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10
Horizontal Termination
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 vent
manufacturer’s WALL THIMBLE for the wall penetration.
DO NOT FILL AIR SPACE WITH ANY TYPE OF INSULATION.
The minimum horizontal run made directly off the
rear of the stove into a standard horizontal cap shall
be no less than a 6” vent section. See fig. 8.
The maximum horizontal run made directly off the
rear of the stove into a standard horizontal cap (#984
or #985) must include no more than a 12” and 6”
section of Simpson Dura-Vent pipe installed together.
See fig.9.
The maximum horizontal run made directly off the
rear of the stove into a 14” snorkel cap must include
no more than a 24” vent section . See fig. 10.
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. 14.
Any horizontal run of vent must be level or have a
1/4" rise for every foot of run toward the termination
cap. NEVER ALLOW THE VENTING TO RUN DOWN-
WARD FROM STOVE TO TERMINATION; DOWNWARD
VENT RUNS TRAP HEAT AND CAUSE HIGH TEMPERA-
TURES 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.
Options for immediate horizontal venting
directly off the rear of the stove
Figure 8. Minimum Horizontal Run - Standard Termination.
Standard Horizontal
Termination Cap
Min. Horizontal: 6”
No draft restriction required.
5” min.
130 mm
WALL THIMBLE required.
Standard Horizontal
Termination Cap
Max. Horizontal Run:
12”
No draft restriction required.
17” Max.
430 mm
WALL THIMBLE required.
Figure 9. Maximum Horizontal Run - Standard
Termination.
WALL THIMBLE required.
14” Snorkel
Figure 10. Maximum Horizontal Run with Snorkel
Termination.
Max. Horizontal run into a 14”
snorkel: 24”
A draft restrictor is required.
24 3/4”
(630 mm)