Montigo MD44 DV - Manual (Page 8)

Part No. XG0120 Page 8
MD44-DV Direct Vent Vented Fireplace
Installation
Installation Of Vertical Vent DV
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 30 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.
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.
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)
PEXT-6 (72" Section)
D - Support Ring & Plate PSPXT-8 (8" dia.)
E - Firestop PS-8 (8" 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.)
2' min.
Storm collar
Support ring
Roof flashing
30' max.
* Minimum 1" clearance to all combustibles
Support plate
Firestop
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
Figure 15. Vertical venting with 2 offsets (1 offset= two 90° bends).
Figure 14. Vertical venting with 1 offset (1 offset= two 90° bends).
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
Figure 13. Straight, vertical venting using the required PXT-10
adaptor.
Top Vent