DuraVent DuraTech Manual de usuario
Installation Instructions
All-Fuel Chimney System
10” to 24” diameter
DuraTech
A MAJOR CAUSE OF VENT RELATED FIRES IS FAILURE
TO MAINTAIN REQUIRED CLEARANCES (AIR SPACES) TO
COMBUSTIBLE MATERIALS. IT IS OF THE UTMOST IMPORTANCE
THAT DURATECH BE INSTALLED ONLY IN ACCORDANCE WITH
THESE INSTRUCTIONS.
NOTE:
Read through all of these instructions
before beginning your installation. Failure
to install as described in this instruction
will void the manufacturer’s warranty, and
may have an effect on your homeowner’s
insurance and UL listing status. Keep these
instructions for future reference.
Dear Customer, Installer, or End User:
I welcome any comments regarding matters
pertaining to our DuraVent products.
I welcome any ideas, input or complaints and
I’ll make sure that someone responds directly
back to you.
Send your emails to:
If you are searching for tech support or product
information, please phone us at 800-835-4429.
Or email us at:
Sincererly,
Steve Eberhard, President and CEO
M&G DuraVent, Inc.
3
CONTENTS
Clearances, Permits, Equipment Needed, Chimney Applications, Notes . . 4
Chimney Diameter, Height & Placement, Enclosure Requirements. . . . . . . 5
Appliance Recommendations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Ceiling Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Elbow Offset Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Tee Supported Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Masonry Fireplace Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Chimney Maintenence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Typical Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
DuraTech
ALL FUEL CHIMNEY SYSTEM FOR 10" 24" DIAMETER
For the most up-to-date installation instructions, see www.duravent.com
4
CLEARANCES
Always allow at least a 2-inch clearance
between DuraTech Chimney Pipe and any
combustible materials. Never ll any required
clearance space with insulation or any other
materials. Combustible materials include
lumber, plywood, sheetrock, plaster and lath,
furniture, curtains, electrical wiring and building
insulation. Keep single wall stovepipe at least
18 inches away from combustible materials,
unless a clearance reduction system that is
acceptable to the authority having jurisdiction
is used, or the appliance to be installed is
listed and the instructions specify a different
clearance.
PERMITS
Contact your local Building Ofcial or Fire
Ofcial regarding permits, restrictions, and
installation inspections in your area.
DURATECH CHIMNEY
APPLICATIONS
DuraTech Chimney 1700°F (10”-24” diameter)
is a complete chimney system tested and
listed to UL Test Procedure 103, and ULC
S604. In the United States, DuraTech
Chimney can be used with wood replaces,
furnaces, boilers, water heaters, ranges, or
other residential-type appliances fueled by oil,
gas, coal, or wood, that have been tested and
listed for use with a UL103 chimney system.
In Canada, DuraTech can be used with oil &
gas red appliances listed for use with a Type
A Chimney, in accordance with ULC S604.
DuraTech Chimney 1700°F is available in
10” through 24” diameters. Do not use with
forced draft, positive-pressure appliances.
The DuraTech Chimney system is designed
to extend vertically with a maximum of one
(1) offset (two elbows total) of up to 30° from
vertical. DuraTech Chimney is listed under UL
Re-examination Service Number MH7399.
EQUIPMENT & MATERIALS
Drill / Driver
Hammer
Caulking Gun
Plumb Bob
Screwdrivers (Phillips & Standard)
Tin Snips
Saber or Keyhole Saw
Level
Dependable Ladder
Tape Measure
Proper Gloves and Shoes
Eye Protection
Materials You May Need:
Non-hardening Waterproof Sealant
8 Penny Nails
#8, 2-1/2” & 1-1/2” Wood Screws
Roong Nails
600OF RTV Silicone Sealant
INSTALLATION NOTES
Proper planning for your DuraTech Chimney
installation will result in greater safety,
efciency, and convenience, as well as
saving time and money. You must use
only authorized DuraTech Chimney parts
to maintain a listed Chimney system (not
including the connector pipe). Do not mix parts
or try to match with other products, or use
improvised solutions. Do not install damaged
or modied parts. Each solid-fuel appliance
must be vented with its own chimney. Table
1 lists the authorized DuraTech Chimney
components. Practice good workmanship.
Sloppy work could jeopardize your chimney’s
safety. Keep electrical wiring and insulation
away from all chimneys and stovepipes. If you
have any questions, be sure to contact either
your dealer or DuraVent directly.
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 replace, 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”-24"
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 diameters 18”-24”
diameters is intended to be mounted directly
to an appliance or masonry replace, 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 modications 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'
6
condensation and creosote formation, and
enhance draft. Include an access door by the
Tee Cap for chimney cleaning (Refer to Fig
18).
