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READING THE VENTING CHART
The chart below applies to co-axial roof or wall termination.
1. Minimum 24-inch vertical pipe section required right at unit.
2. The total length of the vent pipe cannot exceed 40 feet.
3. The minimum vertical height with roof termination is 6 feet.
4. Any combination of rise and run can be used as long as they are within the allowable limits shown on the
chart below.
5. A maximum of 4 x 90° elbows—or equivalent (2 x 45° = 90°)—can be used. Excludes the 45° take-off elbow
shipped with the appliance.
6. Each 90° elbow installed on the horizontal plane is equivalent to a 3 feet horizontal pipe; therefore, 3 feet must
be subtracted from allowable horizontal run (45° elbow is equivalent to 18" horizontal pipe).
7. All horizontal pipe runs must be graded 1/4 inch per foot upwards in the direction of the exhaust fl ow. The
final pipe length, when terminating through the wall may be graded downwards slightly to prevent water
migration.
8. A restrictor adjustment is required for most installations having a vertical rise—see next section. NOTE: The
restrictor is shipped installed at the exhaust exit of the firebox.
VENTING CHART
4 x 90º ELBOWS MAXIMUM
(or equivalent)
3" min.
above top of
horizontal pipe
1" min.
all around
vertical pipe
V2
Minimum 24" vertical
pipe rise required
V1
supplied with unit.
DO NOT CONVERT
TO REAR OUTLET!
Example 1
V Value = V1 (4') + V2 (3') + V3 (2')= 9'
H Value = H1 (2') = 2'
Restrictor position # 1 required
V3
H1
1" min. around
bottom & sides
of horizontal pipe
Allowable Co-Axial Vent Confi gurations
w
i
h t
e r
40
38
36
34
Position #0
32
30
28
26
Position #3
24
22
20
18
16
14
12
10
8
6
24" minimum
4
vent pipe rise
2
0
2
Restrictor positions
-16-
s
i r t
t c
r o
p
o
s
t i
o i
n
s
NO INSTALLATION
Position #8
No Restrictor
Example 1
NO INSTALLATION
4
6
8
10
12
14
HORIZONTAL RUN (ft)
16
18
20
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