Single Wall or Double Wall AL29-4C® or 316L.
Special Gas Vent for Category I, II, III and IV.
TYPE L VENT Low temperature venting system
3” to 24” Diameter Vent For use on Positive, Neutral and
Negative Pressures up to 35” W.C.
Also for venting listed gas or oil fired appliances listed for
venting with TYPE L low temperature venting system
(DSD / DSID ONLY)
MODEL DuraSeal® DS/DSD/DSID
Listed to standards:
UL-1738
ULC-S636
UL-641
ULC-S609
Report # G100215896MTL-006
SUBMITTAL RECORD
PREPARED FOR:
REFERENCE:
LOCATION:
CONTACT:
TELEPHONE:FAX:
EMAIL:
PREPARED BY:
Material Selection
DSD / DSID ONLY
}
FLUE (INNER WALL)
AL29-4C
316L
MODEL DSMODEL DSD
MODEL DSID
Reference to the installation instructions will enable you to obtain a safe,
efficient and dependable installation of this vent system. Please read
and understand these instructions before beginning your installation.
Do not alter or modify the components of this chimney system under
any circumstances. Any modification or alteration of the vent system
or approved accessories, including but not limited to the appliance
it is connected to, may void the warranty, listings and approvals of
this system and could result in an unsafe and potentially dangerous
installation.
A. Examine all components for possible shipping damage prior to
installation;
B. Proper joint assembly is essential for a safe installation. Follow
these instructions exactly as written: Check severeness of joints
upon completion of assembly;
C. This venting system must be free to expand and contract. This venting
system must be supported in accordance with these instructions;
D. Check for unrestricted vent movement through walls, ceilings, and
roof penetrations;
E. Different manufacturers have different joint systems and adhesives.
Do not mix pipe, fittings, or joining methods from different manufacturers.
DuraSeal as a liner ...................................................................... page 12
DuraSeal® single wall (DS) or double wall (DSD) or double wall insulated
(DSID) is a special stainless steel vent system for gas fired appliances listed
as Category I, II, III, and IV or in Canada as Type BH Gas Venting as noted
in ULC-636, with a maximum operating temperature of 550 Degrees F (288
Degrees C), and a maximum rated positive pressure of 35” Water Column. It
can also vent listed gas or oil fired appliance rated to be vent with TYPE L low
temperature venting system (DSD & DSID only). DuraSeal must be installed
by an experienced professional familiar with the operation and maintenance
of heating appliances and venting. Before installing this product, examine all
components for possible shipping damage and read the complete installation
manual. Failure to follow proper installation procedures, including vent pitch
and improper appliance connections, may cause unsafe conditions. DuraVent
recommends the system to be inspected once a year by a qualified service
technician
TESTING / LISTING INFORMATION
DuraVent DuraSeal model DS, DSD and DSID venting system is listed with
Intertek Testing Services (ETL) to UL/ULC standards:
U.S.A.
• UL-1738
Special Gas Vent for Category I, II, III
and IV appliances
• UL-641 (DSD & DSID only)
TYPE L VENT venting listed gas
or oil burning appliances
Product reference information ...................................................... page 48
CANADA
• ULC-S636
Type BH Gas Vent Class I/II
• ULC-S609 (DSD & DSID only)
TYPE L VENT venting of flue gases with temperature not exceeding 300°C
from oil or gas burning appliances
This product must be installed in accordance with local building code requirements as well as National codes: USA - National Fuel Gas code ANSI-Z223.1
or NFPA Standard 54, or NFPA 211. In CANADA - CAN/CGA-B149.1 or CAN/
CGA-B149.2 Propane Installation Code as applicable.
2
Page 3
CLEARANCES TO COMBUSTIBLES
Table 1 shows the required MINIMUM AIRSPACE CLEARANCE TO COMBUS
TIBLES. “Combustibles” include framing lumber, drywall, plywood, paneling,
insulation, wiring and other building materials.
Minimum Clearance to Combustibles Single Wall DS
Enclosed
(4 sides)
Horiz.Vert.Horiz.Vert.
