DuraVent duraplus htc User manual

DuraPlus htc



Installation Instructions

A MAJOR CAUSE OF CHIMNEY RELATED FIRES IS FAILURE
TO MAINTAIN REQUIRED CLEARANCES (AIR SPACES)
TO COMBUSTIBLE MATERIALS. IT IS OF THE UTMOST
IMPORTANCE THAT THIS CHIMNEY 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 eect on your homeowner’s
insurance and listing status. Keep these
instructions for future reference.
Applications
DuraPlus HTC is an all-fuel chimney system
for Canada, US, and elsewhere, for appliances
that require a ULC-S629 or UL 103 HT
chimney, including woodstoves; replaces;
appliances using oil, gas, or coal.
Materials and Construction
Double-walled. Thermal Tech II insulation
encased between inner and outer walls of
.020” 430 stainless steel.
Listings
DuraPlus HTC is listed by Intertek and
conforms to the ULC S629 and UL 103
standards.
Dear Customer, Installer, or End User:
We welcome any comments regarding
matters pertaining to our DuraVent
products.
We welcome any ideas, input or
complaints and I’ll make sure that
someone responds directly back to you.
Send your emails to:
[e-mail]
If you are searching for tech support or
product information, please phone us at
800-835-4429.
Or email us at:
[email protected]


CONTENTS
Clearances, Permits, Applications, Equipment & Materials . .. . .. . . . . . . . . 4
Installation Notes, Chimney Height . . . . . . . . . . . . . . . . .. . . . . .. . . . . . . . . . . . 5
Chimney Enclosure Requirements, Installation Types . . . . . . . . .. . . . . . . . . . 6
Ceiling Supported . . . . . . . . . . . . . . .. . . . . .. . . . . .. . . . . .. . . . . . . . . . . . .. . . . . . . 7
Oset Elbow Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . 14
Extended Roof Bracket Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . 15
Roof Supported Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. . 17
Tee-Supported Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . 19
Zero-Clearance Fireplace Installations . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . 24
Connection From Appliance To Chimney System . . . . . .. . .. . . . .. . . . . .. . . . .24
Chimney Maintenance .. . . . . .. . . . . .. . . . . .. . . . . .. . . . . .. . . . . . ... . . . . .. . . . . .26
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . 28
DuraPlus htc
DURAPLUS HTC CANADIAN CHIMNEY, 6”  8” DIAMETER
For the most up-to-date installation instructions, see www.duravent.com


CLEARANCES
Always maintain at least a 2-inch (50 mm)
clearance between DuraPlus HTC Chimney
Pipe and any combustible materials. Never ll
any required clearance space with insulation
or any other materials. Combustible materials
include, but are not limited to, lumber,
plywood, sheetrock, plaster and lath, furniture,
curtains, electrical wiring and building
insulation. Keep single wall stovepipe at least
18 inches (450 mm) 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
dierent clearance.
PERMITS
Contact your local Building Ocial or Fire
Ocial regarding permits, restrictions, and
installation inspections in your area.
DURAPLUS HTC
CHIMNEY APPLICATIONS
DuraPlus HTC Chimney is a complete
chimney system tested and listed by Intertek
to ULC S629 Standard for 650°C Factory-
Built Chimneys for use in Canada, and to
HT requirements of UL 103 Factory-Built
Chimneys for Residential Type and Building
Heating Appliances in the United States.
DuraPlus HTC Chimney is available in 6”, 7”
and 8” (150, 175, and 200 mm) diameters
and can be used with wood stoves, replaces,
reboxes, furnaces, boilers, water heaters,
stoves, ranges, or other residential-type
appliances fueled by oil, gas, coal, or wood,
that require a ULC S629 or UL 103HT chimney
system. Do not use with forced draft or
positive-pressure appliances. The DuraPlus
HTC Chimney system may have a maximum of
two (2) osets (four elbows total).
EQUIPMENT & MATERIALS
Hammer
Drill
Caulking Gun
Plumb Bob/Laser Level
Screwdrivers (Phillips & Standard)
Tin Snips
Saber or Keyhole Saw
Level
Dependable Ladder
Tape Measure
Proper Gloves and Shoes
Eye Protection
Materials You May Need:
500°F (260°C) RTV Sealant
8 Penny Nails
#8, 2-1/2” & 1-1/2” Wood Screws
Roong Nails


6", 12", 18", 24", 36" & 48"
Sections CAS Ceiling Support
15°, 30°, 45° Elbows Firestop Radiation Shield
Tee with Tee Cap Elbow Strap
Square Ceiling Support Box Roof Radiation Shield
Round Ceiling Support Adjustable Roof Flashing
Trim collars for Round Ceiling
Support Flat Roof Flashing
Roof Support Extended Roof Bracket
Trim collar for Roof Support Storm Collar
Adjustable Tee Support Bracket Chimney Cap
Adjustable Wall Strap Finishing Collar
Wall Thimble Transition Anchor Plate
Wall Thimble Extension Base Plate
Reduced Clearance Support Box Adjustable Tee Re-Support
Adjustable Extended Wall Strap Attic Insulation Collar


