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© 2021 United States Stove Company
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 packaged with it to provide a
safe method of passing the chimney connector
through a combustible wall for connection to a
masonry chimney.
Additional requirements pertaining to floor
protection and the above wall pass-through systems:
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/ft² • °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 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 or 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, 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.
If the chimney connector does not have to pass
through a combustible wall to get to a masonry
chimney, connect the chimney connector to the
masonry chimney as shown. The fireclay liner as
shown should be sized for the proper snug fit of a
6” diameter chimney connector pipe. The fireclay
liner should be firmly cemented in place as shown.
As previously stated, any metal prefabricated
chimney this heater is connected to must be a
listed Hi-Temp Type HT Factory Built Residential
Type and Building Heating Appliance Chimney.
When a metal prefabricated chimney is used, the
manufacturer’s installation instructions must be
followed precisely. You must also purchase (from the
same manufacturer) and install the ceiling support
package or wall pass through and “T” section
INSTALLATION
