Urbana U55I Installation Manual page 38

L 7 ft (2.13 m
M
N
O
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 v c
eneRaL enting
The clearance to combustibles must be maintained around any vertical or horizontal vent pipe. The required
clearance changes depending on the size and orientation of the venting used. Refer to table 3 below.
Vent Vertical Pipe to
the Side Walls
8x11
1" (25mm)
Metal-Fab
8x11
Town & 1 ¾" (44mm)
Country
See certified thimbles in venting section and frame accordingly (Table 6). 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. Not all standard 8" thimbles can be used; you MUST
maintain 3" (76mm) clearance above a vent pipe running through a wall.
The framing clearance of the thimble will depend on the size of venting used. Refer to Table 4 for the proper
clearance dimensions. The offset of the thimble must be ABOVE the vent pipe with the gap insulated.
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
c " because the length of the vertical and horizontal
onfIGuratIons
sections dramatically affects the burning efficiency of the fireplace.
Table 4: Thimble Framing Clearances
Vent Size Clearance (Height)
8" x 11"
38
Initial Installation
QUALIFIED INSTALLERS ONLY
)t
7 ft (2.13 m) *t
36 in (76.2 cm)+
12 in (30 cm)*
12 in (30 cm)
:
LeaRances
Table 3: Vent Pipe Minimum Clearances
Horizontal Pipe to
the Sides & Bottom
1" (25 mm)
See figure 55
1 ¾" (44mm)
I - a
nstallatIon llowaBle
Clearance (Width)
16 1/4"
Clearance above paved sidewalk or paved driveway located
on public property.
Clearance under verandah, porch, deck, or balcony.
Clearance horizontally to any surface (such as an exterior
wall) for vertical terminations.
Clearance above roof line for vertical terminations.
Above First Above Subsequent
Elbow Elbows
3" (76 mm)
c -a V
o xIal ent
14 1/4"
Above Horizontal Wall Frame 8"
Vent Pipe (203mm) or less
3" (76 mm) 3" top (76mm)
x"
x"
Figure 61: Thimble Framing