APPLIANCE RECOMMENDATIONS
Follow the appliance manufacturer’s
instructions. The requirements stated
below pertain to all appliances installed with
DuraTech Chimney systems.
Choice: Choose an appliance that is listed by
a recognized testing laboratory, is appropriate
for your needs, and is not larger than required.
Installation: Once the chimney system is in
place, install the appliance and stovepipe
(if applicable) as described in the appliance
manufacturer’s instructions. Be sure to
maintain all required clearances.
Flues: Connect only one solid fuel appliance
per chimney.
Operation: Follow the appliance
manufacturer’s instructions and safety manual
for maximum efciency and safety. Overring
can damage the appliance, stovepipe and
chimney, and can void your warrenties.
Fuels: Do not burn driftwood, plastic, or
chemically treated wood such as railroad
ties. They are corrosive to your appliance
and chimney system. Follow the appliance
manufacturer’s instructions and safety manual
in regards to fuels. Not all appliances are
equipped to burn coal. Coal with a low sulfur
content will reduce the possibility of corrosion.
STEP-BY-STEP DIRECTIONS
There are three general types of DuraTech
Chimney installations:
1. Ceiling-supported.
2. Tee-supported (through-the-wall)
3. Masonry Fireplace
Review the step-by-step directions before
beginning your installation.
Figure 2
ATTIC
INSULATION
SHIELD
FIRESTOP
RADIATION
SHIELD
(INSIDE)
ENCLOSURE MUST HAVE 2
INCHES OF CLEARANCE
BETWEEN CHIMNEY AND WALL
SUPPORT BOX
FIRST
FLOOR
OCCUPIED
SECOND
FLOOR
ATTIC
SPACE
least 2 inches (Fig 2).
Multi-Story: Consult local building code
ofcials for requirements in your area. The
National Fire Protection Association Standard
#211 states: “Factory-built chimneys that
pass through oors of buildings requiring
the protection of vertical openings shall be
enclosed with approved walls having a re
resistance rating of not less than one hour
when such chimneys are located in a building
less than 4 stories in height, and not less than
2 hours when such chimneys are located in
a building more than 4 stories in height.” In
Canada, except in single-family and two-family
dwellings, chimneys which extend through
another storey must have an enclosure with a
re resistance rating equal to or greater than
that of the oor or roof assembly through which
they pass.
Cold Climates: In cold climates, chimneys
mounted on an outside wall should be
enclosed in a chase. Exterior chases reduce
7
CEILING SUPPORT
Ceiling supported systems are available for
diameters 10”-24".
1. Place Appliance: Position the appliance
according to the manufacturer’s instructions.
The ue outlet collar should be placed
between the rafters or joists above, if possible.
2. Frame Support Opening: Drop a plumb
bob to the center of the appliance’s ue outlet
and mark this center point on the ceiling. Refer
to Table 2 for specic framing and clearance
dimensions. Mark appropriate cutting lines
around the center point. Cut a square hole in
the ceiling for the Support Box. Frame a level,
square opening centered over the hole which
you have cut. (Figures 3 and 4).
Figure 3
Figure 4
MINIMUM OF 3
INCHES BELOW
FINISHED CEILING
CONNECTOR PIPE
GOING TO
APPLIANCE.
ALWAYS MAINTAIN A
MINIMUM OF 18 INCHES
CLEARANCE TO
COMBUSTIBLES FOR
SINGLE-WALL STOVEPIPE
CHIMNEY CAP
STORM COLLAR
ADJUSTABLE
FLASHING
ATTIC
INSULATION
SHIELD
CHIMNEY
SECTIONS
FRAMED
OPENING
ROUND
SUPPORT BOX
ROUND TRIM
COLLAR
JOISTS &
FRAMING
3-INCH MINIMUM
REQUIRED BELOW
FINISHED CEILING
8
3. Install Support: For installation into a at
ceiling, you need to use the Round Support
Box. The Round Ceiling Support Box has
the option of a square or round Trim Collar
available (Fig 5). The Support Box must
extend at least 3 inches below the nished
ceiling. (do not install beyond 4-1/2” below
nished ceiling or the trim collar will not cover
Figure 5
Figure 6
ROUND SUPPORT
BOX WITH SQUARE
TRIM COLLAR
2 INCH MINIMUM
CLEARANCE TO
INSIDE OF ENCLOSURE
FRAMED
ENCLOSURE
MINIMUM OF 3 INCHES
BELOW FINSHED CEILING
CONNECTOR PIPE
TO APPLIANCE.
