Brochure

DuraTech
®
DuraTech®
All-fuel, double-wall
chimney system.
UL 103 HT, UL 103 and
ULC S604.
How It Works
The chimney system allows your stove or replace
to exhaust ue gases while a draft creates the draw
that pulls fresh combustion air into the stove. A well
balanced system provides an even, hot re when it
has good draft. The draft suction keeps smoke from
coming into the room. Insulation in the chimney pipe
is important because it helps keep the exhaust hot
until it is expelled outside. Heat in the chimney makes
draft, which pulls in more combustion air. This creates
a hotter re, delivering more heat to the chimney,
resulting in more draft. The size of the ue is important
for the system to work eciently. The appliance
manufacturers installation instructions will indicate
how to size the ue to match the stoves ue collar.
Stovepipe connects to the stove. It is the usually black
interior pipe that transitions from the stove to the
chimney pipe with an adapter. It is not insulated and
cannot penetrate ceilings or walls. Chimney pipe is an
insulated pipe that is rated to pass through walls and
ceilings. In addition to the chimney pipe, supports to
hold the system in place, and shields to protect areas
from combusting, are needed for the system. The
ashing, storm collar and chimney cap are required to
seal the system from moisture penetration.
Chimney Cap
Flashing
Attic Insulation Shield
Ceiling Support Box
Storm Collar
Chimney Pipe
Adjustable Wall Strap
DVL or DuraBlack Pipe
Appliance Adapter
Firestop Radiation Shield
DVL/DuraBlack
Chimney Adapter
Extended Roof Bracket
Step 1.
Measure the diameter of the appliance flue outlet. Select chimney
and DVL, or DuraBlack stovepipe, with the same size flue dimension
as the appliance.
Step 2.
Measure the roof pitch. For example, a 6/12 pitch has a vertical rise of
6” over a horizontal distance of 12”. Select the appropriate flashing.
See Figure 1.
Step 3.
Determine the minimum chimney height above the roof line.
Building codes require a minimum of 3’ above the roof penetration,
and at least 2’ higher, than any portion of a building within 10’.
See Figure 1.
Step 4.
If an offset is required to avoid rafters or other obstructions, measure
the horizontal distance required and the vertical height available.
Both 15° and 30° elbows are available. Please note that 45° elbows
are not allowed in the United States. Use elbow straps to ensure
adequate support. See Figure 2.
Step 5.
Determine the total length of chimney and stovepipe required for the
installation. To calculate the installed per length of 5”- 8” diameter
DuraTech pipe, subtract 1 1⁄4” per joint. Subtract 1 1⁄4” per joint of
DuraBlack stovepipe. Subtract 1 1⁄2” per joint of DVL close clearance
pipe. Minimum chimney height, at sea level for a straight vertical
chimney, is 10’ to 15’ above the appliance outlet. Higher elevations,
or the use of elbows or a tee, will require approximately 30% to 60%
more height to provide for an adequate draft.
Attic Oset
Through-the-Wall
DuraTech
1 DVL or DuraBlack
2 Ceiling Support
3 Wall Thimble
4 Chimney Pipe
5 Attic Insulation Shield
6 Flashing
7 Storm Collar
8 Chimney Cap
9 Elbow
10 Elbow Strap
11 Tee with Tee Cap
12 Tee Support
13 Chase Top Flashing
14 Base Tee / Double Tee
15
Anchor Plate or Anchor Plate
with Damper
16 Roof Support
17 Finishing Collar
18
DVL Adapter, DuraBlack Slip
Connector, or
Snap-Lock Adapter
19 Stove Adapter
• DVL/DuraBlack Chimney Adapter must
be used when connecting DVL pipe to a
Ceiling Support Box or Finishing Collar.
When connecting DuraBlack pipe, a DVL/
DuraBlack Chimney Adapter, DuraBlack
Slip Connector, or Snap-Lock Adapter
must be used.
• Wall Thimble must be installed with an
appropriate length of chimney pipe for all
horizontal through-the-wall installations.
To accommodate thicker walls, the
telescoping pieces of the Wall Thimble
can be separated, and a eld-fabricated
extension may be installed.
• Attic Insulation Shield must be used in
all installations that pass through an attic,
regardless of whether the attic is insulated
or not.
• Firestop Radiation Shield must be used
when a chimney passes through a oor or
ceiling without a support box.
Cathedral Ceiling
6
4
7
16
17
8
1
19
Figure 1
3 FT. MIN.
ABOVE ROOF
PENETRATION
2 FT. MIN. ABOVE
HIGHEST POINT OF
THE BUILDING WITHIN 10 FT.
MINIMUM CHIMNEY HEIGHT REQUIREMENT
12”
10’
6”
Y
X
Figure 2
Typical Installations
Installation
4
2
1
7
6
8
5
14
19
Oil Furnace
Cathedral Ceiling w/
Support Box
7
4
10
9
2
19
7
6
8
5
18
1
4
Attic Oset
How To Plan Your Chimney
Installation
Cathedral Ceiling
Fireplace
(New or retrot)
Oil Furnace
Cathedral Ceiling
w/Support Box
18
1
6
8
4
7
2
4
12
7
13
11
17
8
3
19
1
Through-The-Wall
4
4
7
13
8
15
Fireplace
New or retrot
800.835.4429 | 707.446.4740 Fax | www.duravent.com
L931_810007455_Brochure_DuraTech_07-20-17_V2
Professional Technical Help
DuraVent prides itself on providing the best customer
service and technical support in the industry.
Our Customer Support Team is available to answer
technical questions.
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