy to that area by using the ASHRAE default rates. If vacancy fluctuated over the PP, I would be tempted to apply the occupancy levels from the beginning of the PP and calculate the remainder. But I'm not sure if I've quite answered your question. . .

The "Reduced Occupancy Guidance" document from the USGBC addresses this:

For floors or separate tenant spaces that are fully occupied or partially occupied during some portion of the performance period, use the normal procedures for this prerequisite. Assume any partial-year numbers apply on an annual basis as well unless circumstances justify an adjustment.

You can find the document at http://www.usgbc.org/ShowFile.aspx?DocumentID=6292.

My recommendation: If a portion of the building was occupied at the start of the performance period and now is not, then for WEp1 use the occupancy from when it was occupied. The same would be true for a space that was unoccupied and now became occupied during the performance period. The ASHRAE defaults only would apply to spaces that were completely vacant during the entire performance period.

I've got a similar situation, and I'm still confused about how to asisgn # of fixtures.
I have 190 fixtures (all replaced after 1994).
Occupied space has 355 people.
Unoccupied space assumes 145 people.

do I assign 190 fixtures to each group?
or split the total fixtures up proportionally?

thanks

Alyson - Can you assign fixtures based on their physical location? If the occupied space represents floors 1 & 2, and the unoccupied space floor 3, you can distribute fixtures accordingly. If not, proportionally would work as well.

Dan