EMI Shielding Honeycomb Ventilation Panels

Kemtron’s EMI shielding vent panels or attenuvents are made from aluminium honeycomb mounted into a frame. Many aluminium frame styles are available together with different thicknesses and configuration of honeycomb to meet different shielding requirements. Protective grilles are available for vulnerable areas together with dust filtration foams. Many plated or painted finishes can be specified.


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Aluminium honeycomb vent panels for air flow consist of an aluminium honeycomb foil held in a rigid extruded aluminium mounting frame. The foil, formed and laminated into a series of honeycomb cells that are glued and perforated or laser welded at the join, ensures a conductive path at each join. Although the foil is conductive in all directions, to enhance EMI performance, two pieces of honeycomb polarised at 90° to each other are recommended.

Shielding is achieved by using waveguide beyond cut off design principles (Honeycomb Cell dia X length by 4). The frame can be supplied with an integral or separate EMI/RFI gasket and can be treated with a variety of finishes to provide corrosion protection or improve conductivity.

An extensive range of aluminium extrusion mounting frames are available from stock offering a choice of mounting methods and sizes. Available as custom sizes with no additional cost. Frames can be supplied with fixing holes or captive threaded inserts to aid mounting. Honeycomb can be supplied in several configurations to suit different EMI/RFI Shielding performance requirements. Such as straight through, polarized and a choice of cell size.

Standard perforated honeycomb is available with 30˚, 45˚, 60˚ and 90˚ angles from stock and Laser welded aluminium honeycomb is also available to special order.

For vulnerable situations weld mesh or expanded aluminium kick plates can be fitted.

Removable dust filters and integral insect screens can also be provided.

  • Trivalent chromium – Surtec 650
  • Nickel or tin plating
  • Painted finishes
  • Hexavalent chromium – Alocrome 1200

Ventilation panels are designed for use in electronic enclosures where good air flow is required for cooling and ventilation but where EMC compliance must be ensured. Typical applications are:

  • Electronic Enclosures
  • Air Conditioning Units
  • Fan housings
  • EMC Racks
  • Communication shelters
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