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Section 3: Venting
The termination location MUST be selected such that it is the highest
point in the venting assembly. It should also be selected such that it
provides the shortest vent run possible. Should it be impossible to ensure
that the termination is the highest point or should it be impossible to
meet the venting guidelines laid out below please contact your Montigo
dealer to discuss power venting options.
Notes For Planning Venting:
• Venting originates from the top of the unit.
• Venting can terminate through the roof or exterior wall.
• For a detailed diagram of allowed termination locations, see
Appendix A.
• Once the termination location has been established refer to the
appropriate section for installation details.
• For Heat Shield requirements see Section 3-3-3.
Restrictor plate Installation
The distinction is supplied with 3 different sized restrictor plates to
improve flame efficiency. The size of restrictor used largely depends
on the number of elbows used in the vent run, as well as vertical rise.
Figure 8.b.b Included Restrictor plates
Included Restrictor plates:
1" Baffle
1.5" Baffle
1.75" Baffle
For horizontally terminated
vent runs:
Shorter runs, or multi elbow
installations would use the
included 1.5'' or 1'' restrictor.
XG0222
Figure 8.b.c Restrictor plate Installation
For vertically terminated
vent runs:
Vertical runs require ordering
the PVVR8 or PVVR15 restrictor.
Lengthy vertical runs will
require the PVVR25 vertical
vent restrictor (all installed at
the termination).
Connection and installation of the vent
components should adhere to the following
guidelines:
• Use any combination of rigid and flex pipe as required and in any
orientation (Male connectors can face in any direction).
• Flex sections may be stretched up to 50% of their total length (e.g.
a 24" section maybe stretched to 36").
• Connect all vent sections using a minimum of three sheet metal
screws on the outer pipe (for rigid lengths).
• Connect all vent sections using a minimum of three sheet metal
screws on the inner AND outer pipe (for flex lengths).
• Ensure the pipe ends male to female slide in a minimum of 1 1/2"
of overlap.
• Ensure all horizontal runs are supported with a minimum of 3
supports per 10' of venting.
• When hanging/supporting venting, ensure that 1" clearance is
maintained on sides and bottom of vent runs and 2" above horizontal
vent runs to any combustible material.
• Rigid pipe may be cut less than half way from the FEMALE END ONLY.
• Flex pipe cannot be cut
• Ensure when cutting sections of rigid pipe to maintain integrity of
internal supports.
• For flex venting, place the springs supplied with the pipe kit, between
the outer and inner pipes to keep the pipes separate and avoid any
possible hot spots.
• Montigo recommends the use of a flex section for the final pipe
connected directly to the fireplace offering greater flexibility of
installation and absorption of movement.
• Firestops must be installed as required by National & local codes.
NOTICE
Under no circumstances
can Montigo flex venting
be cut to accommodate
an installation. Use an
alternative length to
complete your vent run.
IMPORTANT:
Please Refer to your Building Envelope Engineer
or Waterproofing Consultant for a review of ALL
penetrations through exterior walls or the roof.
Installation
13
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