Lennox Hearth Products 1003C Installation And Operation Manual Download Page 13

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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.