INSTALLATION NOTES
Proper planning for your DuraPlus HTC
Chimney installation will result in greater
safety, eciency, and convenience, as well
as saving time and money. You must use
only authorized DuraPlus HTC 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 modied parts. Table 1 lists
the authorized DuraPlus HTC Chimney
components. Keep electrical wiring and
insulation away from all chimneys and
stovepipes. If you have any questions, be
sure to contact either your dealer or M&G
DuraVent directly.
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 unless
allowed by local code or specied by your
appliance manufacturer. To calculate the
chimney’s outside diameter, add 4 inches
(100 mm) to the inside diameter.
CHIMNEY HEIGHT
The National Building Code of Canada states:
“1) A chimney ue shall extend not less than
a) 900 mm (3 feet) above the highest point at
which the chimney comes in contact with the
roof, and b) 600 mm (2 feet) above the highest
roof surface or structure within 3 m (10 feet)
of the chimney.” In the US, 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) DuraPlus HTC chimney
can be installed up to 40-feet (12.2 m) when
using a Ceiling Support or single Tee Support.
If using two Tee Supports, DuraPlus HTC
chimney can be installed up to 80-feet (24.4
2 ft (600mm) MINIMUM
ABOVE HIGHEST POINT OF
ROOF WITHIN 10 ft (3m)
3 ft (900 mm)
MINIMUM
ABOVE ROOF
10 ft
(3m)


m). If using a Roof Support, a maximum of 30-
feet (9.1 m)of chimney can be installed. 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 1-1/2
ATTIC SPACE
OCCUPIED
SECOND
FLOOR
FIRST FLOOR
SUPPORT BOX
ENCLOSURE
MUST HAVE
2INCHES 50mm
OF CLEARANCE
BETWEEN
CHIMNEY
AND WALL
FIRESTOP
RADIATION
SHIELD
ATTIC
INSULATION
COLLAR


inches (38 mm) from each Chimney Section’s
height to calculate installed height.
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. There shall be at least 2 inches (50
mm) between the outer wall of the chimney
and the enclosure (Fig 2).
Multi-Story: Except for installation in single-
and two-family dwellings, factory-built
chimneys which extend through any storey
above that which the connected appliance
is located are to be have enclosures having a
re resistance rating equal to or greater than
that of the oor or roof assemblies through
which they pass.
Cold Climates: In cold climates, chimneys
mounted on an outside wall should be
enclosed in a chase. Exterior chases reduce
condensation and creosote formation, and
enhance draft. Include an access door by the
Tee Cap for chimney cleaning (Refer to Fig 22).
INSTALLATION TYPES
There are four general types of DuraPlus HTC
Chimney installations:
1. Ceiling-supported
2. Roof-supported
3. Tee-supported (through-the-wall)
4. Zero-Clearance Fireplace

3” (75
mm)
BELOW
FINISHED
CEILING
SUPPORT
BOX
ATTIC

ATTIC
MINIMUM OF
3INCHES 75mm
BELOW
FINISHED CEILING
18INCHES
450mm
MINIMUM FOR
SINGLEWALL
STOVEPIPE
CHIMNEY CAP
STORM COLLAR
ADJUSTABLE
FLASHING
CHIMNEY
SECTIONS
ATTIC
INSULATION
COLLAR
FRAMED
OPENING
SQUARE
SUPPORT
BOX
REFER TO TABLE 2 FOR
FRAMING DIMENSIONS


Review the step-by-step directions before
beginning your installation.
CEILING SUPPORTED
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: Use a laser
level or 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 framing dimensions. Mark a cutting line
around the center point to the dimension
required in Table 2. 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).
3. Install Support: For installation into a
at ceiling, you may use a Square Ceiling
Support Box, a Round Ceiling Support Box, a
Reduced Clearance Support Box, or the CAS
Ceiling Support. Note: each of the Ceiling
Supports act as a restop at the ceiling level;
an additional restop is not needed at that
level. Each Ceiling Support can support a
maximum of 40-feet (12.2 m) of chimney.
The CAS Ceiling Support is only used when
installing the CAS system. Refer to the
DuraPlus HTC CAS Installation Instructions for
directions on how to install the remainder of
the Combustion Air System. For the Square
Ceiling Support Box, refer to the cathedral
ceiling installation below. The bottom of the
Round Ceiling Support must extend at least
3 inches (75 mm) below the nished ceiling.
Level the Ceiling Support and secure it to the
framing using at least three 8-penny nails per
side (min. of 12 total). Alternatively, you may
use 1-1/2” #8 wood screws (min. of 12 total),
instead of nails. Next, secure the two-piece
Trim Collar to the framing members using
the (6) 1-1/4” long, round-head wood screws
provided (Fig 6).
For installation into a cathedral ceiling, you
must use the Square Ceiling Support Box,
Reduced Clearance Support Box, or the CAS
Ceiling Support and the two-piece Trim. The
bottom of the square portion of the Support
Box must be a minimum of 3 inches (75 mm)
lower than the nished ceiling at the lowest
side of the penetration (Fig 5 & 6). Level the
Support Box . Support Box Guide Rails are
available for Cathedral Ceiling Support Boxes
to help ensure the Support Box is level during
installation. Before installing the Support Box,
align the Guide Rails level onto the Support