N/AN/A2”2”
N/AN/A4”4”
Diameter
3” to 12”
14” to 24”
Rated
operating
temperature
480º F
(250º C)
480º F
(250º C)
Max.
operating
temperature
550º F
(288º C)
550º F
(288º C)
Minimum Clearance to Combustibles Double Wall DSD / DSID
Enclosed
(4 sides)
Horiz.Vert.Horiz.Vert.
N/A1”1”1”
N/A1”3”1”
N/A2”2”2”
N/A2”3”2”
®
Diameter
3” to 12”
14” to 24”
3” to 12”
L-VENT
14” to
24”
L-VENT
Rated
operating
temperature
480º F
(250º C)
480º F
(250º C)
480º F
(250º C)
480º F
(250º C)
Max.
operating
temperature
550º F
(288º C)
550º F
(288º C)
550º F
(288º C)
550º F
(288º C)
Table 1 - Minimum Clearances for DuraSeal
Auxiliary parts such as combination Roof Supports, Roof Thimble, Flashings
and Wall Thimble outer shields are intended to be attached directly to the
framing or to ceilings, floors, or walls in accordance with their respective
instructions. These parts, which are installed in contact with wood or other
combustibles, are designed and tested to assure that they do not overheat
at points of contact.
Unenclosed
(2 sides Max.)
Unenclosed
(2 sides Max.)
GENERAL INSTALLATION REQUIREMENTS
-
When venting Category I, II, III, or IV appliances or TYPE L vented appliance,
DuraSeal must be used for the entire length of the system. Do not mix pipe,
fittings, or joining methods from different manufacturers. See the DuraSeal catalog for a complete list of parts and products. Every vent system
must be planned and installed for optimum performance and safety. The
venting system must be free to expand and contract and must be supported
in accordance with these instructions. (Check for unrestricted vent movement
through walls, ceilings, and roof penetrations). Refer to the gas appliance
manufacturer’s instructions to determine venting requirements and limitations
with respect to installation and use of the appliance. It is the responsibility
of the installer to contact local building and fire officials concerning
any installation restrictions and/or inspection requirements that may
apply. Permits may be required before starting an installation.
• If required by the appliance manufacturer, a Drain Tee Cap must be
located as close as possible to the appliance flue outlet. Depending on
the arrangement of the vent, more than one drain may be required.
Unless a Drain Tee Cap is supplied with the appliance, install a DuraSeal
Drain Tee Cap.
• More than one Category II, III or IV appliance may not be connected into
the same vent system, unless the appliance manufacturer specifically
approved such a system and the appliance are designed for multiple
venting. Cat. II, III or IV appliances MAY NOT be common vented with Cat.
I, natural draft appliances. This limitation can be removed if an engineering
analysis demonstrates normal and safe operation of appliances.
• DuraSeal must not come in contact with plumbing or electrical systems.
• Maintain rated clearances to combustibles over the entire length of the
vent system.
• DuraSeal shall not be routed into, through, or within any vent, such as an
existing masonry or factory-built chimney, that is connected to another appliance.
Notes:
1. Unenclosed requires at least two sides open.
2. Single Wall (DS) may be enclosed only in non-combustible enclosure.
3. Reduced clearances may be attained by using non-combustible enclosures.
4. Combustible Material is any material made of or surfaced with wood,
compressed paper, plant fibers or other materials that are capable of being
ignited or burned. Such material shall be considered combustible even
though it is flame-proofed, fire-retardant treated, or plastered. (Source:
NFPA 54/ANSI Z223.1)
5. Design any enclosure to permit inspection of the system.
6. Do not place insulation in any required clearance spaces surrounding the
vent system unless these instructions suggest otherwise and the insulation
is specified or supplied.
7. When using Viton caulking, follow the manufactures required drying times.
Material Thickness
*all seams are laser welded
DuraSeal DSDuraSeal DSD / DSID
DiameterFlueDiameterFlueCasing
3” to 9”
10” to 16”
18” to 24”
AL29-4C - .015”
316L - .015”
AL29-4C - .020”
316L - .019”
AL29-4C - .024”
316L - .024”
3” to 9”
10” to 16”
18” to 24”
AL29-4C - .015”
316L - .015”
AL29-4C - .020”
316L - .019”
AL29-4C - .024”
316L - .024”
441 stainless - .015”
441 stainless - .020”
441 stainless - .024”
PART NUMBERS
These instructions identify major model DS-DSD-DSID parts by name and part number.
