41
Initial Installation
QUALIFIED INSTALLERS ONLY
J
12 in (30 cm)
Clearance to non-mechanical air supply inlet to building, or
the combustion air inlet to any other appliance.
K
6 ft (1.83 m)
3 ft (91 cm) above if within 10
ft (3 m) horizontally
Clearance to mechanical air supply inlet.
L
7 ft (2.13 m)t
7 ft (2.13 m)*t
Clearance above paved sidewalk or paved driveway located
on public property.
M
12 in / 30 cm
+
12 in / 30 cm*
+
Clearance under verandah, porch, deck, or balcony.
N
12 in (30 cm)*
Clearance horizontally to any surface (such as an exterior
wall) for vertical terminations.
O
12 in (30 cm)
Clearance above roof line for vertical terminations.
1 In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code.
2 In accordance with the current ANSI Z223.1 NFPA 54, National Fuel Gas Code.
* These numbers are only estimates.
t A vent shall not terminate directly above a side walk or paved driveway that is located between two single family dwellings
and it serves both dwellings.
+ Permitted only if verandah, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
Clearances must be in accordance with local installation codes and requirements of the gas supplier.
NOTE: Venting terminals shall not be recessed into walls or siding.
G
eneRaL
V
entinG
c
LeaRances
:
A 1” (25 mm) clearance to combustibles must be maintained around any vertical vent pipe. Around a
horizontal vent pipe, the clearance to combustibles should be 3” (76 mm) above and 1” (25 mm) on
the sides and bottom. When combustible materials are directly above the first 90°
elbow, 4” (102 mm)
of clearance is necessary.
Table 5. Vent Pipe Minimum Clearances
Vertical Pipe to
the Side Walls
Horizontal Pipe to
the Sides & Bottom
Above First
Elbow
Above Subsequent
Elbows
Above Horizontal
Vent Pipe
Wall Frame 8”
(203mm) or less
Hard
Pipe
1”
(25mm)
1”
(25 mm)
4”
(102 mm)
3”
(76 mm)
3”
(76 mm)
3” top
(76mm)
See certified thimbles in venting section and
frame accordingly (see Figure 57). A thimble will assure
the proper support and spacing requirements for the vent pipe as it passes through the exterior wall.
Installations in Canada require that a wall thimble be used for passing through walls and ceilings. All
sealing and vapour barriers must comply with local building
codes.
The venting configuration depends on the locations of walls,
ceilings, and studs. However, the pipes cannot be of arbitrary
length and arrangement. Certain guidelines have been set in
“
I
nItIal
I
nstallatIon
- a
llowaBle
c
o
-a
xIal
V
ent
c
onFIguratIons
”
because the length of the vertical and horizontal sections
dramatically affects the burning efficiency of the fireplace.
x”
x”
Figure 57. Thimble Framing
WARNING:
-This gas appliance must be direct vented and can’t be
connected to a chimney flue serving a separate solid-burning
appliances.
-Venting terminals cannot be recessed into a wall or siding.
