FE
5. Measure the distance as indicated in the figure and subtract 20 mm.
6. Saw the flat duct to size.
7. Install the coupling, the vertical elbow and the flat duct.
HG
8. Measure the distance between the vertical elbow and the cut-out and add 30 mm.
9. Saw the coupling to size. If necessary, use the sawn-off part of the flat channel for this.
10. Make the duct airtight with sealing tape.
11. Place the box.
76
Installation
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