Material Code Designations
BType 316 Stainless Steel
HType 430 Stainless Steel
KType 441 Stainless Steel
PType 439 Stainless Steel
UType AL29-4C Stainless Steel
Example:
DSD 36” length with inside diameter 14” made of AL29-4C inner flue and
SS441 outer casting.
DSD14L36UK
ModelDia.PartMaterial
DS 30° elbow with inside diameter 22” made of 316L.
DS22E30B
ModelDia.PartMaterial
DSD wall support for 8” diameter chimney made of stainless 439.
DSD8WSHDP
ModelDia.PartMaterial
3
Page 4
TYPICAL INSTALLATION
Cables, rods or
braces By other
500 lbs rated
Maximum distance
suspended (S), see table 6
Suspension Band (SB)
Maximum distance between
support (MHS), see table 6
Anchor Plate HD
(APHD)
Minimum slope
1/4” per foot
Minimum Clearances
See table 1
Roof Support
(RS)
30º Termination
(STA)
Opening dimension
See table 6
Wall Thimble
(WT/WTI)
Refer to condensate drain
section for proper installation
Figure 1 - Horizontal
4
Appliance
Appliance
adaptor
Page 5
TYPICAL INSTALLATION
Exit Cone (EC)
Guy wires by others
500 lbs rated
Flashing
(F)
Roof
support
(RS)
Maximum freestanding height
See table 6 (H)
Maximum distance
between guides (MVS)
See table 6
Maximum distance
between supports
See table 4 & 5
Opening
dimension
See table
7,8 & 9
Maximum distance
between elbows without
any support or guide
See table 6 (MDE)
Maximum distance
between supports
See table 4 & 5
Roof
thimble
(RT/RTI)
Guy Support
(GS)
Minimum
Clearance
See table 1
Wall support
(WS)
Wall guide
(WG)
Figure 2 - Vertical
Appliance adaptor
Maximum distance
between guides
See table 6 (MVS)
Appliance
Wall guide
(WG)
Wall support HD
(WSHD)
5
Page 6
CHIMNEY AND FITTING JOINT ASSEMBLY
All components have a male and female end, the male end has the gasket.
The installation orientation is indicated on the labeling of each chimney section
with an arrow. The arrow indicated the direction of the flow.
DuraSeal® DSDuraSeal DSD / DSID
1. Add a thin film of
silicone lubricant
on the o-ring.
2. Insert the male
end into the
female end.
ASSEMBLY JOINT DS/DSD/DSID LUBE REQUIREMENT
Inside diameterQty (oz)
3”0.1
4”0.1
5”0.1
6”0.1
7”0.1
8”0.2
9”0.2
10”0.2
12”0.3
14”0.3
16”0.3
18”0.4
20”0.4
22”0.5
24”0.5
Table 2
CHIMNEY WEIGHT
3.Close the clips to
secure the joint.
NOTE:
Clips are self-locking
Figure 3 - Joint assembly steps
To open clips, push the secondary catch while pulling up the lever
Push
Pull Up
Figure 4 - Opening clips
Chimney weight is given in pounds per foot of each diameter. It is important
to know the weight of the chimney section for chimney support or guiding.
Chimney weight (table 3) along with the maximum chimney height (table 4)
is necessary to calculate the proper anchor strength needed with supports.
CHIMNEY WEIGHT IN LB/FT
INSIDE DIAMETERDSDSDDSID
3”0.71.72.1
4”0.92.12.6
5”1.12.63.0
6”1.33.03.4
7”1.53.43.9
8”1.73.84.3
9”1.94.3N/A
10”2.14.75.5
12”2.66.27.0
14”3.67.78.2
16”4.18.79.3
18”4.69.810.3
20”5.110.811.3
22”5.711.812.4
24”6.212.8N/A
Table 3 - Chimney weight
Example: Model DuraSeal DSD 6” diameter section of 25 feet in length from
table 3, weight in lb/ft = 3. Total length 3 x 25 = 75lbs.
6
Page 7
SUPPORT METHODS AND HEIGHT
1. Several support and guiding methods are used to anchor a chimney
against upward, downward and angular placement.
