You can create an Air Inlet-Outlet Louver feature in the NX Sheet Metal application as shown in the figure.

To create a Louver:
- Draw a single line on the planar sheet metal face.
- Start the “Louver” command.
Home Ribbon Bar => Punch Group => “Louver” - Select the single line created in step 1.
- Set the Depth and Width values in the “Louver Properties” group.
Note: You can also arrange these settings by dragging the arrowheads in the graphics window. - Set the louver type
- Lanced: Louver ends are open.
- Formed: Louver ends are close.
- If you want to blend Louver edges.
- Open the “Settings” group in the dialog box.
Note: If you can not see the settings group in the dialog box, click on the drop-down arrow under the dialog to open the settings group. - Turn on the checkbox near the “Blend Louver Edges”
- Type a new radius value in the “Die Radius” box.
- Open the “Settings” group in the dialog box.
- The louver preview will be seen in the dialog box.
- Click on the “Ok” button to create Louver and exit from the command.
Note: You can create only one louver at once. To create a louver group, use the pattern command currently hidden in the Sheet metal application.
To create a Louver pattern
- Start the “Pattern Feature” command.
- Select the Louver created.
- Set the “Pattern Definition” (Spacing method, Count, Pitch Distance, etc..)
- Important: Change the “Pattern Method” to “Variational”.
- Click “Ok” in the dialog box or click twice on the middle mouse button to create a pattern.