DuraVent DuraTech 5-8 - Manual (Page 23)

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Length together, compressing the insulation
to achieve the desired length. Important: the
outer walls of the two sections must overlap a
min of 2” to ensure a proper connection. When
at the correct length, secure the two sections
together with (4) sheet metal screws provided.
4. Twist lock the Adjustable Length into the
DuraTech chimney system. The Adjustable
Length is not intended to support chimney
either above or below. If the Adjustable Length
is installed in a system with more than 4-ft of
chimney above or below it, install a supporting
component (Elbow Strap, Tee Support, etc) im-
mediately above/below the Adjustable Length
to carry the additional weight of the chimney.
has built up. Check spark arrestor screens at
least every 2 to 4 weeks. If creosote or soot has
accumulated, it should be cleaned or replaced to
reduce the risk of chimney fire.
4. How to Clean: Have your chimney cleaned
by a Certified Chimney Sweep if you have doubts
about your ability to clean it. Use a plastic,
wood, or steel brush. Do not use a brush that will
scratch the stainless steel liner of your chimney.
Scrub the spark arrestor with a wire brush. To
remove the Chimney Cap for cleaning unscrew
the four (4) screws that attach the cap’s support
legs to the cap base. The Tee Cleanout Cap can
be removed by turning counter-clockwise. Be
sure to replace Tee Cleanout Cap when you are
finished cleaning the chimney.
5. Coal: Warning: Coal with a high sulfur content
can lead to premature failure of the chimney. To
reduce corrosion, clean the chimney thoroughly
within 48 hours of shutting down the stove for the
season. An annual inspection is required.
6. Chemical Cleaners: Use chemical cleaners
only as a last resort, and use only those which
the manufacturer specifically warrants as being
noncorrosive to the chimney liner. DuraVent will
assume no liability for damage resulting from the
use of chemical cleaners.
7. In Case of Fire: If a flue fire occurs, close
all appliance air inlets, and call your Fire
Department. Do not use the chimney again, until
it has been inspected for possible damage.
8. Painting: You can coat all exterior metal parts,
with the exception of the Chimney Cap, with high
temperature, rust proof paint. Wash the metal
with a vinegar and water solution before painting.
Painting the chimney will help to increase
chimney life.
9. Creosote Formation: DuraVent assumes
no liability for any structural damage or roof
contamination as the result of creosote formation.
It is the owner’s responsibility to comply with
inspection and cleaning requirements.
Table 4
Required
Total Length
Insulation
Removed
20” - 22”
0 strips
removed
18” - 20”
1 strip
removed
16” - 18”
2 strips
removed
14” - 16”
3 strips
removed
CHIMNEY MAINTENANCE
1. Creosote and Soot: When wood is burned
slowly, it produces tar and other organic vapors,
which combine with expelled moisture to produce
creosote. The creosote vapors condense in the
relatively cool chimney flue of a slow-burning fire.
As a result, creosote residue accumulates on the
flue lining. When ignited, this creosote makes an
extremely hot fire.
2. Access: Chimneys must be installed so that
access is provided for inspection and cleaning.
3. When to Clean: The chimney should be
inspected at least once every month during the
heating season to determine if creosote or soot