HVAC stands for heating, air flow, and air conditioning. In processing and especially in enterprise information centers, HVAC techniques control the normal environment (temperature, moisture, air flow, and air filtering) and must be planned for and managed along with other information middle elements such as processing elements, wiring, information storage, fire protection, actual security techniques and power. The selection of an HVAC specialist is an important step in preparing a information middle.

Almost all actual elements devices come with ecological requirements that include acceptable heat range and moisture varies. Environmental requirements are usually described in a product requirements papers or in a actual preparing guide.

A individual area, called a plenum, is often assigned to house and allow air movement for HVAC and interaction wiring, typically in the area between the architectural roof and a drop-down roof or under a raised floor.