High-Efficiency Particulate Air. A filter capable of removing 99.97 percent of particles as small as .3 μm from a stream of air. The standard for vacuum cleaner filters used to clean a Data Center. A European S-Class filter has the same capability.
A Data Center aisle, located between two outward-facing server rows, that typically contains a ducted return in the ceiling above for the purpose of drawing hot exhaust away from servers.
Slang for a building's standard air conditioning system used in the general office or standard work areas. Most Data Centers require a dedicated or separate cooling system, but a very small server room might be adequately cooled by house air.
An abbreviation for heating, ventilation, and ...