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Flexmaster as alternate venting
Flexmaster flex venting is approved on all Montigo residential fireplaces.
Flexmaster Flex pipe may be used in any length as long as the respective
vent graph provided in the manual is adhered to. This approval on
Flexmaster Flex includes all and any prepackaged vent kits by Montigo
containing Flexmaster venting. All Montigo prepackaged vent kits may
be used on any Montigo residential unit fireplace. When using a Power
vent you must use Montigo pipe only.
HORIZONTAL FLEX RUN REQUIREMENTS:
Follow venting graph for each model as required. Support horizontal
sections every 2ft to prevent sagging, allow for a ¼" rise per foot of
horizontal. Use high temperature silicone and three (3) screws at
fireplace collar and termination collars. Reduce horizontal run by 36"
for each 90° offset after the first one.
Allow for a ¼" rise per
foot of horizontal
Flex sections can be
connected with a
coupler providing 3
screws are used on
each side and the
seam is sealed with
high temperature
silicone
22
Maintain 2" clearance
from horizontal venting to
combustibles
Ensure spacers are
located at elbows
to avoid the inner
Support horizontal
pipe touching the
section every 2' with
outer and creating
plumbers strapping
a hot spot
VERTICAL THROUGH THE ROOF:
Follow venting graph for each model as required. Use mil pack and
three (3) screws at joints, support horizontal section every 2 ft, use one
half of RHS100 as a firestop when passing through floors and ceilings,
use additional firestops as necessary to keep construction debris and
insulation away from contact with vent.
Must convert from flex to
rigid before termination
Installation
Support straps OR
Support ring and plates
Firestop
Support ring and plates
Support straping
XG0223
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