2. These supports and guides prevent bending stresses on the chimney
elbows and joints.
3. Certain limitations apply for proper installation of supports and guides.
See tables 4 and 5.
4. See figure 1 and 2 for typical installations.
MAXIMUM CHIMNEY HEIGHTS AND SUPPORT METHOD FOR
Inside
Anchor
dia.
3”200200200100200100250
4”200200200100200100250
5”19519519597.519597.5225
6”1901901909519095190
7”18518518592.518592.5160
8”1801801809018090140
9”17517517587.517587.5130
10”1701701708517085115
12”160160160801608090
14”150150150751507565
16”140140140701407060
18”130130130651306555
20”120120120601206050
22”110110110551105545
24”100100100501005040
MAXIMUM CHIMNEY HEIGHTS AND SUPPORT METHOD FOR
Inside
Anchor
dia.
3”1001001005010050115
4”100100100 50100 50115
5”97.597.597.5 48.7597.5 48.7595
6”959595 47.595 47.580
7”92.592.592.5 46.2592.5 46.2570
8”909090 4590 4565
9”87.587.587.5 43.7587.5 43.7555
10”858585 42.585 42.550
12”808080 4080 4040
14”757575 37.575 37.530
16”707070 3570 3527
18”656565 32.565 32.525
20”606060 3060 3022
22”555555 27.555 27.521
24”505050 2550 2520
Plate
(AP)
Plate
(AP)
Anchor
Plate
HD
(APHD)
Anchor
Plate
HD
(APHD)
Anchor
Plate
Length
(APL)
Anchor
Plate
Length
(APL)
Wall
Support
(WS)
Wall
Support
(WS)
Wall
Support
HD
(WSHD)
Wall
Support
HD
(WSHD)
MODEL DS
Roof
support
(RS)
MODEL DSD
Roof
support
(RS)
Guy
support
(GS)
Guy
support
(GS)
Table 4 - Dimensions are in feet
MAXIMUM CHIMNEY HEIGHTS AND SUPPORT METHOD FOR
Inside
Anchor
dia.
3”95959547.59547.580
4”95959547.59547.580
5”92.592.592.546.2592.546.2570
6”90909045904565
7”87.587.587.543.7587.543.7555
8”85858542.58542.550
9”N/AN/AN/AN/AN/AN/AN/A
10”80858542.58542.540
12”75757537.57537.530
14”70707035703527
16”65656532.56532.525
18”60606030603022
20”55555527.55527.521
22”50505025502520
24”N/AN/AN/AN/AN/AN/AN/A
Plate
(AP)
Anchor
Plate
HD
(APHD)
Anchor
Plate
Length
(APL)
Wall
Support
(WS)
Wall
Support
HD
(WSHD)
MODEL DSID
Roof
support
support
(RS)
Table 5 - Dimensions are in feet
Guy
(GS)
7
Page 8
SUPPORT AND GUIDE SPACING FOR
Inside
diameter
3”10812121050
4”108121210100
5”108121210100
6”108121210100
7”108121210100
8”108121210100
9”108121210100
10”108121210100
12”108121210100
14”108121210100
16”108121210100
18”108121210100
20”108121210100
22”108121210100
24”108121210100
SUPPORT AND GUIDE SPACING FOR
Inside
diameter
3”10812121050
4”10812121050
5”10812121050
6”10812121050
7”10812121050
8”10812121050
9”10812121050
10”10812121050
12”10812121050
14”10812121050
16”10812121050
18”10812121050
20”10812121050
22”10812121050
24”10812121050
MVS
InteriorExterior
MVS
InteriorExterior
MODEL DS
MHSMDEHS
MODEL DSD & DSID
MHSMDEHS
Table 6 - Dimensions are in feet
MVS : Maximum Vertical Spacing between Guides/Supports
MHS: Maximum Horizontal Spacing between Guides/Supports
MDE: Maximum Distance between Elbows
H: Maximum Freestanding Height above the Roof
S: Maximum Suspended Length
*Important Notes:
1. For Anchor Plate (AP) / Anchor Plate Heavy Duty (APHD) / Wall Support
Heavy Duty (WSHD), the support must be installed below a bead. See
figure 5.
