INSTALLATION – COMBUSTIBLE WALL CHIMNEY CONNECTOR PASS-THROUGHS
1. Connectors to a masonry chimney, excepting method B, shall extend in one continuous section through the wall pass-through system
and the chimney wall, to but not past the inner flue liner face.
2. A chimney connector shall not pass through an attic or roof space, closet or similar concealed space, or a floor, or ceiling.
3. Where passage through a wall, or partition of combustible construction is desired, the install ati on shal l conform to CAN/CSA-B365.
Method A. 12 inch (305mm) Clearance to Combustible Wall
Member: Using a minimum thickness 3.5 inch (90 mm ) bric k and
a 5/8 inch (16 mm) minimum wall thickness clay liner, construct a
wall pass-through. The clay liner must conform to ASTM C315
(Standard Specification for Clay Fire Linings) or its equivalent.
Keep a minimum of 12 inches of brick masonry between the clay
liner and wall combustibles. The clay liner shall run from the
brick masonry outer surface to the inner surface of the chimney
flue liner but not past the inner surface. Firmly grout or cement
the clay liner in place to the chimney flue liner.
Method B. 9 inch (229mm) Clearance to Combustible Wall
Member: Using a 6 inch inside diameter, listed, factory-built
Solid-Pak chimney section with insulation of 1 inch (25.4 mm) or
more, build a wall pass-through with a minimum 9 inch air space
between the outer wall of the chimney length and wall combusti-
bles. Use sheet metal supports fastened securely to wall sur-
faces on all sides, to maintain the 9-inch air space. When fas-
tening supports to chimney length, do not penetrate the chimney
liner (the inside wall of the Solid-Pak chimney). The inner end of
the Solid-Pak chimney section shall be flush with the inside of the
masonry chimney flue, and sealed with a non-water soluble re-
fractory cement. Use this cement to also seal to the brick ma-
Method C. 6 inch (152mm) Clearance to Combustible Wall
Member: Starting with a minimum 24 gage (.024 inch [.61 mm ])
6-inch metal chimney connector, and a minimum 24 gage venti-
lated wall thimble which has two air channels of 1 inch each,
construct a wall pass-through. There shall be a minimum 6 inch
separation area containing fiber glass insulation, from the outer
surface of the wall thimble to wall combustibles. Support the wall
thimble, and cover its opening with a 24-gage minimum sheet
metal support. Maintain the 6-inch space. There should also be
a support sized to fit and hold the metal chimney connector. See
that the supports are fastened securely to wall surfaces on all
sides. Make sure fasteners used to secure the metal chimney
connector do not penetrate chimney flue liner.
Method D. 2 inch (51mm) Clearance to Combustible W all Mem-
ber: Start with a solid-pak listed factory built chimney section at
least 12 inches (305mm) long, with insulation of 1 inch (25.4mm)
or more, and an inside diameter of 8 inches (2 inches [51 mm]
larger than the 6 inch chimney connector). Use this as a pass-
through for a minimum 24-gage single wall steel chimney con-
nector. Keep solid-pak section concentric with and spaced 1 inch
off the chimney connector by way of sheet metal support plates
at both ends of chimney section. Cover opening with and sup-
port chimney section on both sides with 24 gage minimum sheet
metal supports. See that the supports are fastened securely to
wall surfaces on all sides. Make sure fasteners used to sec ure
chimney section do not penetrate chimney flue liner.