Air filtration and visual barrier for enclosure with front-to-back airflow

A method comprising:

• removing a perforated front door of an enclosure;
• partially installing a heat generating element into the enclosure;
• attaching at least one cable to the heat generating element;
• sliding the at least one cable into a side brush filter mounted on the enclosure, wherein the at least one cable is slid into an open side of the side brush filter;
• completing the installation of the heat generating element;
• and
• re-installing the perforated front door.

An apparatus comprising:

• an enclosure comprising at least one removable, perforated front door on a front side of the enclosure, and a perforated rear wall opposite the front side of the enclosure;
• at least one filter mounted on the perforated front door and through which air is to be drawn through;
• a plurality of racks configured to mount a plurality of network line cards within the enclosure;
• and
• a plurality of side brush filters mounted on a common frame;
• wherein each of the plurality of side brush filters is configured to allow a bundle of network cables to exit the enclosure while substantially preventing dust from entering the enclosure.