DuraPlus HTC Component Framing Dimensions
Square Ceiling Support Box 14-1/2" 370mm
Round Ceiling Support Box 14-1/4" 362mm
Reduced Clearance Support Box 12-1/4" 312mm
CAS Ceiling Support 14-1/2" 370mm
Wall Thimble 14-1/4" 362mm
CAS Wall Thimble 14-1/4" 362mm
Firestop Radiation Shield 14-1/2" 370mm
Reduced Clearance Firestop
Radiation Shield 12-1/4" 312mm

DuraPlus HTC Support Chimney Height Supported
6" 7" 8"
Square Ceiling Support Box 40-ft 40-ft 40-ft
Reduced Clearance Square
Ceiling Support Box 40-ft 40-ft 40-ft
CAS Ceiling Support Box 40-ft 40-ft 40-ft
Round Ceiling Support 40-ft 40-ft 40-ft
Roof Support 30-ft 30-ft 30-ft
Tee Support 35-ft 30-ft 25-ft
Tee Re-Support 30-ft 25-ft 25-ft
Extended Wall Bracket 35-ft 30-ft 25-ft


members using the (6) 1-1/4” long, round
head wood screws provided (see Fig 6).
4. Frame Openings: Cut and frame
additional openings in each ceiling or oor
above the Support Box (Fig 7). Refer to Table
2 for dimensions. These openings are to hold
the Firestop Radiation Shield. Locate each
opening by using a laser level or dropping a
plumb bob to the four corners of the opening
below. If Elbows must be used to avoid
an obstruction, refer to the Oset Elbow
Installation section.
5. Cut Roof Opening: Cut an opening in
the roof directly above the opening below,
and at least 4 inches (100 mm) larger than
the chimney’s outside diameter to provide at
least a 2-inch (50 mm) clearance all around
the chimney. The chimney must be centered
within this opening and maintain the 2-inch
(50 mm) clearance to combustibles.
6. Install Firestop Radiation Shield:
A Firestop Radiation Shield is required
in multistory installations at each oor
penetration above the level at which
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
7 shows a typical 2-story installation with
an attic. Note: a Firestop Radiation Shield is
not installed where the chimney penetrates
through the roof.
The Firestop Radiation Shield is in three parts:
the Firestop Plate, the Radiation Shield, and
the Collar (Fig 8). The plate portion of the
Firestop Radiation Shield is installed on the
underside of the ceiling/oor framing, with
the vertical anges installed upward into
the framing. Use a minimum of either one
8 penny nail or one #8, 1-1/2” wood screws
per corner. The cylindrical “tube” portion of
the Firestop Radiation Shield is then installed
from the oor above, around the chimney
SQUARE CEILING
SUPPORT BOX
FOR FLAT OR
CATHEDRAL
CEILINGS

ROUND CEILING
SUPPORT
WITH TRIM
FOR FLAT CEILINGS
Box on opposite sides. Place the Guide Rails
on the Support Box at the proper height so
the bottom of the Support Box will be at the
correct distance from the ceiling (Fig 7A).
Secure the Guide Rails in place using 4 sheet
metal screws. IMPORTANT: the Guide Rails
are only used to help install the Support Box
level and are not used to help support the
weight of the chimney installation. Secure
the Support Box to the framing using at least
three (3) 8-penny nails per side (minimum
of 12 nails total), or a minimum of (3) #8,
1-1/2” wood screws. Adjust the overlapping
“U-shaped” Trim pieces so they cover the
Support Box, and secure them to the framing
(6) WOOD
SCREWS
(INCLUDED)
SQUARE CEILING
SUPPORT INSTALLED
WITH TRIM
MUST BE
3” (75mm)
MINIMUM
BELOW
CEILING ON
LOWER SIDE
(6) WOOD SCREWS
(INCLUDED)

