DuraVent DuraTech 10-24 Installation - Manual (Page 5)

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”-16" 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 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'