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F. Use of Flex Vent (SLP-FLEX Series 6-5/8
Inch)
The flex vent must be supported with the spacing between
support intervals not exceeding 4 feet, with no more than
1/2 inch sag between supports.
A support is required at each change in venting direction,
and in any location where it is necessary to maintain the
necessary clearance to combustibles. A simple "up and
out" installation (Figure 4.8) requires only enough support
to maintain the necessary clearance to combustibles.
However, the vent attachment point and the firestop loca-
tion are considered to be supports.
3 in. CLEARANCE
FLEX-VENT
Figure 4.8 Flex Vent Pipe - Generic Fireplace Shown
Majestic • QUARTZ32, QUARTZ36, QUARTZ42 Installation Manual • 2412-980 Rev. Q • 3/19
G. Vent Diagrams
General Rules:
• SUBTRACT 3 ft. from the total H measurement for each
• SUBTRACT 1-1/2 ft. from the total H measurement for
• Rear Vented: A maximum of three 90º elbows (or six 45º
• Top Vented: A maximum of four 90º elbows (or eight 45º
• Elbows may be placed back to back anywhere in the
TERMINATION
CAP
•
• When penetrating a combustible wall, a wall shield
• When penetrating a combustible ceiling, a ceiling firestop
1 in.
CLEARANCE
• Horizontal runs of vent do not require vertical rise;
• Horizontal termination cap should have a 1/4 inch
Figure 4.9 Vent Cap - Generic Fireplace Shown
90º elbow installed horizontally.
each 45º elbow installed horizontally.
elbows) may be used in any vent configuration. Some
elbows may be installed horizontally. See Figure 4.23
and 4.24.
elbows) may be used in any vent configuration. Some
elbows may be installed horizontally. See Figure 4.16
and 4.17.
system.
Any 90º elbow may be replaced with two back to back
45º elbows.
firestop must be installed.
must be installed.
horizontal runs may be level.
downward slant to allow any moisture in cap to be
released. See Figure 4.9.
W
A
L
L
1/4 in. max.
(6 mm)
19
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