Enclosure Fans & Ventilation

If an enclosure is not protected from moisture penetration, condensation can accumulate on the components inside the enclosure. Outdoor enclosures can be the most vulnerable to condensation, because they are often installed in environments that have high ambient humidity levels. Condensation can cause damage to electrical components, as well as to the enclosures themselves. Some potential hazards include: corrosion, short circuits, premature breakdown, mold and water drainage issues. Installing devices such as heaters, fans, air conditioners and dehumidifiers can help to manage an enclosure’s internal temperatures. These devices are typically regulated by thermostats and hygrostats, which automatically trigger the fans and heaters when ambient conditions reach a certain temperature or humidity level.

Open-loop cooling replaces the air inside an enclosure with cooler air from outside. It is the most commonly used process when the available air supply is cool enough and clean enough to provide the required heat removal. Open-loop cooling works best when the cabinet has sufficient venting at both the top and the bottom to promote airflow. Ideal environments for open-loop cooling include data networking centers, light-duty factories or office buildings.

Enclosure Venting allows natural exhausting of hot air and helps to keep a cabinet rack cool inside. Top and side mounted exhaust grilles and filters promote easier air entry and exit with added protection against dust and unwanted particles.

Enclosure Fans are used when natural convection of air is inadequate. Axial fans are the most common type used in cabinet cooling systems. They are typically used for general hot air removal as well as heat transfer from specific hot spots. Exhaust fans can be mounted inside or outside of the cabinet as well as the front, back or sides.