FreeAxez raised flooring?

[jasongurtz at npumail.com (Jason Gurtz)]

A consultant has recommended FreeAxez for the raised floor in a new data
center.  I checked it out and have concerns since it says it does NOT
create a plenum and cannot be used as an air handling space; it's a
low-profile flooring system.

How would cooling be done in this scenario?  Open air (with intake/exhaust
mixing) seems like a step backwards in terms of efficiency.

Descriptions of any operation experience with this product will be
gratefully accepted.

~JasonG


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