ROUND CEILING SUPPORT
INSTALLED WITH TRIM



2INCH 50mm
CLEARANCE
TO INSIDE OF
ENCLOSURE
FRAMED
ENCLOSURE
MINIMUM OF
3INCHES 75mm
BELOW
FINISHING CEILING
18INCHES
450mm
MINIMUM
CLEARANCE FOR
SINGLEWALL
STOVEPIPE
CAP
STORM
COLLAR
ADJUSTABLE
VENTILATED
FLASHING
CHIMNEY
SECTIONS
LINES
REPRESENT
FRAMED
ENCLOSURE
ATTIC
INSULATION
COLLAR
ON TOP OF
FIRESTOP
RADIATION
SHIELD
FIRESTOP
RADIATION
SHIELD
CHIMNEY
SECTIONS
SQUARE CEILING
SUPPORT BOX
FRAMED
OPENING
IN CEILING


section, with the bead resting on the circular
opening in the plate (Fig 8). Slide the Collar
down on top of the Radiation Shield to
complete the Firestop Radiation Shield
installation.
For 6" diameter chimney, a Reduced
Clearance Firestop Radiation Shield is
available. This Firestop has the same
dimensions as the Reduced Clearance
Support Box, so it can t between tight
framing members. Important: the 2"
minimum clearance to combustibles
must still be maintained for the rest of the
installation (other than the framing for
the Reduced Clearance Support Box and
Firestops), including the chase enclosure
between the Support Box and the Firestop.
7. Assemble Chimney Sections: Lower
the female end of the rst Chimney Section
in the Support Box (Fig 9). It will twist-lock
clockwise onto the male end of the Support
Box. Turn Pipe Sections rmly clockwise 1/8
of a turn 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” (13 mm), or shorter, stainless
steel sheet metal screws. Do not penetrate
the inner liner of the chimney.
8. Install Attic Insulation Shield: In the attic
space, one of the following methods must be
used to prevent the chimney from contacting
attic insulation:
1. Use the Ceiling Support Box with Collar
2. Use Firestop Radiation Shield with Collar
3. Fully enclose the chimney through the attic
(maintain 2" minimum clearance).
DuraPlus HTC uses either a tall Cathedral
Ceiling Support Box with an Attic Insulation
Collar or a Firestop Radiation Shield with
its own Collar to act as an attic insulation
shield (Fig 10). If needed, the Attic Insulation
Collar can be trimmed to t between framing
members, as long as it still covers the Support
Box or Firestop Radiation Shield. The Support
Box or the Firestop Radiation Shield must be


TWIST CHIMNEY
SECTION CLOCKWISE
TO LOCK INTO
SUPPORT BOX

INSTALL RADIATION SHIELD
FROM ABOVE SO BEAD
RESTS ON FIRESTOP. ADJUST
EXTENSION SHIELD SO TOP
IS ABOVE LEVEL OF ATTIC
INSULATION. PUSH COLLAR
DOWN ONTO EXTENSION TUBE.
FRAMED OPENING
SEE TABLE 2
INSTALL
FIRESTOP
BELOW
FRAMING
WOOD
SCREWS
4 REQ
MIN. 3"
75MM
BELOW
FINISHED
CEILING
SECURE
GUIDE
RAILS TO
SUPPORT
BOX WITH
SHEET
METAL
SCREWS



at least a minimum of 10 inches (250 mm)
high, but must also extend above the level of
the insulation. The Firestop Radiation Shield
has a telescoping extension to reach higher
if needed (maintain a minimum 1" overlap
between the two shield sections). If a taller
height is needed for the Cathedral Ceiling
Support Box, a eld-fabricated extension of
the Box can be made of 26-gauge galvanized
(or heavier) material. Install the attic shield as
follows:
a. Assemble Chimney Sections until at least
15 inches (375 mm) of chimney extends
above the Firestop Radiation Shield or
Cathedral Ceiling Support Box.
b. Verify the height of the Firestop Radiation
Shield or Cathedral Ceiling Support Box is at
least 10 in (250 mm) above the attic framing
and is above the insulation level. Adjust the
Firestop Radiation Shield as needed, or add
an extension to the Support Box.
c. Secure the telescoping Firestop Radiation
Shield in place with at least (2) sheet metal
screws. Verify the telescoping shields overlap
at least 1".
d. Wrap the Attic Insulation Collar or Firestop
Radiation Shield Collar around the chimney
and fasten it loosely. Slide the Collar down
to meet the Firestop Radiation Shield or
Cathedral Ceiling Support Box. Slip the tab
through the adjacent slot and fold it back to
tighten and secure the Collar (Fig 10 & 11).
9. Install Roof Radiation Shield: The Roof
Radiation Shield is only required when
the chimney is enclosed in a chase within
the attic space. It is not required when the
chimney is unenclosed in the attic space.
Center the Roof Radiation Shield in the
opening cut in the roof. Line up the Shield so
the L-Brackets are horizontal, and the Shield
hangs vertically. For sloped roofs, adjust the
position of the L-Brackets so the Radiation
Shield covers the roof framing members.
Verify the height of the Radiation Shield will


PUSH COLLAR DOWN
ONTO SUPPORT
BOX OR FIRESTOP
RADIATION SHIELD
CENTER ROOF
RADIATION
SHIELD AROUND
CHIMNEY AND
SECURE TO ROOF
WITH SCREWS
ADJUST POSITION OF
LBRACKETS SO SHIELD
COVERS FRAMING OF
SLOPED ROOFS. TRIM
SHIELD TO MATCH
FLASHING IF NEEDED.


