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W3400 Gas Fireplace
B. Vertical (Through-The-Roof) Installations
Vertical Terminations must be installed:
•
minimum 2' (two feet) above the highest point where
vent passes through the roof.
•
minimum 6' (six feet) from a mechanical air inlet
•
minimum 3' (three feet) from a parapet wall.
Maximum vent height is 20 feet above fireplace.
Note: Flame characteristics will change if the maximum vent
height is used.
Minimum clearances 1" from vent to all combustible materials
must be maintained.
A - Termination
B - Flex sections
C - Solid sections
D - Support Ring & Plate
E - Firestop
F - Roof Flashing
Storm collar
Roof flashing
35' max.
30' max.
PEXT
PXT-10
Adaptor
Flue
Collar
* Minimum 1" clearance to all combustibles
Figure 13. Straight, vertical venting using required PXT-10 adaptor.
Page 8 of 21
Installation
PVTK-1
PFL-1 (12" section)
PFL-2 (24" section)
PFL-3 (36" section)
PFL-4 (48" section)
PEXT-1 (12" section)
PEXT-2 (24" section)
PEXT-3 (36" section)
PEXT-4 (48" section)
PSPXT-8 (7" dia.)
PS-8 (7" dia.)
PRF-7 (1/12 - 7/12 pitch)
PRF-12 (7/12 - 12/12 pt.)
PRF-16 (12/12 - 16/12 pt.)
2' min.
PEXT
Solid Section
Firestop
Support ring
Support plate
Firestop
Top Vent
A maximum of two offsets with 90° bends may be made and shall not
exceed total length of 25% of the vertical vent height, when measured
center to center of piping.
Example: Typical vent installation.
20' vertical vent
2 - 2' offsets required
25% of 20' = 5' max. offset allowed
This venting configuration meets requirements.
Storm collar
Roof flashing
35' max.
30' max.
* Minimum 1" clearance to all combustibles
Figure 14a. Vertical venting with 1 offset.
Storm collar
Roof flashing
35' max.
30' max.
* Minimum 1" clearance to all combustibles
Figure 14b. Vertical venting with 2 offsets.
2' min.
Support ring
Support plate
Firestop
2' min.
Support straps or
support plate & ring
Firestop
Support plate
& ring
Firestop
2'
Firestop
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