3
NT 1786 A – 02/2017
Number of modules based on length for wall-mounted hoods greater than 3000 mm; for dual hoods, the values are
doubled.
Length
3500
4000
4500
5000
5500
6000
Modules
2000 + 1500
2000 + 2000
2000 + 2500
2500 + 2500
2500 + 3000
3000 + 3000
POSITIONING
The minimum installation height of the hood must be 2 metres for a new building and 1.90 metres for a renovated building.
To ensure optimum capture, a minimum overflow system for the hood of 300 mm must be respected on the sides and front
of the range cooker (for versions with visor).
The hood must be suspended using threaded rods with a minimum diameter of 8 mm and a maximum of 10 mm; the number
and positions of the mounting points are shown on the preceding diagrams.
If there are several modules, the kit supplied must be used for mechanical connection; refer to the assembly instructions
contained in the kit.
AIR SYSTEM CONNECTION
This hood must be connected to air extraction and compensation networks made from a rigid, non-combustible material
(material classed A1, formerly M0). The connection between the air extraction and compensation networks and the hood
may be made using a flat take-off or a spigot plate. This take-off or spigot must be attached to the hood using rivets or any
other means of fastening apart from self-tapping or self-drilling screws which could cause injuries during cleaning or
maintenance operations.
If the optional guillotine dampers are fitted, the extraction plenum is supplied with circular cut-outs (355 mm in diameter),
shown on the preceding diagrams; otherwise the plenums are supplied without holes.
The compensation plenums are supplied with circular cut-outs (250 mm in diameter) shown on the preceding diagrams.
The diameter of the extraction network where it joins the hood must be no less than 315 mm. There is a risk of noise
disturbance if this dimension is smaller.
3.
INSTALLATION
module = 2500 or 3000
