W415-1146 / A / 02.16.13
13
EN
3.4 VENT TERMINAL CLEARANCES
INSTALLATIONS
CANADA
U.S.A.
A
12” (304.8mm) 12” (304.8mm) Clearance above grade, veranda porch, deck or balcony.
B
12”
(304.8mm)
Δ
9” (228.6mm)
Δ
Clearance to windows or doors that open.
C
12”
(304.8mm)*
12”
(304.8mm)*
Clearance to permanently closed windows.
D
18”
(457.2mm)**
18”
(457.2mm)**
Vertical clearance to ventilated sof
fi
ts located above the terminal within a horizontal distance of
2’ (0.6m) from the center line of the terminal.
E
12”
(304.8mm)**
12”
(304.8mm)**
Clearance to unventilated sof
fi
t.
F
0” (0mm)
0” (0mm)
Clearance to an outside corner wall.
G
0” (0mm)***
0” (0mm)***
Clearance to an inside
non
-combustible corner wall or protruding
non
-combustible obstructions
(chimney, etc.).
2”
(50.8mm)***
2” (50.8mm)***
Clearance to an inside combustible corner wall or protruding combustible obstructions (vent
chase, etc.).
H
3’ (0.9m)
3’ (0.9m)****
Clearance to each side of the center line extended above the meter / regulator assembly to a
maximum vertical distance of 15’ (4.6m).
I
3’ (0.9m)
3’ (0.9m)****
Clearance to a service regulator vent outlet.
J
12” (304.8mm)
9” (228.6mm)
Clearance to a non-mechanical air supply inlet to the building or a combustion air inlet to any other
appliance.
K
6’ (1.8m)
3’ (0.9m) †
Clearance to a mechanical air supply inlet.-
L
7’ (2.1m) ‡
7’ (2.1m) ****
Clearance above a paved sidewalk or paved driveway located on public property.
M
12”
(304.8mm)††
12”
(304.8mm)****
Clearance under a veranda, porch or deck.
N
16” (406.4mm) 16” (406.4mm) Clearance above the roof.
O
2’ (0.6m) †*
2’ (0.6m) †*
Clearance from an adjacent wall including neighbouring buildings.
P
8’ (2.4m)
8’ (2.4m)
Roof must be
non
-combustible without openings.
Q
3’ (0.9m)
3’ (0.9m)
See chart for wider wall dimensions.
R
6’ (1.8m)
6’ (1.8m)
See chart for deeper wall dimensions. The terminal shall not be installed on any wall that has
an opening between the terminal and the open side of the structure.
S
12” (304.8mm) 12” (304.8mm) Clearance under a covered balcony
Δ
The terminal shall not be located less than 6 feet (1.8m) under a window that opens on a horizontal plane in a structure with three walls and a roof.
*
Recommended to prevent condensation on windows and thermal breakage
**
It is recommended to use a heat shield and to maximize the distance to vinyl clad sof
fi
ts.
***
The periscope requires a minimum 18 inches (457.2mm) clearance from an inside corner.
****
This is a recommended distance. For additional requirements check local codes.
†
3 feet (0.9m) above if within 10 feet (3.1m) horizontally.
‡
A vent shall not terminate where it may cause hazardous frost or ice accumulations on adjacent property surfaces.
††
Permitted only if the veranda, porch, or deck is fully open on a minimum of two sides beneath the
fl
oor.
†*
Recommended to prevent recirculation of exhaust products. For additional requirements check local codes.
††*
Permitted only if the balcony is fully open on a minimum of one side.
12.1D
NOTE: Clearances are in accordance with local installation codes and the requirements of the gas supplier.
COVERED BALCONY APPLICATIONS
††*
Q
MIN
R
MAX
MAX
R
= 3 feet
(0.9m)
= 2 x
IHHW
(4.6m)
Q
ACTUAL
R
Q
S
G
P