Installation of sound insulation pipe and storm protection device

• Shortening the sound insulation pipe reduces the values of the standard sound level difference
• If the sound insulation pipe is shortened, move the optional storm protection device approximately to the middle. Ensure vertical installation position. The silicone slats must not hang down due to their own weight. If you remove the storm protection device completely, make sure that the "UP" arrow is still pointing upwards when you put it back in.