TN19 121211-20
11
Through Wall Installations
System A. Minimum 3.5 in. (90 mm) thick brick
masonry wall framed into combustible wall with a
minimum of 12 in. (305 mm) brick separation from
clay liner to combustibles. Fireclay liner (ASTM C
315, Standard Specifi cations for Clay Fire Linings, or
equivalent), minimum 5/8 in. (16 mm) wall thickness,
shall run from outer surface of brick wall to, but not
beyond, the inner surface of chimney fl ue liner and
shall be fi rmly cemented in place.
Clearance: 12 in. (305 mm)
System B. Solid-Insulated, listed factory-built chimney
length of the same inside diameter as the chimney con-
nector and having 1 in. (25.4 mm) or more of insulation
with a minimum 9 in. (229 mm) air space between the
outer wall of the chimney length and combustibles.
The inner end of the chimney length shall be fl ush
with the inside of the masonry chimney fl ue and shall be
sealed to the fl ue and to the brick masonry penetration
with non-water-soluble refractory cement. Supports shall
be securely fastened to wall surfaces on all sides.
Fasteners between supports and the chimney length
shall not penetrate the chimney liner.
Clearance: 9 in. (229 mm)
System C. Sheet steel chimney connector, minimum
24 gauge [0.024 in. (0.61 mm)] in thickness, with a
ventilated thimble, minimum 24 gauge [0.024 in. (0.61
mm)] in thickness, having two 1 in. (25.4 mm) air chan-
nels, separated from combustibles by a minimum of 6
in. (152 mm) of glass fi ber insulation. Opening shall
be covered, and thimble supported with a sheet steel
support, minimum 24 gauge [0.024 in. (0.61 mm))] in
thickness.
Supports shall be securely fastened to wall surfaces
on all sides and shall be sized to fi t and hold chimney
section. Fasteners used to secure chimney section shall
not penetrate chimney fl ue liner.
Clearance: 6 in. (152 mm)
System D. Solid-Insulated, listed factory-built chimney
length with an inside diameter 2 in. (51 mm) larger
than the chimney connector and having 1 in. (25.4mm)
or more of insulation, serving as a pass-through for a
single-wall sheet steel chimney connector of minimum
24 gauge [0.024 in. (0.61 mm)] thickness, with a mini-
mum 2 in. (51 mm) air space between the outer wall
of chimney section and combustibles.
Minimum length of chimney section shall be 12 in. (305
mm). Chimney section concentric with and spaced 1 in.
(25.4 mm) away from connector by means of sheet steel
support plates on both ends of chimney section. Open-
ing shall be covered, and chimney section supported
on both sides with sheet steel supports of minimum 24
gauge [0.024 in. (0.61 mm)] thickness.
Supports shall be securely fastened to wall surfaces
on all sides and shall be sized to fi t and hold chimney
section. Fasteners used to secure chimney section shall
not penetrate chimney fl ue liner.
Clearance: 2 in. (51 mm)
SYSTEM A
SYSTEM B
SYSTEM C
SYSTEM D
