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Majestic • MERC32IN, MERC32IL Installation Manual • 2401-980 Rev. L • 1/21
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
½ 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 4.9) requires only enough sup
-
port to maintain the necessary clearance to combustibles.
However, the vent attachment point and the firestop loca
-
tion are considered to be supports.
Figure 4.9 Flex Vent Pipe - Generic Fireplace Shown
3 in. CLEARANCE
TERMINATION
CAP
FLEX-VENT
1 in.
CLEARANCE
E. Measuring Standards
Vertical and horizontal measurements listed in the vent
diagrams were made using the following standards:
• Pipe measurements are shown using the effective length
of pipe. See Section 12.A (Figure 12.1 for DVP, Figure
12.6 for SLP) for information on effective length of pipe
components.
• Horizontal terminations are measured to the outside
mounting surface (flange of termination cap) (see Figure
4.7).
• Vertical terminations are measured to top of last section
of pipe. See Figure 4.8.
• Horizontal pipe installed level with no rise.
MEASURE TO SHADED SURFACE
(OUTSIDE MOUNTING SURFACE)
Figure 4.7 Measure to Outside Mounting Surface
Figure 4.8 Measure to Top of Last Section of Pipe
