Advantages and Disadvantages of Three-Layer Raised Computer Flooring.

A traditional single-layer raised computer floor often combines three functions routing space for low-voltage signaling cables between computer, routing space for high-voltage power cables to computers, and plenum to supply cool air to prevent computers from overheating. A three-layer raised floor separates these functions into three separate layers the top layer houses the low voltage signal cables, the middle layer houses the high voltage power cables, and the lower layer is a sealed plenum with chimneys to supply cool air where required.