Rack orientation.
WHAT THE ARRANGEMENT IS
Racks placed in rows facing each other alternately.
WHAT THAT PRODUCES
Aisles where all equipment draws in cold air Aisles where all equipment exhausts hot air
WHY IT MATTERS
Equipment draws air from the front and exhausts to the rear.
If racks all face the same way, each row exhausts into the next row's intake.
WHAT THAT CAUSES
Rising temperatures along the room, and equipment failures at one end.
WHAT PROPER ARRANGEMENT ACHIEVES
Cold air reaching every intake at a consistent temperature.
WHAT UNDERMINES IT
Equipment installed backwards Gaps in rows without blanking Doors and openings allowing mixing Perforated tiles in hot aisles
THAT LAST ONE
Delivering cold air into a hot aisle wastes it entirely.
WHAT TO VERIFY
That every piece of equipment faces the correct direction.
WHAT TO MEASURE
Intake temperatures at the top, middle and bottom of racks.
WHY
Temperature varies with height, and the top is usually worst.
