Installation, B. vertical (through-the-roof) installations, Vent restrictors – Montigo C42DV User Manual
Page 8
Page 8
C42-DV Gas Fireplace
®
Part No. XG0119C
Part
Size
5/8 Venting 4/7 Venting
A - Termination
n/a
PVTK-1
MVTK-1
B - Flex sections
12
PFL-1
MFL-1
24
PFL-2
MFL-2
36
PFL-3
MFL-3
48
PFL-4
MFL-4
C - Solid sections
12
EXT-1
MEXT-1
24
EXT-2
MEXT-2
36
EXT-3
MEXT-3
48
EXT-4
MEXT-4
D - Support Ring
& Plate
PSPXT-8
MSPXT-7
E - Firestop
PS-8
FS-7
F - Roof Flashing
(1/12 - 7/12 pt.)
PRF-7
MRF-7
(7/12 - 12/12 pt.)
PRF-12
MRF-12
G - Adaptor
(5/8 - 4/7)
Storm collar
Support ring
MEXT
Solid Section
Roof flashing
30' max.
* Minimum 1" clearance to all combustibles
Support plate
Firestop
Firestop
2' min.
MXT-10
Adaptor
MEXT
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
5/8" with option for 4/7"
n
Vertical rise >12' can be reduced
n
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.
n
Maximum vent height is 35 feet above fireplace.
Note: Flame characteristics will change if the maximum vent height
is used.
n
Minimum clearances 1" from vent to all combustible materials must
be maintained.
Figure 13.a
Straight, vertical venting using required adaptor.
n
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 14a.
Vertical venting with 1 offset (1 offset= two 90° bends).
Rigid Section
A
A.Male/Female
B.Female/Female
C.Male Flue Collar
B
C
Figure 13b.
Reducing Vertical Vent from 5/8" to 4/7".
Vent Restrictors
When venting vertically, Vent Restrictors may be added to enhance the
burn characteristics of the fireplace.
35' max
35' max