EMI shielded ventilation panels for ventilation and heating in screened rooms, EMI shielding rooms & Faraday cages
Honeycomb vents are used to shield openings for ventilation or acoustic/visual contact. We can make these vents according to your drawing within a few days, or you can use our standard range from stock.
We can supply Honeycomb vents with frames, pre-drilled with fasteners, or with flow-drilled thread holes. The standard material is aluminium which can be given a nickel finish (or any other finish you choose).
If high shielding levels are required, the use of cross-cell honeycombs is recommended. These are constructed from multiple sections of 6.35 mm or 12.7 mm or 26.3 mm thick honeycombs within a single frame. The shielding performance will improve as airflow is decreased, but not eliminated.
For military applications we make a heavy hot-dip galvanized mild-steel version. Please contact us for more information.
Honeycombs are also frequently used as flow straighteners to create a laminar flow.
Approximately 95% of the honeycomb vents we produce are made to customer specifications.
| Extrusion | Aluminium alloy 6063-T1 QQ-A-200/9 |
|---|---|
| Filter media | Aluminium alloy 5056, per RR-W-365 |
| Honeycomb | Aluminium alloy MIL-C-7438 |
| Grilles | Aluminium alloy 3003-H-14 per QQ-A-359 |
| Finish | Chem film to MIL-C-5541 Class 1A (standard) Also available: Bright tin, Electroless nickel or Chem film – Class 3 |
| EMI (optional) / RFI gasket | Amucor shield 6800 or Knitted wire mesh. |
| Frequency | Field | Single-layer 6.35 mm thick honeycomb material | Cross-cell 6.35 mm thick honeycomb material | Single-layer 12.7 mm thick honeycomb material | Cross-cell 54 mm thick honeycomb material |
| Frames B, C, D, G, L | Frame H | Frames E, F | Frame K | ||
| 200kHz | H | 39 | 71 | 78 | 85 |
| 100MHz | E | 80 | 105 | 100 | 110 |
| 500MHz | P | 55 | 93 | 55 | 95 |
| 2GHz | P | 52 | 94 | 96 | 98 |
| 10GHz | P | 61 | 82 | 80 | 90 |
| These values were measured under laboratory conditions, Honeycomb 80 x 80 mm and with proper gasket material used. In other situations, results may differ. | |||||
Honeycomb ventilation panels Mild steel ventilation panels for EMP
Panels made in different sizes and amounts made according to your drawing
Honeycomb ventilation frame panel type h
| 9520 - EMC Woven mesh ventilation panel |
| 9500 - Honeycomb ventilation panel (1 layer 3.2 cell x 6.35 mm thick honeycomb) |
| 9500 - Honeycomb ventilation panel (2 layers 3.2 cell x 6.35 mm thick honeycomb) |
| 9500 - Honeycomb ventilation panel (1 layer 1.6 cell x 6.35 mm thick honeycomb) |
| 9500 - Honeycomb ventilation panel (1 layer 3.2 cell x 12.7 mm thick honeycomb) |
| 9500 - Honeycomb ventilation panel (1 layer 3.2 cell x 6.35 mm thick honeycomb + 1 layer 45° slant 3.2 cell x 6.35 mm thick honeycomb for water protection) |
| 9500 - Honeycomb ventilation panel (1 layer 45° slant 3.2 cell x 6.35 mm thick honeycomb for water protection) |
| Honeycomb 400 x 400 mm single 3,2 mm cell 12,7 mm thick electric |
| Honeycomb 400 x 400 mm single 3,2 mm cell 12,7 mm thick magnetic |
| Honeycomb 400 x 400 mm cross 3,2 mm cell 25,3 mm thick electric |
| Honeycomb 400 x 400 mm cross 3,2 mm cell 25,3 mm thick magnetic |
Please note : These values are measured under laboratory conditions. Results may vary in other situations.
Option 1 : Through hole/bolt
Option 2: Flow-drilled tap/thread
Our 9500 series framed Honeycomb ventilation panels are generally supplied with a 6800 series Amucor gasket.
This is an EMC gasket with an aluminum alloy. Suitable for most applications. However, due to galvanic corrosion for some applications, the Honeycombs can also be supplied with a 1200 series Metal knit gasket.
Our Honeycomb ventilation panels are usually custom made for our client. However, some common dimensions are in stock. In the standard dimensions table below some common types of Honeycomb ventilation panels are specified to illustrate the required information. Hole diameter P is standard 3.5 mm, with other dimensions possible on request. Also available with screw apertures or inserts.
| Outer dimensions | Mounting holes horizontal | Mounting holes vertical | |||||
| A | B | Holes | D | E | Holes | F | G |
| 150 | 75 | 2 | 40 | 70 | 1 | 37.5 | – |
| 100 | 100 | 1 | 50 | – | 1 | 50 | – |
| 200 | 100 | 3 | 20 | 80 | 1 | 50 | – |
| 125 | 125 | 2 | 20 | 85 | 1 | 62.5 | – |
| 250 | 125 | 3 | 30 | 95 | 1 | 62.5 | – |
| 150 | 150 | 2 | 25 | 100 | 2 | 25 | 100 |
| 300 | 150 | 4 | 30 | 80 | 2 | 25 | 100 |
| 175 | 175 | 2 | 40 | 95 | 2 | 40 | 95 |
| 350 | 175 | 4 | 40 | 90 | 2 | 40 | 95 |
| 200 | 200 | 3 | 40 | 60 | 3 | 40 | 60 |
| 400 | 200 | 5 | 30 | 85 | 3 | 20 | 80 |
| 250 | 250 | 3 | 30 | 95 | 3 | 30 | 95 |
| 300 | 300 | 4 | 30 | 80 | 4 | 30 | 80 |
| 600 | 300 | 7 | 30 | 90 | 4 | 30 | 80 |
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