Lennox International Inc. 1003C - Manual (Page 13)

INSTALLATION - Combustible Wall Chimney Connector Pass-Throughs
PAGE 13
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, or
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 Mem-
ber: 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 Member:
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 be-
tween the outer wall of the chimney length and wall combustibles.
Use sheet metal supports fastened securely to wall surfaces on all
sides, to maintain the 9” (228.6 mm) air space. When fastening
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 ma-
sonry chimney flue, and sealed with a non-water soluble refractory
cement. Use this cement to also seal to the brick masonry pene-
tration.
Method C. 6” (152.4 mm) Clearance to Combustible Wall Mem-
ber: 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 Member:
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 mini-
mum 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 chimney sec-
tion 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 secure chimney section do not
penetrate chimney flue liner. D
C
B
A
Min. 12 in.
(304.8mm)
to Combustibles
Masonry
Chimney
Fire Clay
Liner
Chimney
Connector
Min. Clearance 12 in.
(304.8mm) of Brick
Min. Chimney Clearance to Brick &
Combustibles – 2 in. (50.8mm)
C
h
im
ney Fl
ue
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
Solid-Insulated
Listed Factory-
Built Chimney
Length
Sheet Steel Supports
Chimney Fl
ue
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 Supports
Masonry
Chimney
C
h
im
ney Fl
ue
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.
Masonry
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)