thinner than 26 gage in thickness or non combustible sheet
material not more thicker than 1/2 in.
If it is necessary to pass through combustible walls to
connect the oven to a chimney liner, the following
clearances must be maintained.
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 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.
Giardino Installation and Operating Manual
© Forno Bravo, LLC 2010. All Rights Served.
Ver. 1.2
32