MAINTAIN AT
LEAST 18 INCH
FOR SINGLE WALL
STOVEPIPE
CAP
ADJUSTABLE
FLASHING
STORM
COLLAR
SQUARE
TRIM
FRAMED
OPENING
ROUND
SUPPORT BOX
CHIMNEY
SECTION
FIRESTOP
RADIATION
SHIELD
ATTIC
INSULATION
SHIELD
CHIMNEY
SECTIONS
9
properly). Level the Support Box and secure
it to the framing using at least three 8-penny
nails per side (min. of 12 total). Wrap the
straps of the Support Box around the framing
members (Fig 4), and secure with (2) 8-penny
nails per side. (eight nails total) Alternatively,
you may use 1-1/2” #8 wood screws (min. of
12 total for the Support Box, and 8 total for
the straps), instead of nails. Next, secure
the round or square Trim Collar to the ceiling/
framing members using (4) 1” long, round-
head wood screws.
4. Frame Openings: Frame openings in
each ceiling or oor above the Support Box
(Fig 6). These openings are to hold the
Firestop Radiation Shield and Attic Insulation
Shield. Locate each opening by dropping a
plumb bob to the four corners of the opening
below. Maintain the minimum clearances and
dimensions as specied in Table 2. If Elbows
must be used to avoid an obstruction, refer to
the Offset Elbow Installation section.
5. Cut Roof Opening: Cut an opening in the
roof directly above the opening below, and
at least 4 inches larger than the chimney’s
outside diameter to provide at least a
2-inch clearance all around the chimney.
The chimney must be centered within this
opening and maintain the 2-inch clearance to
combustibles. Figure 7
Table 2
Inside Square Framing Dimensions
(X" x X")
Chimney Diameter 10" 12" 14" 16" 18" 20" 22" 24"
CHIMNEY INSIDE DIAMETER16 1/4" 18 1/4" 20 1/4" 22-1/4" na na na na
WALL THIMBLE 16" 18" 20" 22" na na na na
FIRESTOP RADIATION SHIELD
16" 18" 20" 22" 24 1/4" 26 1/4" 28 1/4" 30 1/4"
ATTIC INSULATION SHIELD 16 1/4" 18 1/4" 20 1/4" 22 1/4" 24 1/4" 26 1/4" 28 1/4" 30 1/4"
6. Install Firestop Radiation Shield: A Firestop
Radiation Shield is required in multistory
installations at each oor penetration above
that where the Support Box is located.
Example: in a multistory home where the
appliance is on the ground oor (Support
Box is in the 1st oor ceiling), you would
need a Firestop Radiation Shield at the 2nd
oor ceiling, and at the 3rd oor ceiling, etc.,
including where the chimney penetrates into
the attic. Figure 6 shows a typical 2-story
installation with an attic.
FRAMING
FIRESTOP
RADIATION
SHIELD
10
Note: a Firestop Radiation Shield is not
installed where the chimney penetrates
through the roof. Instead, you will need to
install Roof Radiation Shields (required for
18”-24” diameters only - see Step 7) around
the roof joist members. The Firestop Radiation
Shield is installed on the underside of the
ceiling/oor framing, with the cylindrical “tube”
portion of the shield pointing upward (Fig 7).
Use a minimum of either (1) 8 penny nail or (1)
1-1/4” wood screws per corner. Refer to Table
2 for framing requirements.
7. Install Roof Radiation Shields: Roof
Radiation Shields are included with the
Flashing for 18”-24” diameters. Roof
Radiation Shields provide protection for roof
framing members.
Note: Combustible materials will still need to
be a minimum of 2” away from the chimney.
Roof Radiation Shields must be installed with
their face 1/2” off of the roof framing joists (Fig
8). Depending upon the pitch of your roof, trim
the Roof Rafter Shields with tin snips so they
provide complete coverage of the roof framing
exposed to the chimney. Secure the Roof
Radiation Shields to the top of the framing
members using at least (3) nails or screws for
each shield (Fig 8).
8. Assemble Chimney Sections: Lower the
female end of the rst Chimney Section in the
Support Box (Fig 9). Sheet metal screws are
not required between the rst Chimney Section
and the Support Box. For each additional
Chimney Section use the (6) Sheet metal
screws provided to make a secure connection
between the chimney sections (Fig 9). Do not
penetrate the inner liner of the chimney.
9. Install Attic Insulation Shield: Install
the Attic Insulation Shield where the chimney
passes into an attic. It’s purpose is to prevent
debris and building insulation from getting too
close to the chimney (Fig 10). An installed
Figure 8
Figure 9
Figure 10
ATTIC
INSULATION
SHIELD
SUPPORT
BOX WITH
SQUARE
TRIM
CHIMNEY
SECTION
SITS INSIDE
SUPPORT
BOX
INSTALL ROOF RADIATION
SHIELDS WITH A 1/2"
CLEARANCE FROM ROOF
JOIST FACE.
NAILS OR SCREWS
ROOF
JOISTS
ROOF
RADIATION
SHIELDS
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