5
Table 1
DuraTech Cimney Components
12”, 18”, 24” & 36” SectionS
Round ceiling SuppoRt Box
FiReStop Radiation Shield
extended RooF BRacket
elBow attic
tRim collaRS FoR Round
SuppoRt BoxeS
inSulation Shield
adjuStaBle RooF FlaShing
tee with tee cap
wall thimBle
elBow StRap
chaSe top FlaShing
tee SuppoRt
FiniShing collaR
BRacket wall StRap
Flat RooF FlaShing
chimney cap
RooF Radiation ShieldS
anchoR plate
StoRm collaR
CHIMNEY DIAMETER
Follow the appliance manufacturer’s
instructions to determine chimney diameter
and clearances between combustible materials
and your heating appliance. Never choose a
chimney with an inside diameter smaller than
your appliance’s outlet. If you are connecting
to a masonry fireplace, refer to
Table 4
, for
proper sizing. To calculate the chimney’s
outside diameter, add 2 inches to the inside
diameter.
CHIMNEY HEIGHT
The National Fire Protection Association
Standard #211 states: “Chimneys shall extend
at least three feet above the highest point
where it passes through the roof of a building,
and at least two feet higher than any portion
of a building within ten feet.”
(Fig 1)
10”-24"
diameter DuraTech Chimney may be installed
up to 40 feet high when using a Support
Box, and up to 30 feet high when using a
Tee Support. DuraTech in diameters 18”-24”
diameters is intended to be mounted directly
to an appliance or masonry fireplace, and is
limited in height by the allowable weight of the
supporting surface, up to a maximum of 60-ft.
If the chimney extends more than 4 feet above
the roof, an Extended Roof Bracket must be
used. Due to the overlap of the joints, subtract
3/4” from each Chimney Section’s height to
calculate installed height.
CHIMNEY PLACEMENT
When deciding the location of your chimney,
try to avoid modifications to roof beams and
other structural components of the building.
CHIMNEY ENCLOSURE
REQUIREMENTS
Through Rooms:
Interior chimneys shall
be enclosed where they extend through
closets, storage areas, occupied spaces, or
anyplace where the surface of the chimney
could be contacted by persons or combustible
materials. The space between the outer wall
of the chimney and the enclosure shall be at
Figure 1
2 FT. MIN. ABOVE
HIGHEST POINT OF
ROOF WITHIN 10 FT.
3 FT.
MIN.
ABOVE
ROOF
10'
