Montigo MW34 DV - Manual (Page 8)

Page 8 of 21
W3400 Gas Fireplace
Storm collar
Support ring
PEXT
Solid Section
Roof flashing
30' max.
* Minimum 1" clearance to all combustibles
Support plate
Firestop
Firestop
2' min.
PXT-10
Adaptor
PEXT
Flue
Collar
2' min.
Storm collar
Support ring
Roof flashing
30' max.
* Minimum 1" clearance to all combustibles
Support plate
Firestop
Installation
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.
Figure 13. Straight, vertical venting using required PXT-10 adaptor.
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.
A - Termination PVTK-1
B - Flex sections PFL-1 (12" section)
PFL-2 (24" section)
PFL-3 (36" section)
PFL-4 (48" section)
C - Solid sections PEXT-1 (12" section)
PEXT-2 (24" section)
PEXT-3 (36" section)
PEXT-4 (48" section)
D - Support Ring & Plate PSPXT-8 (7" dia.)
E - Firestop PS-8 (7" dia.)
F - Roof Flashing PRF-7 (1/12 - 7/12 pitch)
PRF-12 (7/12 - 12/12 pt.)
PRF-16 (12/12 - 16/12 pt.)
Figure 14b. Vertical venting with 2 offsets.
Figure 14a. Vertical venting with 1 offset.
2' min.
2'
Storm collar
Roof flashing
30' max.
* Minimum 1" clearance to all combustibles
Support straps or
support plate & ring
Firestop
Firestop
Firestop
Support plate
& ring
35' max.
35' max.
Top Vent
35' max.