Emerson Xtreme Density Manuel D’Utilisation

A best practice is to use rows of equipment racks in an alternating arrangement of cold aisles and hot 

aisles. This is best accomplished when the layout of the file-server farm area is first being planned, 

and it is exceedingly more difficult to accomplish when the computer room is already populated with 

operating hardware.
In the cold aisle, the equipment racks are arranged face to face so the cooling air discharged up 

through the perforated floor tiles is drawn into the face of the computer hardware and exhausted out 

the back of the equipment rack onto the adjacent hot aisles.
Hot aisles are literally hot because the objective of the alternating cold and hot aisle design is to sepa-

rate the source of cooling air from hot air discharge which returns to the computer-room cooling unit. 

Therefore, no perforated tiles should be placed in the hot aisles. as this would mix hot and cold air and 

thereby lower the temperature of the air returning to the cooling units, which reduces their usable 

capacity.