Montigo B34DV Indoor Installation, Operation & Maintenance Manual page 9

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 18" (1 1/2 feet) from a parapet wall.
Maximum vent height is 32 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 - Stucco Kits
C - Flex Sections
D - Rigid Sections
E - Support Ring
& Plate
F - Firestop
G - Roof Flashing
MEXT/PEXT
MXT-10/PXT-10
Figure 14. Straight, vertical venting showing required MXT-10 adaptor
(supplied with the MVTK-1 termination).
Part No. XG0160 - 141231
Installation
4" / 7" Venting
MVTK-1
MSR (Stucco Frame)
MOSR (Stucco Can)
BSR ( Brick Can)
MFL-1 (12" f/f Section)
MFL-2 (24" f/f Section)
MFL-3 (36" f/f Section)
MFL-4 (48" f/f Section)
MFL-6 (72" f/f Section)
MEXT-1 (12" m/f Section)
MEXT-2 (24" m/f Section)
MEXT-3 (36" m/f Section)
MEXT-4 (48" m/f Section)
MEXT-6 (72" m/f Section)
MSPXT-7
FS-7
MRF-7 (1/12 - 7/12 pt.)
MRF-12 (7/12 - 12/12 pt.)
MEXT/PEXT
A maximum of two offsets (each offset has two 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.
Figure 15. Vertical venting with 1 offset (1 offset= two 90° bends).
Figure 16. Vertical venting with 2 offsets (1 offset= two 90° bends).
B-Series DV-2 Gas Fireplace
Page 9