not interfere with the Roof Flashing. Secure
Roof Radiation Shield to the roof using at (2)
roong nails or (2) #8, 1-1/2” wood screws as
shown in Figure 12.
10. Attach Flashing: In new construction,
assemble the Chimney Sections to a point
above the roof, then slip the Flashing over
the chimney. On an existing roof, center
and install the Flashing before extending
the chimney above the roof. Allow space
to permit sliding the next Chimney Section
up through the Flashing. Always insure
the chimney remains vertical (use a level),
and that at least a 2-inch (50 mm) clearance
to combustible materials is maintained
all around. Install the upper edge of the
Flashing under the roong. Nail to the roof
along the upper edge and down each side
with 1-inch (25 mm) roong nails. Do not
nail the lower edge of the Flashing (Fig 13).
Be sure to follow local building practices,
as needed. Seal all nail heads with a non-
hardening waterproof sealant. On at or
tarred and graveled roofs, nail and seal the
Flat Roof Flashing to the roof on all sides
with roong compound. Do not put screws
through the Flashing into the Chimney Pipe.
11. Finish Top: Apply a high-temperature
(500°F/260°C), non-hardening waterproof
sealant around the chimney at the point
where the Storm Collar will meet the chimney
just above the Flashing. (Fig 13). Slide the
Storm Collar down over the chimney to
the top of the Flashing. Tighten and seal
the Storm Collar against the sealant. After
installing sucient Chimney Sections to meet
the height requirement (Fig 1), attach the
Chimney Cap onto the top of the chimney
by holding the collar of the cap and twist
locking it clockwise onto the chimney. Do
not hold upper portion of the cap and twist,
as this may damage the cap. The Chimney
Cap can be removed for chimney cleaning
as described in the Chimney Maintenance
section of the instructions. Use an Extended
Roof Bracket if the chimney extends more
than 4-feet (1.2 m) above the roof, and
another Extended Roof Bracket for every
additional 4-feet (1.2 m) that the chimney
extends above the roof penetration. (Figures
16 & 17 in the Extended Roof Bracket
section). If you are located in heavy snow
country, thought must be given to protecting
the chimney from damage due to sliding
snow and ice. In these cases, locating the
chimney as close as possible to the ridge
line is recommended. Important: A snow
splitter oers no absolute guarantee against
damage. The best defense against snow
and ice damage is to locate the chimney
out of harm's way, or to remove snow & ice
as required before it can accumulate to a
dangerous level.
12. Enclosures: Enclose chimneys where
they pass through occupied spaces, including
closets. Always maintain at least a 2 inch (50
mm) clearance between the chimney and any
combustible materials. Interior enclosures
may be constructed with standard framing
and sheathed with sheetrock or plywood.
Use Wall Straps at least every 8-feet (2.4
m) to maintain a minimum of 2 inches (50
mm) of air space between the chimney and
combustible materials.



   
ELBOW
DEGREE
CHIMNEY
LENGTH OFFSET INCHES RISE INCHES OFFSET INCHES RISE INCHES OFFSET INCHES RISE INCHES
15 0 1 ½ 12 1 ¾ 13 ½ 1 ¾ 13 ½
30 0 1 ¾ 14 ¼ 3 ¾ 14 ¼ 3 ¾ 14 ¾
45 0 7 ⁄ 19 ⁄ 7 ⁄ 19 ⁄ 7 ⁄ 19 ⁄
15 12 4 ¼ 23 ½ 4 ¼ 20 ½ 4 ¼ 23 ½
30 12 9 24 9 24 9 24
45 12 16 28 ¼ 16 28 ¼ 16 28 ¼
15 24 7 ½ 34 7 ¾ 35 ½ 6 ¾ 35 ½
30 24 15 33 ¾ 15 33 ¼ 14 ¾ 34 ¼
45 24 24 ½ 36 ⁄ 24 ½ 36 ⁄ 24 ½ 36 ⁄
15 36 10 ½ 45 ½ 10 ¾ 46 ¾ 9 ½ 47
30 36 21 44 21 43 ½ 20 ½ 44 ¾
45 36 33 45 ¼ 33 45 ¼ 33 45 ¼
15 48 13 ¼ 55 ½ 13 ½ 57 12 57 ¼
30 48 26 ¼ 53 26 52 ½ 25 ½ 53 ¾
45 48 41 ½ 53 ¾ 41 ½ 53 ¾ 41 ½ 53 ¾

