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© 2021 United States Stove Company
INSTALLATION
shall be sized to fit and hold the chimney section.
Fasteners used to secure chimney sections shall not
penetrate chimney flue liner.
4. Use an 8" inside diameter solid insulated listed
factory-built chimney length which has 1" or more of
solid insulation. The minimum length of this chimney
section shall be 12" and will serve as a pass-through
for the 6" diameter chimney connector. There must
be at least a 12" air space between the outer wall of
the chimney section and any combustible materials.
The chimney section shall be concentric with and
spaced 1" away from the chimney connector by means
of sheet steel support plates on both ends of the
chimney section. The opening in the combustible wall
shall be covered and the chimney section supported
on both sides with sheet steel supports which are at
least 24 gauge (0.024") in thickness. The sheet steel
supports shall be securely fastened to wall surfaces
on all sides and shall be sized to fit and hold the
chimney section. Fasteners used to secure chimney
sections shall not penetrate chimney flue liner.
5. A listed factory-built wall pass-through system
may be purchased and installed according to the
instructions pack aged with it to provide a safe
method of passing the chimney connector through
a combustible wall for connection to a masonry
chimney.
ADDITIONAL REQUIREMENTS
1. Insulation material used as part of wall pass-through
system shall be of noncombustible material and shall
have a thermal conductivity of 1.0 Btu • in./ft.² • °F
(4.88 kg • cal/hr • m² • °C) or less
2. All clearances and thicknesses are minimums: larger
clearances and thickness are acceptable.
3. A chimney thimble, as shown for 3" and 4" above
(Parts C and D respectively of Figure 8) shall be for
types "3" and 4" connections to facilitate removal
of the chimney connector for cleaning. The chimney
thimble shall be of ASTM C315 fireclay with 5/8"
minimum wall thickness, or material of equivalent
durability. The inside diameter of the thimble shall be
sized for the proper snug fit of a 6" diameter chimney
connector pipe. The thimble shall be installed without
damage to the chimney flue. The thimble shall extend
through the chimney wall to, but not beyond, the inner
surface of the chimney flue and shall be permanently
cemented in place with high temperature cement.
4. A chimney connector to a masonry chimney, except
for 2" above (Part B of Figure 8), shall extend through
the wall pass-through system to the inner face of the
chimney flue, but not beyond. It does not have to be
fastened in place so long as it cannot accidently be
pulled out of the chimney or shoved into the chimney
flue. If fasteners are used to secure the chimney
connector to a masonry chimney, the fasteners shall
not penetrate the chimney flue liner.
5. Any material used to close up any opening for the
connector shall be noncombustible.
PART E
In addition to the methods shown by A, B, C, and D, a
listed factory-built wall pass-through system may be
purchased and installed according to the instructions
packaged with it to provide a safe method of passing
chimney connector through a combustible wall for a
connection to a masonry chimney.
CONNECTION OF CHIMNEY CONNECTOR TO A
MASONRY CHIMNEY WHEN CHIMNEY CONNECTOR
DOES NOT PASS THROUGH A COMBUSTIBLE WALL
If the chimney connector does not have to pass through
a combustible wall to get to a masonry chimney, simply
connect the chimney connector directly to the masonry
chimney's chimney thimble as described and shown by
parts C and D. Remember, the chimney connector should
