DuraVent DuraTech 5-8 - Manual (Page 10)

10
Shield must be high enough to cover current or
future insulation. In unoccupied areas where
this shield cannot fit, you must enclose the
chimney in a framed enclosure. If the chimney
is fully enclosed through the unoccupied
space, an Attic Insulation Shield is not
required. If the installation requires the Attic
Insulation Shield, follow the below guidance:
• 8-A. For a 6” Dia DuraTech Chimney system,
if the unoccupied space is immediately above
the square or round support box (if used), the
support box may be used as an Insulation
shield, using the included collar to completely
cover the support box. Important: Ensure
support box height is appropriate to cover
current/future insulation height.
• 8-B1. On Multi-Story installations and
diameters other than 6”, if the Firestop
Radiation Shield extends above the
unoccupied floor, no modifications are
necessary. The Firestop Radiation Shield will
fit inside the stand alone Attic Insulation Shield.
B2. Assemble Chimney Sections until at
least 18 inches of chimney extends above the
Firestop Radiation Shield.
B3. Extend the Firestop Radiation Shield
tube extension (keep at least 1” overlap), and
secure in place using sheet metal screws.
B4. Slip the Attic Insulation Shield over the
Chimney and Firestop Radiation Shield until
the base sits squarely on the framed opening
(Fig.10, 13).
B5. Secure the Attic Insulation Shield to the
top of the framed opening using at least (3)
8-penny nails or (3) #8, 1-1/2” wood screws
per side (Fig.13).
B6. Wrap the Collar of the Attic Insulation
Shield around the chimney and fasten it
loosely. Slide the Collar down to meet the
Attic Insulation Shield. Slip the tab through
the adjacent slot and fold it back to tighten and
secure the Collar (Fig.14).
per corner. Refer to Table 1 for framing
requirements.
7. Assemble Chimney Sections: Lower the
female end of the first Chimney Section in
the Support Box (Fig.12). It will twist-lock
clockwise onto the male end of the Support
Box. Turn Pipe Sections firmly clockwise to
lock them together. Sheet metal screws are
not required, but they may be used to reinforce
the connection, if desired. Use only 1/2” (or
shorter) sheet metal screws. Do not penetrate
the inner liner of the chimney.
8. Install Attic Insulation Shield: The
Attic Insulation Shield is required where
an unenclosed chimney passes into an
unoccupied space. Its purpose is to prevent
current and future combustibles (debris,
insulation, etc.) from getting too close to the
chimney (Fig.13). An installed Attic Insulation
Figure 13
Figure 12
TWIST CLOCKWISE
TO TIGHTEN
ATTIC INSULATION
SHIELD
HEIGHT TO COVER
INSULATION
(CURRENT AND
FUTURE)