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14
Horizontal Termination
Any horizontal termination must fall within the
shaded portion of the vent window graph illustrated
in figs. 9 or 11. For Snorkel Terminations, see below.
Any horizontal termination except a snorkel termination,
must include:
1) Minimum rise of 2 ft.
2) Minimum horizontal run of 12 in. when vertical
run is less than 8 ft.
2) Maximum rise of 35 ft.
3) Maximum horizontal run of 27 ft.
4) No more than four 45° or two 90° Elbows
Follow all termination clearance guidelines as speci-
fied in fig. 19.
The horizontal termination cap must maintain a 3"
clearance to any overhead combustible projections
2 1/2" or less. It must also maintain 12" clearance
from projections exceeding 2 1/2". See fig. 20.
Wall Cut-out Opening: A minimum 10" X 10" (250 mm x
250 mm) square hole is required for proper pipe clear-
ances through a combustible wall. Use a listed wall
thimble for the wall penetration.
DO NOT FILL AIR SPACE WITH ANY TYPE OF INSULATION.
Any horizontal run of vent must have a 1/4" rise for
every foot of run toward the termination cap. NEVER
ALLOW THE VENTING TO RUN DOWNWARD FROM
STOVE TO TERMINATION; DOWNWARD VENT RUNS
TRAP HEAT AND CAUSE HIGH TEMPERATURES TO
DEVELOP WITHIN THE VENT THAT COULD START A
FIRE.
Install a Vinyl Siding Standoff between the vent
termination and an exterior wall covered by vinyl
siding material to prevent potential heat damage to
the siding.
Do not recess the termination cap into a wall or
siding.
Figure 16.
• Minimum vent for horizontal termination.
• 14” Maximum horizontal run directly off rear of stove
with 14” Snorkel termination.
Figure 17. Maximum Horizontal and Vertical Run with 36”
Snorkel Termination.
Max.
6 ft.
183 cm
36 in.
Snorkel
(915 mm)
Figure 18. Corner Installation with 14” Snorkel Termination.
Snorkel Terminations
THE AIR INLET RESTRICTOR MUST BE SET FULLY OPEN
FOR ANY SNORKEL TERMINATION. See Fig. 6, pg. 9.
With a 14” Snorkel:
The horizontal run made directly off the rear of the
stove into a 14” snorkel cap should include no more
than a single 12” straight section as shown in fig. 17.
One 45° Elbow may be used for a corner installation as
shown in fig. 18.
With a 36” Snorkel:
The maximum horizontal run may be no more than
6 ft. (182 cm.)
12 in.
Straight Pipe
Max.
14”
355 mm
Wall Thimble
and Trim Collar
45° Elbow
See Note F
Fig. 20
C
L
14”
355 mm
Max.
12 in.
(305 mm)
12”
Vent
Pipe or
less
57”
(1448 mm)
24 in.
Snorkel
(305 mm)
25 1/2 in.
Snorkel
(648 mm)