United States Stove Company 7700 Manual page 25

COMBUSTIBLE WALL CHIMNEY CONNECTOR PASS-THROUGHS
NOTES:
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. A chimney connector shall not pass through an attic or roof space, closet
or similar concealed space, or a floor, or ceiling.
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 (Standard 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 between 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 masonry chimney flue, and sealed with a non-water
soluble refractory 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 gauge (.024" [.61 mm]) 6" (152.4 mm) metal chimney
connector, and a minimum 24 gauge 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-gauge 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 minimum 24-gauge 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 section on both sides with 24 gauge
minimum sheet metal supports. See that the supports are fastened securely to
wall surfaces on all sides. Make sure fasteners used to secure chimney flue do
not penetrate flue liner.
25
15