2. For Wall Support (WS) / Roof Support (RS) , the support can be installed
anywhere on the part.
3.
For Anchor plate length, the support is already integrated to a length. Directly
attached to the building structure or supported by non combustible structural
elements (not included). No other installation is required than the standard
installation for a regular length.
Anchor plate,
Bead
A. Pass the female end through the
B. Install the two parts plate below
Figure 5 - Position of support
HORIZONTAL INSTALLATION REQUIREMENTS
• When venting through a sidewall, terminate the system not less than 12” (.3m)
• Terminate the system at least 7’ (2.1m) above a public walkway or driveway,
• The total horizontal vent length from the appliance flue collar to the outside
Anchor plate HD or
Wall support HD
hole of the one part plate.
a bead and bolt it to the one part
plate.
Bead
One part plate
Two parts
plate
Bolts and
nuts
above the ground and above the snow line in geographical areas where snow
accumulates. The termination area must be kept clear of snow and ice at all
times.
no less than 6’ (1.8m) from the combustion air intake of any appliance or 3’
(.9m) from any other building opening, gas utility meter, service regulator or
the like. Less distance is permitted if specified in the appliance’s installation
instructions. It also shall terminate at least 3’ (.9M) above any forced air inlet
within 10’ (3.1m) and shall terminate at least 4’ (1.2m) below, 4’ horizontally
from, or 1’ (.3m) above any door, window, or gravity air inlet into any building
as provided in the National Fuel Gas Code ANSI Z223.1 and NFPA 54. See
figure 6. Proper judgment may require greater distances depending on the
side of the equipment installed or to allow for snow drifting or falling from
falling from overhead roofs or trees. The termination should be far enough
away from trees, shrubs, or decorative items to prevent damage.
termination shall be in accordance with the appliance manufacturer’s instructions.
8
Page 9
MAINTAIN PROPER SLOPE
VERTICAL INSTALLATION REQUIREMENTS
• Install with a continuous 1/4” per foot (minimum) slope, as is required by the
National Fuel Gas Code for all gas-fired appliances.
• Vent systems for condensing appliances must have a continuous 1/4” per foot
(minimum) slope toward the appliance or a condensate drain. Always check
the appliance manufacturer’s instructions for proper drain requirements.
•
DuraSeal
degree slope, we recommend that you use these to generate your slope.
• Some appliances require the venting system to be sloped toward the horizontal
termination.
• Remember, if you raise the appliance or lower the ceiling you must adjust
the slope of the vent to maintain the 1/4” per foot minimum.
®
offers a range of tees and elbows that are built incorporating a 2
1 ft. above doors and windows
4 ft. horizontally from
door and windows
4 ft below any
window or fresh
air inlet
1 ft. above ground
or snow line
7 ft above
public
walkways
and drives
Sidewalk
Figure 6 - Horizontal termination requirements
1. The vent system must terminate at least 3 feet above the roof line and
at least 2 feet higher than any portion of the building within 10 feet.
See figure 7. This limitation can be removed if an engineering analysis
demonstrates normal and safe operation of appliance.
2. When terminated at a height of more than 10 feet, the stack must be
supported by a Guy Section.
3. The vent system must terminate with one of the
DuraSeal
®
terminations.
Except;
a) Category I appliances (natural draft) must use a Rain Cap. It is optional
on Category II. This limitation can be removed if an engineering analysis
demonstrates normal and safe operation of appliance.
b) Vent systems without provisions for draining rain water must use a Rain
Cap.
c) Terminations or approved mechanical vent devices specified or provided
by the appliance manufacturer are permitted.
4. The total continuous distance of the vent system from the appliance flue
collar to the termination shall not exceed that specified in the appliance
manufacturer’s installation instructions. When venting natural draft appliances the termination must be at least 5 feet above the topmost draft
hood. Otherwise a listed mechanical draft inducing device is required.
This limitation can be removed if an engineering analysis demonstrates
normal and safe operation of appliance.
5. In general, systems installed in cold climates perform best, and condensation is reduced, when the system is fully enclosed by some part of the
building structure or by using insulated SSID venting system.
