The article SK 3243.300 from Rittal is an exhaust filter for filter fans of the SK 3243.7xx, 3243.9xx, 3244.7xx, 3244.9xx and 3245.9xx series. It is a wall-mounted component made of plastic in the color RAL 7035, used as an exhaust filter in the enclosure to filter outgoing airflow and maintain internal cleanliness. Dimensions are 323 mm width and 323 mm height, with a mounting cutout of 292 mm width and 292 mm height. The device is tool-free to install and features optimized snap hooks for faster attachment to the cabinet. A new opening mechanism on the louver grille facilitates filter replacement.

Applications
The exhaust filter is specifically designed for use in industrial enclosures where controlled air exhaust with simultaneous particle filtration is required. It is used in combination with filter fans to clean the air exiting the cabinet from dust, dirt, and other particles. This extends the service life of electronic components inside the enclosure and increases operational safety. Applications include environments requiring a certain degree of protection against dust and splashing water, such as production halls, manufacturing technology, or automation technology.

Functions and Features in Detail
The device is equipped with a pleated filter, included in the delivery scope. The pleated filter ensures efficient separation of fine particles from the exhausted air. The filter surface is maximized by the pleated structure, enabling high filtration performance with low air resistance. Installation is tool-free, simplifying both installation and maintenance. The opening mechanism on the louver grille allows easy access to the filter for replacement when dirty.

Technology Explained Simply
The exhaust filter operates as a mechanical filter that traps particles in the air flowing through the enclosure. Air is passed through the filter, where dust and other particles adhere to the filter fibers. Filtration performance depends on the filter type (here, pleated filter) and the materials used. Protection class IP 54 is achieved when the filter is operated with a nonwoven filter or pleated filter. With a pleated filter and an absorber mat, protection class IP 55 can be reached. Using a pleated filter and a spray water hood enables protection class IP 56. Protection class NEMA Type 12 is achieved when the filter is operated with a nonwoven or pleated filter. For higher protection requirements such as Type 3, 3R, 4, and 4X, combination with a spray water hood is required.

Compatibility and Accessories
The exhaust filter is specifically designed for filter fan models SK 3243.7xx, 3243.9xx, 3244.7xx, 3244.9xx, and 3245.9xx. It is not suitable for other series. As accessories, replacement filter mats (available in packs of 5 or 50) are available for filtration. A spray water hood made of stainless steel can be used to increase the protection class. A blanking cover for the mounting cutout is also available if the filter is not needed. Additionally, special pleated filters IP55 and pleated filters IP54 are available for filter fans and exhaust filters, which can be exchanged depending on requirements. An absorber mat IP55 is also available to increase the protection class.

Installation and Mounting
Mounting is tool-free at the designated location in the enclosure. The mounting cutout measures 292 mm in width and height. The snap hooks allow for quick and secure fastening. After installation, the filter can be easily opened to replace the pleated filter. Installation typically requires no additional tools, reducing installation time.

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Operational Advantages
Using the exhaust filter ensures continuous air purification, minimizing contamination inside the enclosure. Tool-free mounting and easy filter replacement reduce maintenance time. Achieving various protection classes (IP 54, IP 55, IP 56, as well as NEMA Type 12, 3, 3R, 4, 4X) allows flexible adaptation to different environmental conditions. The use of replacement filter mats and additional components such as spray water hoods or absorber mats expands application possibilities and increases system lifespan. The RAL 7035 color ensures visual harmony with other enclosure components.

Delivery Contents
The delivery includes the exhaust filter and a pleated filter. No other components, such as batteries, are included. Replacement filter mats, spray water hoods, blanking covers, and absorber mats are available separately and are not included in the delivery scope.

Note: The references to width (292 mm vs. 323 mm) and height (292 mm vs. 323 mm) in the sources refer to different measurements — the mounting cutout is 292 mm, while the external dimensions of the filter are 323 mm. This distinction is accounted for in the text.