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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 2" 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
* Minimum 2" clearance to all combustibles.
Figure 16. Straight, vertical venting showing required MXT-10
adaptor (supplied with the MVTK-1 termination).
Part No. XG0130
Installation
MVTK-1
MFL-1 (12" length)
MFL-2 (24" length)
MFL-3 (36" length)
MFL-4 (48" length)
MEXT-1 (12" length)
MEXT-2 (24" length)
MEXT-3 (36" length)
MEXT-4 (48" length)
MSPXT-7
FS-7
MRF-7
(1/12-7/12 pt.)
MRF-12
(7/12-12/12 pt.)
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.
* Minimum 2" clearance to all combustibles.
Figure 17. Vertical venting with 1 offset (1 offset= two 90° bends).
* Minimum 2" clearance to all combustibles.
Figure 18. Vertical venting with 2 offsets (1 offset= two 90° bends).
H34D Gas Fireplace
Page 9
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