30
For the positioning on the wall of the boiler draining ends, in the cases envisaged by the Presidential Decree n.551 of 29/12/99, follow the
distances referred to in the table and in the figure below.
POSITIONING THE TERMINALS FOR "FORCED DRAFT” APPLIANCES
(quoted from UNI 7129)
TERMINAL POSITION
Minimum distances
in mm
Appliances with thermal capacity
over 16 kW and up to 35 kW
Under the window
A
600
Under venting spouts
B
600
Under the gutter
C
300
Under the balcony (1)
D
300
From an adjacent window
E
400
From an adjacent ventilation spout
F
600
From vertical or horizontal pipes or gutters (2)
G
300
From a building corner
H
300
From a building recess
I
300
From the ground or from another floor
L
2200
Between two terminals, vertically
M
1500
Between two terminals, horizontally
N
1000
From a front surface facing without openings or terminals within 3 meters radius from the
fumes outlet
O
2000
Same, but with openings or terminals within 3 meters radius from the outlet of the fumes
P
3000
Notes:
(1) The terminals under a balcony normally used must be placed in a position such that the total fumes path, from the exit point from the
boiler to the outlet positioned outside the balcony perimeter, including the height of any safety balustrade, must be grater than 2000 mm.
(2) In positioning the terminals ensure distances of minimum 500 mm from materials sensitive to the combustion products action (e.g.,
gutters and rainwater gutters made from plastic, wooden shutters, etc.) or take the appropriate measures and shield these materials.
A
B
E
F
M
D
N C
G
L
I H
O
P