SPLITTER
SPLITTER

USE 1" (25mm)
ROOFING NAILS
ALONG TOP OF
FLASHING
PLACE BEAD OF
SEALANT AGAINST
PIPE NEXT TO TOP OF
FLASHING
FLASHING
PUSH STORM COLLAR
DOWN ONTO
FLASHING AND
SEAL WITH NON-
HARDENING SEALANT


the elbows is limited to no more than 50% of
the overall chimney pipe of the system (e.g.
if the total chimney pipe run is 20-ft, then no
more than 10-ft may be between the elbows).
Important: For each chimney pipe section in
the oset (between the elbows), there must
be an Elbow Strap, Tee Support, or similar
support method to support the weight of the
pipe and to relieve stress on the Elbows.
Attach the second Elbow above the Chimney
Section to complete the oset (Fig 15).
2. Secure Oset: Place the Elbow Strap’s
band around the angled portion of the top
Elbow, then tighten the nut and bolt until
the clamp is rm. Wrap the Elbow Strap end
over an adjacent joist or rafter and secure it
with at least (4) 8-penny nails or (4) #8, 1-1/2
screws. Do not add more Chimney Sections
until the Elbows are supported. Be sure that
the chimney remains vertical. If there is more
than one Chimney Section between the
Elbows, install an additional Elbow Strap for
each chimney section in the oset (Fig 15).
OFFSET ELBOW INSTALLATION
Elbows are manufactured in 15°, 30° and 45°
angles measured from the vertical. A 45°
Elbow is the largest that can be used in an
oset in Canada. In the US, the largest elbow
allowed in an oset is 30º. Elbows may not be
combined to create an oset larger than 30°
in the US or larger than 45° in Canada. Avoid
Elbows if possible, since a totally vertical
chimney is more ecient. When Elbows
are necessary to avoid obstructions such as
rafters, ridgepoles, or joists, use no more than
2 pairs of Elbows (4 elbows total) in any one
chimney system.
1. Attach Elbows: Attach Elbow to Chimney
Section or other Elbow by twisting clockwise
until they lock rmly. As an alternative to
twist locking the elbow onto the pipe section,
you may secure the Elbow in place using
(3) 1/2” (13 mm) sheet metal screws. Attach
one Elbow to the Chimney Section below,
and align it for the oset. Refer to the Oset
Chart to determine the required oset length
and attach an appropriate length (or lengths)
of Chimney Section(s) above the Elbow. The
maximum length of chimney pipe between

ELBOW
ELBOW STRAP
RISE
CHIMNEY
SECTION
OFFSET
NO MORE
THAN 50% OF
THE TOTAL
CHIMNEY
RUN CAN BE
BETWEEN THE
ELBOWS
CHIMNEY
SECTIONS
IN OFFSET
EACH ADDITIONAL
CHIMNEY SECTION
IN THE OFFSET MUST
BE SUPPORTED BY
ELBOW STRAP
ELBOW
ELBOW
STRAP


EXTENDED ROOF
BRACKET INSTALLATION
If the chimney extends more than 4 feet (1.2
m) above the rooine, an Extended Roof
Bracket must be installed every 4 feet (1.2 m)
of chimney height above the rooine, leaving
no more than 4 feet (1.2 m) of chimney
extending above the last pipe bracket. The
Extended Roof Bracket consists of the Pipe
Band, the Adjustable Legs, and the
Roof Brackets. Note: Extended Roof Support
Brackets are not intended to provided
protection against sliding snow & ice. These
supports are intended to provide wind
stabilization for any portion of chimney that
protrudes more than 4-ft above the roof.
1. Mount Pipe Band: Slip the Pipe Band
around the chimney and secure by tightening
the nut and bolt. If the chimney is 7" or 8"
in diameter, add in the corresponding band
section so the Roof Bracket Band wraps
completely around the chimney. If the
chimney is 6" diameter, no additional band
section is needed.
2. Attach the Legs: The Adjustable Legs
of the assembly will adjust from 67” to 114”
(1675 mm to 2850 mm). Secure one end
of the Legs to the Pipe Band using the nuts
and bolts included (1 per Leg). Position the
Adjustable legs so they form approximately
a 60° angle with the chimney, and with each
other (Figures 16 and 17). Be sure that there
is at least 3” (75 mm) of overlap between
the top and bottom halves of the Adjustable
Leg. To secure the legs in place, mount the
Leg Clamp at the position where the two leg
halves overlap and tighten the hardware
provided. It is important to tighten the Leg
Clamp suciently to prevent the two leg rods
from moving.
3. Install Roof Brackets: Mount the two
Roof Brackets where each of the Adjustable
Legs meets the roof, using (6) 1” (25 mm)
roong nails per bracket. Seal the nail heads
carefully with a non-hardening, waterproof

60°
PIPE BAND
AROUND
CHIMNEY
SECTION
ADJUSTABLE
LEGS ADJUST
FROM 67 TO
114 INCHES
(1.7m
to 2.9m)
EXTENDED ROOF
BRACKET ASSEMBLY

CHIMNEY CAP
MUST USE EXT.
ROOF BRACKET
IF OVER 4FT
1.2M
EXTENDED ROOF BRACKET
ADJUSTABLE LEGS



CHIMNEY SECTION
CATHEDRAL CEILING INSTALLATION
ADJUSTABLE
FLASHING
CAP
STORM COLLAR
BOTTOM OF SUPPORT
BOX NEEDS A
MINIMUM OF 3 INCHES
( 75mm) CLEARANCE
TO FINISHED CEILING
18 INCHES (450mm)
MINIMUM CLEARANCE
FOR SINGLE-WALL
STOVEPIPE
SQUARE CEILING
SUPPORT BOX

