The maximum length of the duct is deter-
mined by the load losses of the single atta-
ched fittings (excluding the inlet/outlet
stub pipe) and should not be greater than
8.00 mm H
O.
2
To calculate the load loss of the individual fit-
tings attached see Table 2.
TABLE 1
Siting of terminal
A - below openable window
B - below ventilation opening
C - below eaves
D - below balcony (1)
E - from adjacent window
F - from adjacent ventilation opening
G - from horizontal or vertical soil or drain pipes (2)
H - from corner of building
I - from recess in building
L - from ground level or other treadable surface
M - between two terminals set vertically
N - between two terminals set horizontally
O - from a surface facing without openings or terminals
P - as above but with openings and terminals
1) Terminals below a practicable balcony must be located in such a way that the
total path of the smoke from its outlet point from the terminal to its outlet point
from the external perimeter of the balcony, including the height of possible rai-
lings, is not less than 2000 mm.
2) When siting terminals, where materials that may be subject to the action of the
combustion products are present in the vicinity, e.g., eaves, gutters and down-
spouts painted or made of plastic material, projecting timberwork, etc., distan-
ces of not less than 1500 mm must be adopted, unless adequate shielding is
provided to guard these materials.
2. 1 0
POSITIONING
THE OUTLET
TERMINALS
The outlet terminals for forced-draught
appliances may be located in the external
perimeter walls of the building.
Appliances from 7 to 35 kW
(distances in mm)
600
600
300
300
400
600
300
300
300
2500
1500
1000
2000
3000
KEY
1 Inlet/outlet terminal
2 Sectors diaphragm
3 90° elbow MF with point
code 8077407
4a Extension L. 1000 code 8077303
4b Isolated extension L. 1000
code 8077306
5 Locking junction (n. 5) code 8092700
6 90° elbow MF code 8077404
7 Extension L. 135 with point
code 8077304
8 45° elbow MF code 8077406
9 Condensation outlet L. 135
code 8092800
10 Tile with articulated joint
code 8091300
11 Roof outlet terminal L. 1390
code 8091201
12 Tee condensation outlet
code 8093300
To provide some indications of possible solu-
tions, Table 1 gives the minimum distances
to be observed, with reference to the type
of building shown in fig. 12.
Fig. 11
Fig. 12
89