Plenum pressure control system

A system for controlling plenum pressure for an equipment cabinet, comprising:

• a front surface, wherein the equipment cabinet intakes air through the front surface;
• a back surface, wherein the equipment cabinet expels air through the back surface;
• a first internal side, which is approximately perpendicular to the front surface and the back surface;
• a second internal side, which is approximately perpendicular to the front surface and the back surface;
• at least one enclosure fan;
• at least one internal baffle mounted within the equipment cabinet;
• wherein the at least one internal baffle is configured to block a gap between a component in the equipment cabinet and the second internal side and direct air drawn in the front surface of the equipment cabinet to another gap between the component and the first internal side;
• a pressure controller which includes a pressure sensor, wherein the pressure controller detects a differential pressure utilizing the pressure sensor and controls the at least one enclosure fan in response to the differential pressure detected by the pressure sensor to maintain a negative pressure within the equipment cabinet,
• wherein the at least one enclosure fan has a fan speed based on an amount of power received and the pressure controller controls the at least one enclosure fan by controlling the amount of power the at least one enclosure fan receives.