BORETTI M-System MSK-950 Notice D'emploi page 65

Note: The two safety vents are positioned on the back casing, with
diameter of 6mm.
(4) NOTICE OF INSTALLATION
Before installation, please ensure the area is clean to avoid
1.
suction of the remaining bits of broken wood and dust.
2. It cannot share the same air ventilation tube with other
appliance such as gas tube, warmer tube, and hot wind tube.
The bending of ventilation tube should bH 12e, parallel or
3.
above the start point and should be connected to the external
wall.
After installation, make sure that the extractor is level to avoid
4.
grease collection at one end.
5