CHIMNEY
SECTION
FRAMED
OPENING
ADJUSTABLE
FLASHING
CAP
STORM COLLAR
SQUARE CEILING
SUPPORT BOX
BOTTOM OF SUPPORT
BOX NEEDS A
MINIMUM OF 3 INCHES
(75mm) CLEARANCE
TO FINISHED CEILING
18 INCHES (450mm)
MINIMUM CLEARANCE
FOR SINGLE-WALL
STOVEPIPE
LOW ATTIC INSTALLATION
FRAMED OPENING
SEE TABLE 2



sealant. Attach the bottom end of the
Adjustable Legs to the Roof Brackets using
the nuts & bolts provided.
ROOF SUPPORTED INSTALLATIONS
There are two types of Roof Supported
Installations: (1) Using a Square Ceiling
Support Box, a Reduced Clearance Support
Box, or the CAS Ceiling Support, and
(2) Using a Roof Support.
(1) Square Ceiling Support Box
installations: The Ceiling Support Box can
support a maximum of 40-feet (12.2 m) of
DuraPlus HTC chimney. Be sure that the
bottom of the Support Box extends at least
3” (75 mm) below the low side of the nished
ceiling (Fig 18 & 19). The Support Box must
remain level, and the top edge of the box
must cover the edge of the roof’s decking
material. Mobile home chimney installations
are roof supported. Do not seal openings in
ashing.
1. Place Appliance: Place the appliance
in its proper location, referring to the
manufacturer’s instructions as to allowable
distances from combustibles, etc.
2. Cut Openings: Cut a roof opening in
your desired location, just as in a Ceiling-
Supported Installation (Steps 1 through 5). If
a separate ceiling and roof exists, as shown
in Figure 18 (Low Attic), rst cut and frame
a ceiling opening as described in Ceiling-
Supported Installations (Step 2). Refer to
Table 2 for framing dimensions. If it is desired
to install through a cathedral ceiling (Fig 19),
then the hole is cut in the roof.
3. Install Support Box: Slip the Support Box
into the framed opening so the square bottom
projects at least 3 inches (75 mm) below the
nished ceiling and rafters, and extends above
the ceiling to framing or decking materials
that it can be nailed to. Level the Support Box,
and slit the corners to the rooine where they
extend beyond it. Bend the aps (created
by the slitting) ush with the roof, and nail
the Support Box to the roof or framing with
at least three (2) 8-penny nails, or (2) 1-1/2”,
#8 screws, per side (Fig 20). Be sure to keep
the bottom of the Support Box level. To help
keep the Support Box level during installation,
optional Support Box Guide Rails are available.
Place the Guide Rails on the Support Box
at the proper height so the bottom of the
Support Box will be at the correct distance
from the ceiling (Fig 7A). Secure the Guide
Rails in place using 4 sheet metal screws.
IMPORTANT: the Guide Rails are only used
to help install the Support Box level and are
not used to help support the weight of the
chimney installation. Screw the trim sections
into the ceiling (Fig 6).
4. Complete Installation: Refer to Steps 7,
9 & 10 in the Ceiling Supported Installation
section to complete the Roof
Supported installation.
(2) For Roof Support installations: A Roof
Support is also used in installations where
there is a cathedral ceiling, and a Square
Ceiling Support is not desired. The Roof
Support allows the DuraPlus HTC chimney
to come down into the room below the level
of the ceiling (Fig 21). The Roof Support
can support a maximum of 30 feet (9.1 m) of
DuraPlus HTC Chimney total, and maximum
of 20 feet (6.1 m) below the support.


Note: You may not have an oset below the
Roof Support with DuraPlus HTC Chimney
(you may still have an oset with the
connector pipe).
1. Cut and frame opening to provide a
minimum 2” (50 mm) clearance on all sides of
the chimney pipe.
2. If the chimney is 7" or 8" in diameter,
add in the corresponding band section so
the Roof Support Band wraps completely
around the chimney (Fig 21). If the chimney
is 6" diameter, no additional band section is
needed. Bolt on the Roof Support Brackets
to the Roof Support Band using the supplied
hardware. Attach the Roof Support Brackets
to roof using (4) 8 penny nails or (4) #8, 1-1/2”
screws per side (Fig 21).
3. Determine how much DuraPlus HTC
Chimney will be extending into the room
(minimum of 3” (75 mm) below the nished
ceiling). Be sure to maintain the proper
clearance to combustibles (walls and
ceilings) for the connector pipe. Once you
have identied the proper height for your
installation, attach the of the Roof Support
Band to the Chimney Section by tightening
the clamping Bolt, and secure it by using (4)
supplied sheet metal screws through the
Band and into the outer wall of the chimney.
4. Attach desired length of Chimney Sections
above and below the roof level (max. of 30-ft.
(9.1 m) total, max. of 20-ft. (6.1 m) below the
support). Important: for chimney sections
below the roof support, you must use at
least (3) sheet metal screws per joint. To
transition to the connector pipe, attach the
Finishing Collar by twist locking it to the
bottom section of DuraPlus HTC Chimney.
5. Slide the two halves of the Trim Collar
over the DuraPlus HTC Chimney and attach
the Trim Collar to the ceiling using (6) 1-1/4”
screws provided (Fig 21).
6. Refer to Steps 10 & 11 in the Ceiling
Supported Installation section to complete
the Roof Supported installation.

