3.2 VENT TERMINAL CLEARANCES
INSTALLATIONS
CANADA
U.S.A.
A
12” (30.5cm)
12” (30.5cm)
Clearance above grade, veranda porch, deck or balcony.
B
12”
(30.5cm)
Δ
9” (228.6mm)
Δ
Clearance to windows or doors that open.
C
12” (30.5cm)*
12” (30.5cm)* Clearance to permanently closed windows.
D
18” (45.7cm)** 18” (45.7cm)** Vertical clearance to ventilated soffits located above the terminal within a horizontal distance of
2’ (50.8mm) from the centerline of the terminal.
E
18” (45.7cm)** 18” (45.7cm)** Clearance to unventilated soffit.
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 (chim-
ney, 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 centerline 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” (30.5cm)
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”
(30.5cm)††
12”
(30.5cm)****
Clearance under a veranda, porch, deck or balcony.
N
16” (40.6cm)
16” (40.6cm)
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.
Δ
In a structure with three walls and a roof, the terminal shall not be located less than 6 feet (1.8m) under a window that opens on a horizontal plane.
*
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 soffits.
*** The periscope requires a minimum 18” (45.cm) clearance from an inside corner.
**** This is a recommended distance. For additional requirements check local codes.
†
3 feet 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 floor.
†*
Recommended to prevent recirculation of exhaust products. For additional requirements check local codes.
NOTE: Clearances are in accordance with local installation codes and the requirements of the gas supplier.
R
Q
M
G
P
COVERED BALCONY APPLICATIONS
Q
MIN
R
MAX
MAX
R
= 3 feet
(0.9m)
= 2 x
≤ 15 feet
(4.6m)
Q
ACTUAL
W415-2207 / A / 08.28.17
11
EN
