Hot
aisle containment (HAC) provides better server exhaust segregation by accumulating
the hot air in a contained space and channeling it back to PAC. PAC supplies
cold air directly to the data hall/server inlets and the vertical panels separate
this from hot air exhaust returning it directly to the false ceiling/ PAC
ducts. Aisle end door infrastructure is same as CAC with additional surface
capping panels.
Hot aisle containment will be more forgiving for network racks and stand-alone equipment such as storage cabinets that might have to live outside the containment architecture, i.e., they will live in the lower temperature area of the computer room.
Generally more effective. Leakage from raised floor openings in the larger area of the room goes into the cold space.
Hot aisle containment can perform well in a slab environment by merely flooding the data center with an adequate volume of supply air and containing the exhaust air.
