11
GF 160 DV IPI 12/17
Vertical Vent Termination
This appliance may be vertically vented through a ceiling
or to a roof termination using the following guidelines:
The termination should fall within the shaded areas of
the grids depicted in the Vent Matrix, fig. 6.2, page 10.
Minimum Vertical Termination is 6 ft.
(183 cm).
Total
run, including offsets, must not exceed
35 ft.
(10.67m).
Vent Terminus Clearance:
In no case shall any
discharge opening on the cap be less than 18 in. (457 mm)
horizontally from the roof surface. See fig. 6.5.
Steep roofs, nearby trees, and predominantly windy
conditions can contribute to poor draft and/or
promote draft reversal. Increasing the height of the
vent may alleviate these conditions.
Use Wall Straps to support an offset pipe run at
intervals of three feet to avoid excessive stress on the
offsets.
A firestop is required at every floor. The floor opening
should be framed to 10" X 10" inside dimension.
Any venting that is exposed in living space above the
first floor must be enclosed. Always maintain the
required 1" clearance from all sides of the vertical vent
system. Insulation in attic space must be retained by
an insulation barrier.
Horizontal Overhang
V
ertical W
all
Termination
Cap
18.
min.
Lowest Discharge
Opening
18 min.
18.
min.
Figure 6.5.
Vertical vent termination height above roof.
FUNCTIONALITY NOTE:
LONG, VERTICAL VENT CONFIGURATIONS MAY
REQUIRE THE APPLIANCE BE OPERATED IN
CONTINUOUS PILOT MODE (CPI) TO ASSURE
ADEQUATE DRAFT AND PROPER PERFORMANCE.
RE-INSTALL THE TOP PLATE BEFORE
CONNECTING VENT TO THE STOVE.
Horizontal Termination
Any horizontal termination must fall within the shaded
portion of the vent window matrix shown in fig.
6.2.
Any horizontally-terminated vent run must include a
minimum 24” (61 cm) vertical rise. See figs. 6.7, 6.8, 6.9.
Horizontal termination requirements:
1) Maximum vertical run is 35 ft. (10.67m)
2) Maximum horizontal run is 20 ft. (6.1 m)
ELBOW RESTRICTION:
Up to two 45° elbows or one 90°
elbow may be used in addition to the first elbow.
The
horizontal run
must be reduced by 5 feet for
each
additional elbow, whether 45° or 90°.
Wall Cut-out Opening:
A minimum 10" X 10" (250 mm
x 250 mm) square hole is required for proper pipe
clearances through a combustible wall.
Horizontal Vent Pipe Clearance to Combustible
Material:
From Top Surface: 2” (51 mm)
From Sides: 1” (25 mm)
DO NOT FILL AIR SPACE WITH ANY TYPE OF INSULATION.
Any horizontal run of vent must be level or have a
1/4 in. rise for every foot of run toward the termination
cap. NEVER ALLOW THE VENTING TO RUN DOWNWARD
FROM STOVE TO TERMINATION; A DOWNWARD VENT
RUN TRAPS HEAT AND CREATES A FIRE HAZARD.
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. 6.11.
45°
Elbow
Wall
Thimble
and Trim
Collar
3 3/8
(86 mm)
3 3/8
(86 mm)
Figure 6.6.
Horizontal termination clearance to exterior corner.
See Note F
Fig. 6.10
See
Fig. 6.2
