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126718-01N
19
VENTING INSTALLATION
Continued
Figure 16 - Vertical (Straight) Installation
Figure 17 - Framing the ceiling opening
Install the Vertical Termination Vent System
These instructions should be used as a guideline and do not super-
sede local codes in any way. Install venting according to local codes,
these instructions, the current National Fuel Gas Code (ANSI-Z223.1)
in the USA or the current standards of CAN/CGA-B149.1 in Canada.
Ensure clearances are in accordance with local installation codes and
the requirements of the gas supplier.
Vertical vent systems terminate through the roof. The minimum
vent height above the roof and/or adjacent walls is specified in ANSI
Z223.1 (In Canada, the current CAN/CGA-B149.1 installation code)
by major building codes.
Always consult your local codes for specific requirements. A general
guide to follow is the gas vent rule
(see
Figure 22, Page 21
).
The following figures and their associated vertical vent tables illus-
trate the various configurations that are possible for use with these
fireplaces.
Vertical (Straight) Installation
1. Determine the number of straight vent sections required.
See
Effective Vent Length on Table 2, Page 16
for more
information. Plan the vent lengths so that a joint does not
occur at the intersection of ceiling or roof joists.
Vertical (Offset) Installation
1. Analyze the vent route and determine the number of vent
sections and elbows required
—See Effective Vent Length
on
Table 2, Page 14
for more information. Plan the venting
so that a joint does not occur in the ceiling or roof joists. Al-
low for elbows
(
Figure 13, Page 17
).
Maintain the minimum
clearances for combustibles
(
Page 9
).
2. Frame the ceiling opening
—Use a plumb line from the ceil-
ing above the fireplace to locate the center of the vertical run.
Cut and/or frame an opening, 10 1/2 x 10 1/2” (267 x 267
mm) inside dimensions, about this center mark
(
Figure 17
).
SV4.5FA or
SV4.5FB Flashing
AND SV4.5SC
Storm Collar
SV4.5VF
Firestop/Spacer
1” (26 mm)
Minimum
Clearance to
Combustibles
SV4.5CGV-1
Termination
SV4.5L6/12/24/36/48
Vent Sections
Max. 40 ft
(12.192 m)
1. Attach the vent components to the fireplace
—See Con-
necting the vent pipe on
Page 17
.
2. Attach the vent components to each other
—See Connecting
the vent pipe on
Page 17
.
3. Install firestop/spacer at ceiling
—Use SV4.5VF firestop/
spacer at ceiling joists. If there is living space above the
ceiling level, the firestop/ spacer must be installed on the
bottom side of the ceiling. If attic space is above the ceiling,
the firestop/spacer must be installed on the top side of the
joist. Route the vent sections through the framed opening
and secure the firestop/spacer with 8d nails or other appro-
priate fasteners at each corner. Remember to maintain 1” (26
mm) clearance to combustibles, framing members, and attic
or ceiling insulation when running vertical chimney sections.
The gap between the vent pipe and a vertical firestop can be
sealed with non-combustible caulking.
4. Support the vertical vent run sections
—Support the vertical
portion of the venting system every 8 ft (2.4 m) above the
fireplace vent outlet. One method of support is by utilizing
field provided support straps (conventional plumber’s tape).
Secure the plumber’s tape to the framing members with nails
or screws. Loop the tape around the vent, securing the ends
of the tape to the framing. If desired, sheet metal screws #6
x 1/2” length may be used to secure the support straps to
the vent pipe
(
Figure 18, Page 20
).
Roof
Framing
Ceiling
Framing
Plumb Bob
10-1/2” (267 mm)
minimum
10-1/2” (267 mm)
minimum
