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Maintaining the T320 Air Filters



For optimum cooling, verify the condition of the filters.


On a regular basis:

Check the air filters regularly for dust and debris. Replace the filter elements as needed. The filter elements degrade over time, so the filter elements in use, as well as spares, should be replaced every 6 months. For procedures to replace the air filters, see Replacing a T320 Air Filter.

The shelf life of polyurethane filter varies from two years to five years depending on the storage conditions. Store in a cool, dry, and dark environment. Wrap the media in plastic and store in an environment with relative humidity between 40%- 80% and temperature between 40°F (4° C) to 90°F (32° C). Note that if the material flakes, or becomes brittle when rubbed or deformed, it is no longer usable.


Always keep both air filters in place while the router is operating. Because the fans are very powerful, they could pull small bits of wire or other materials into the router through the unfiltered air intake. This could damage the router components.