Data center outside air requirement

When you say data center it is unclear what type of room you are referring to. The first thing that comes to my mind is a server room. For the most part, these are unoccupied spaces and do not require ventilation; much like an electrical room. You need to pay special attention to whether or not you have a UPS system in the same space and also if you determine that there are any local contaminants that will need to be exhausted from the room.

I am working on a Tier III data center with the same question. Our server room will be occupied for a few years with between 1 to 5 FTE's working on daily basis. FTE's will taper off over time as server space is leased. I am therefore wondering what is correct CFM? Our UPS is outside the space.

Kimberly, in your case I would use the same rates as a computer room without printing. Houcine, you will be fine with a small amount of pressurization air. You are simply doing more than what is required.

kindly advice me about OA requirement for Battery room as per ashrae/ any standard  ( in % of supply air)

i want to design cooling load calculation in HAP software for a refinery building. please advice me about fresh air requirement. requirement is   1 package unit and 1 fresh air unit.

Another way to formulate the questions here would be: Is the data hall or the UPS room an occupiable space or not? The definition for occupiable space is:
occupiable space: an enclosed space intended for human
activities, excluding those spaces that are intended primarily
for other purposes, such as storage rooms and equipment
rooms, and that are only occupied occasionally and for short
periods of time.

It is a judgement call, and therefore risky for the consultant to assume such spaces are not occupiable because the understanding of the reviewer is not known.

If you want to get an official response from USGBC, you need to contact them and hope the response comes before the design drawings need to be completed.