20303735
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VWDV70 Series Gas Fireplace
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FP1179
max bends
VentInG InstaLLatIon
VertIcaL (throuGh-the-rooF)
appLIcatIons
This gas fireplace has been approved for,
•
Vertical installations up to 40' (12 m) in height. Up to
a 10' (3 m) horizontal vent run can be installed within
the vent system using a maximum of two 90° elbows.
Figure 24
note:
Horizontal and vertical sections of this vent system
require a minimum 1" clearance to combustibles at the top,
sides and bottom.
Example:
Elbow 1 = 90°
Elbow 2 = 45°
Elbow 3 = 45°
Elbow 4 = 90°
Total Angular Variation = 270°
36" (914 mm)
Min.
Figure 25 -
Maximum Elbow Usage
FP1179
•
Up to two 45° elbows may be used within the horizontal
run. For each 45° elbow used on the horizontal plane,
the maximum horizontal length must be reduced by 18"
(450 mm).
Example:
Maximum horizontal length
No elbows = 10’ (3 m)
1x45° elbows = 8.5’ (2.6 m)
2x45° elbows = 7’ (2.1 m)
•
A minimum of a 36" (914 mm) vertical rise is required.
•
Two sets of 45°elbows offsets may be used within the
vertical sections. From 0 to a maximum of 8' (2.5 m)
of vent pipe can be used between elbows.
Figure 25
•
The maximum angular variation allowed in the system
is 270°.
Figure 25
FP1183
max height
40' (12 m)
Maximum
Height
12' (3.7 m)
Minimum
Height
10' (3 m)
Maximum
Support Straps
Every 3'
36" (914 mm)
Min.
FP1183
Figure 24 -
Support Straps for Horizontal Runs
