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INSTALLATION - Combustible Wall Chimney Connector Pass-Throughs
PAGE 12
NOTES:
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, o
r
a floor, or ceiling.
3. Where passage through a wall, or partition of combustible construction is desired, the installation shall
conform to CAN/CSA-B365.
Method A. 12” (304.8 mm) Clearance to Combustible Wall
Member: Using a minimum thickness 3.5” (89 mm) brick and a
5/8” (15.9 mm) minimum wall thickness clay liner, construct a wall
pass-through. The clay liner must conform to ASTM C315 (Stan-
dard Specification for Clay Fire Linings) or its equivalent. Keep a
minimum of 12” (304.8 mm) 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” (228.6 mm) Clearance to Combustible Wall Mem-
ber: Using a 6” (152.4 mm) inside diameter, listed, factory-built
Solid-Pak chimney section with insulation of 1” (25.4 mm) or more,
build a wall pass-through with a minimum 9” (228.6 mm) air space
between the outer wall of the chimney length and wall combusti-
bles. Use sheet metal supports fastened securely to wall surfaces
on all sides, to maintain the 9” (228.6 mm) 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 refrac-
tory cement. Use this cement to also seal to the brick masonry
penetration.
Method C. 6” (152.4 mm) Clearance to Combustible Wall
Member: Starting with a minimum 24 gage (.024” [.61 mm]) 6”
(152.4 mm) metal chimney connector, and a minimum 24 gage
ventilated wall thimble which has two air channels of 1” (25.4 mm)
each, construct a wall pass-through. There shall be a minimum 6”
(152.4) mm separation area containing fiberglass 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” (152.4 mm) 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” (50.8 mm) Clearance to Combustible Wall Mem-
ber: Start with a solid-pak listed factory built chimney section at
least 12” (304 mm) long, with insulation of 1” (25.4 mm) or more,
and an inside diameter of 8” (2 inches [51 mm] larger than the 6”
[152.4 mm] chimney connector). Use this as a pass-through for a
minimum 24-gage single wall steel chimney connector. Keep
solid-pak section concentric with and spaced 1” (25.4 mm) off the
chimney connector by way of sheet metal support plates at both
ends of chimney section. Cover opening with and support chim-
ney section on both sides with 24 gage minimum sheet metal sup-
ports. See that the supports are fastened securely to wall surfaces
on all sides. Make sure fasteners used to secure chimney section
do not penetrate chimney flue liner.
D
C
B
A
Min. 12 in.
(304.8mm)
to Co
m
bustibles
Masonr
y
Chimney
Fire Clay
Liner
Chimney
Connector
Min. Clearance 12 in.
(304.8mm) of Brick
Min. Chimney Clearance to Brick &
Combustibles – 2 in. (50.8mm)
Chimney Flue
Factory Built
Chimney Length
Air Space – 9 in.
(228.6mm) Min.
Chimney Length
Flush with In-
side of Flue
Min. Clearance
9 in. (228.6mm)
Chimney
Connector
Use Chimney
Mfrs. Parts to
Attach Connec-
tor Securely
Soli
d
-Insulated
Listed Factory-
Built Chimney
Length
Sheet Steel Su
pp
orts
Chimney
Flue
Min. Chimney Clearance from Masonry to Sheet Steel
Supports & Combustibles – 2 in. (50.8mm)
Nonsoluble
Refractory
Cement
Min. Chimney Clearance from Masonry to Sheet Steel
Supports & Combustibles – 2 in. (50.8mm)
Chimney
Connector
2 Air Channels, Each 1
in. (25.4 mm)
Min. 6 in.
(152.4mm) glass
Fiber Insulation
2 Ventilated Air
Channels, Each
1 in. (25.4 mm)
Construction of
Sheet Steel
Sheet Steel Su
pp
orts
Masonr
y
Chimney
Chimney Flue
Min. Chimney Clearance
from Masonry to Sheet
Steel Supports & Com-
bustibles – 2 in.
(50 8 )
Sheet Steel
Supports
Chimney
Connector
Chimney
Section
Air Space – 2 in.
(50.8mm) Min.
Masonr
y
Chimney
Sheet
Steel
Supports
Chimney
Connector
Chimney
Length
1 in. (25.4 mm)
Air Space to
Chimney
Length
Min. Clearance
2 in. (50.8 mm)