Guide

DuraTech
®
Guide
All-fuel, double-wall
chimney system.
UL 103 HT, UL 103,
and ULC S604.
Specications
Applications
5”-8” DuraTech is a double-wall, all-fuel chimney system
for use with wood stoves, fireplaces, furnaces, boilers,
ranges, water heaters, or other appliances fueled by
wood, oil, coal, or gas, and zero-clearance fireplaces that
are factory-built.
Materials and Construction
5”-8” diameter pipe features inner wall of .020” 430 stain-
less steel. Outer wall options of .016” 430 stainless steel
or .021” galvalume steel. A Thermal Tech (refractory)
blanket insulation is encased between walls. Stainless
steel end rings seal the pipe.
DuraTech features light weight insulation, twist-lock
fittings, support boxes with factory installed male end
coupler, elbows with 360° swivel base, select black
finish pipe lengths, five foot length pipe sections, and
adjustable pipe lengths.
Clearances
2” clearance to combustibles.
Shrouds
UL Listed with DuraVent shroud specifications.
Information available online at www.duravent.com or
call and request L157.
Diameters
5”-8”
Listings
c-UL-us Listed to UL 103 HT and ULC S604 (MH7399)
(Stainless steel outer wall required for installation
in Canada).
A double-wall all-fuel chimney for appliances
fueled by wood, oil, coal, or gas.
Designed to stay cool on the outside, to provide a
hot draft on the inside, to boost stove efficiency,
and to provide for a fire-safe design that protects
both the chimney and the building. This double
wall chimney features a flexible refractory insulation
blanket between walls. The refractory insulation is
held securely in place, eliminating hot spots common
with loose fill insulations. In the event of a creosote
fire, the blanket insulation permits the chimney liner
to expand outwards in a radial direction.
DuraVent's DuraTech for wood-burning stoves is built
with a stainless or aluminized steel outer wall and a
stainless steel inner liner. It is insulated with a blanket
insulation. DuraVent’s unique twist-lock design
requires no tools and is easy to install, providing an
exceptionally firm and tight connection.
Chimney Safety
800.835.4429 | 707.446.4740 Fax | www.duravent.com
L923_810007459_Brochure_DuraTech Install Guide_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.
Monday – Friday
5:30am – 4pm PST | 8:30am – 7pm EST
Tel: [phone]
Fax: [phone]
[e-mail]
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Contact
How To Plan Your Installation
Step
1.
Measure the diameter of the appliance flue
outlet. Select chimney and either DVL or Dura-
Black connector stovepipe with the same size
diameter as the appliance flue outlet.
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. Elbows
greater than 30° are not allowed in the United
States. Elbow straps ensure adequate support.
See Figure 2.
Step
5.
Determine the total length of chimney and
stovepipe required for the installation. To calcu-
late the installed per length of 5”- 8” DuraTech
pipe, subtract 1 1⁄4” per joint. For 10”- 24” di-
ameter, subtract 3⁄4” per joint of pipe. Subtract
1 1⁄4” per joint of DuraBlack stovepipe. Subtract
1 1⁄2” per joint of DVL stovepipe. Minimum
chimney height, at sea level, of 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.
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
Installation