13
ENG
FR
2.8 POSITIONING OF OUTLET
TERMINALS (fig. 11)
The outlet terminal must be flush with the
wall and the inlet terminal must protrude
50 mm (2 in) from the outstide wall at
least.
Outlet terminals for forced draft systems
may be located on the outer walls of the
buildings. Table 2 shows approximate, non-
binding minimum distances to be met for a
building of the type shown in fig. 5. Please
refer to local codes for minimum clearan-
ces.
Fig. 11
To install the tubes in such way protect the
building materials from degradation by fluegas.
MINIMUM DISTANCE mm feet
A - below openable window or door 900 3
B - below ventilation opening (non mechanical) 900 3
C - below eaves 300 1
D - below balcony 300 1
E - from adjacent window or door 900 3
F - from adjacent ventilation opening (non mechanical) 900 3
G - from horizontal or vertical soil or drain pipes (2) 300 1
H - from corner of building 300 1
I - from recess in building 300 1
L-
above a paved sidwalk or a paved driveway that is
located on private property
2100 7
M - between two terminals set vertically 600 2
N - between two terminals set horizontally 600 2
O - from a surface facing without
openings or terminals 2000 6.56
P - as above but with openings and terminals 3000 9.84
1. The vent shall not terminate;
a) directly above a sidewalk or paved driveway that is located between two single - family dwellings
and severs both dwellings;
b) less that 2.1m (7 ft) above a paved sidewalk or a paved driveway that is located on public property;
c) within 1.8 m (6 ft) of a mechanical air-supply inlet to any building;
d) above a meter and regulator assembly within 1.8 m (6 ft) horizontally of the vertical centerline
of the regulator vent outlet to a maximum vertical distance of 4.5 m (15 ft);
e) within 1.8 m (6 ft) of any gas service regulator vent outlet;
f) less than 300 mm (1ft) above grade level plus expected snow level;
g) within 900 mm (3 ft) of a window or door that can be opened in any building, of any non-mechani-
cal air supply inlet to any building, or of any combustion air inlet of any other appliance;
h) Underneath a veranda, porch, or deck unless;
i) the veranda, porch, or deck is fully open on a minimum of two sides beneath the floor;
ii) the distance between the top of the vent termination and the underside of the veranda, porch, or
deck is greater that 300 mm (1ft).
2. When setting terminals, where materials that may be subject to the action of the combustion pro-
ducts are present in the vicinity, e.g., eaves, gutters and downspouts painted or made of plastic mate-
rial, projecting timberwork, etc., distances of not less than 1.5 m (5 ft) must be adopted, unless
adequate shielding is provided to guard these materials.