BELOW ROOF VIEW
ROOF SUPPORT
TRIM COLLAR
FINISHING
COLLAR
DURABLACK SLIP
CONNECTO
MAINTAIN MINIMUM
2" (50mm)
CLEARANCE TO
COMBUSTIBLES
THROUGHOUT
PENETRATION
ABOVE ROOF VIEW
ROOF
SUPPORT
SUPPORT
BRACKETS
AND BAND
TIGHTEN BOLT
ON ROOF
SUPPORT
BAND AND
SECURE
IN PLACE
USING 4
SHEET METAL
SCREWS
PROVIDED
USE 4 NAILS
OR SCREWS
ON EACH
SIDE OF
SUPPORT



TALL CONE
FLASHING VENTILATED
CHASE
ENCLOSURE
TEE SUPPORT
BRACKET
(SHOWN
INSTALLED
ABOVE THE TEE)
ACCESS DOOR
FOR CLEANING
TEESUPPORTED INSTALLATIONS
Tee-Supported installations are used when
passing through a wall to an outside chimney.
The Tee Support can hold a maximum of
25 feet (7.6mm) of DuraPlus HTC Chimney.
Additional Tee Supports, Wall Re-Supports,
or Wall Re-Supports can be used to help
support taller chimneys. Each may hold an
additional 25-ft (7.6 m) of chimney pipe. The
Tee Support and Wall Straps are adjustable,
allowing from 2” - 6” (50 mm - 150 mm) of
clearance between the chimney and the wall,
as needed to t your installation. There are
two options when installing a Tee-Supported
installation: the Tee Support above the Tee, or
the Tee Support below the Tee. The required
parts and general conguration are as shown
in Figures 22, 23, 24 and 25.
1. Place Appliance: Position the appliance
according to the manufacturer’s instructions.
It is a good idea to try to position the
appliance so it will allow the chimney to line
up centered between studs.
2. Locate, Cut & Frame Opening:
Determine the location where the
chimney will pass through the wall. The
chimney should pass through the wall,
centered between two studs. The height
of the penetration can be determined by
positioning sections of stove pipe until you
have the desired conguration (refer to
the appliance manufacturer’s installation
instructions for restrictions on stove pipe).
Cut and frame a square opening in the inner
and outer walls at this location. Refer to Table
2 for framing dimensions.
3. Install Back Portion of Wall Thimble:
The Wall Thimble is a two piece unit which
includes the black-painted inside portion,
and the unpainted outside portion (Fig 23
& 24). If installing the CAS Wall Thimble,
refer to the DuraPlus HTC CAS Installation
Instructions for specics on installation of
that system. On the outside wall, install the
back portion of the Wall Thimble. Center
the back portion of the Wall Thimble (with
cylindrical shield inside wall) in the framed
opening of the outside wall. Attach the



CHIMNEY SECTION
AS BRANCH FOR TEE
BACK OUTSIDE
PORTION OF WALL
THIMBLE
WALL THIMBLE EXTENSIONS
IF NEEDED
FRONT INSIDE
PORTION OF WALL
THIMBLE
CHIMNEY
SECTION
CHIMNEY TEE
USE 4 #8 2 ½" SCREWS
PER SIDE TO ATTACH TEE
SUPPORT LEGS TO WALL
TEE CAP
TEE SUPPORT BRACKET

ATTACH BACK OUTSIDE PORTION
OF WALL THIMBLE TO WALL USING
4 #8 1 ½" WOOD SCREWS
CHIMNEY TEE
TEE SUPPORT BRACKET
TEE CAP
WALL THIMBLE EXTENSION
IF NEEDED. SECURE TO BACK
PORTION OF WALL THIMBLE
WITH SHEET METAL SCREWS
TWIST LOCK CHIMNEY SECTION
INTO TEE OPENING
TWIST LOCK FRONT
INSIDE PORTION OF
WALL THIMBLE ONTO THE
BRANCH. WALL THIMBLE
MUST EXTEND 2" 20MM
MINIMUM INTO ROOM
SECURE TRIM PLATE
INCLUDED WITH WALL
THIMBLE TO INSIDE WALL
USING SCREWS ENCLOSED
14 ½" FRAMED
OPENING
ADJUSTABLE
WALL STRAP
OPTIONAL WALL
RESUPPORT