user manual

TR008 / 050207.2 DURANGO™ / Page 19
A. Brick Masonry
Minimum 3.5-inch thick brick masonry all framed
into combustible wall with a minimum of 2-inch brick
separation from clay liner to combustibles. The fireclay
liner shall run from outer surface of brick wall to, but
not beyond, the inner surface of chimney flue liner and
shall be firmly cemented in place.
B. Insulated Sleeve
Solid-insulated, listed factory-built chimney length of
the same inside diameter as the chimney connector and
having 1-inch or more of insulation with a minimum
9-inch air space between the outer wall of the chimney
length and combustibles.
C. Ventilated Thimble
Sheet steel chimney connector, minimum 24 gauge in
thickness, with a ventilated thimble, minimum 24 gauge
in thickness, having two 1-inch air channels, separated
from combustibles by a minimum of 6-inch of glass
fiber insulation. Opening shall be covered, and thimble
supported with a sheet steel support, minimum 24 gauge
in thickness.
D. Chimney Section Pass-through
Solid insulated, listed factory-built chimney length with
an inside diameter 2-inch larger than the chimney con-
nector and having 1-inch or more of insulation, serving
as a pass-through for a single wall sheet steel chimney
connector of minimum 24 gauge thickness, with a
minimum 2-inch air space between the outer wall of
chimney section and combustibles. Minimum length of
chimney section shall be 12-inch chimney section spaced
1-inch away from connector using sheet steel support
plates on both ends of chimney section. Opening shall
be covered, and chimney section supported on both
sides with sheet steel support securely fastened to wall
surfaces of minimum 24 gauge thickness. Fasteners
used to secure chimney section shall not penetrate
chimney flue liner.
CHIMNEY CONNECTOR SYSTEMS & CLEARANCES