6. In cold climates do not install a condensate drain on the exterior of the
building. Doing so may result in dangerous icy conditions on surfaces near
the drain and may cause damage to the vent system and/or the building
exterior. Security Chimneys will NOT be held liable for any personal injury
or property damage due to any formation of ice.
7. Vertical supports are required after every transition to vertical. Vertical
supports are also required after every offset elbow.
8. Unless DuraSeal is installed in a fire rated shaft, a roof thimble and support
is required when penetration fire rated floors, walls or ceilings.
10’
2’
2 ft. above structures within 10 ft.
Figure 7 - Vertical installation requirements
9
Page 10
WALL PENETRATION
ROOF / FLOOR PENETRATION
1. Prior to installation, determine proper location of wall thimble (WT) or wall thimble
insulated (WTI) so that a minimum slope of 1/4” (6mm) per foot is maintained in
the horizontal section of vent to ensure proper flow of condensation.
2. Prepare the wall by cutting a square opening. See table 6 for opening dimension.
3. Install the wall thimble by inserting the larger of the two parts on the appliance
(interior side). See figure 8.
4. Next, apply a bead of sealant around the edges of the exterior (smaller of the
two parts) wall thimble component. Then install this part of the wall thimble by
inserting the smaller collar into the other component from the previous step.
NOTE: The two horizontal cylinders of the thimble must engage a
minimum of two inches.
5. Fasten both sides of the wall thimble using screws or nails.
6. Once the thimble is installed, DuraSeal
®
vent pipe can be inserted into
the thimble.
7. Close the gap between the thimble and the vent by installing the two half
plate and fasten it using screws or nails.
8. Install horizontal termination to complete the assembly.
9. Once assembly is completed, apply a bead of high-temp sealant around
the pipe and the exterior two half plates of the thimble to protect against
weather.
10. The air gap is filled with insulation when using the insulated wall thimble
(WTI).
1. A roof thimble (RT) or roof thimble insulated (RTI) for cold climate must be installed
every time the vent system passes through a floor or roof.
2. Prepare the roof / floor by cutting a square opening. See table 6.
3. Install the roof thimble. You may cut the radiation sleeve if it is too long. See
figure 9.
4. For roof installation, install a flashing.
Flashing
Roof support
Air gap
or insulated
Roof thimble
Opening dimension
See table 6
Figure 9 - Roof penetration
2” Minimum overlap
Opening dimension
See table 6
Air gap or
insulated
Figure 8 - Wall penetration
Add sealant
Two half plate
Wall Thimble
(WT/WTI)
Termination
CONDENSATE DRAINS
When an internal condensate drain is NOT part of the appliance:
1. A Drain length (DL) or a Tee with a drain tee cap (DTC) is strongly recommended.
Install this drain as close as possible to the appliance flue collar.
2. A condensate drain is required for every 30 feet of horizontal vent and at the bottom
of a vertical stack.
3. Use the Drain length for a straight horizontal run. Rotate the fitting so that the
drain tube is as vertical as possible.
4. Use a Tee at a transition from horizontal to vertical, and attach the Drain Tee Cap
to the appropriate branch of the tee.
5. A condensate drain tube kit is available to direct the condensate to an appropriate
location. A trap loop must be formed into the drain hose and must be a diameter
that is at least four times the appliance’s rated stack pressure in inches of water
column or minimum 3 inches. Secure the loop with a cable tie.
6. Flue gas condensate can have a low (3 to 5) PH level, follow all local and national
codes and regulations for the draining of acidic condensate.
7. In cold climate, do not install a condensate drain on the exterior of the building.
Doing so may result in dangerous icy conditions on surfaces near the drain and
may cause damage to the vent system and the building exterior. DuraVent will
NOT be held liable for any injury or property damage due to formation of ice.
10
Page 11
OPENING DIMENSIONS FOR WALL/ROOF PENETRATION
FOR MODEL DS
Inside
diameter
3”8x89x97x711x11
4”9x910x108x812x12
5”10x1011x119x913x13
6”11x1112x1210x1014x14
7”12x1213x1311x1115x15
8”13x1314x1412x1216x16
9”14x1415x1513x1317x17
10”15x1516x1614x1418x18
12”17x1718x1816x1620x20
14”22x2222x2222x2222x22
16”24x2424x2424x2424x24
18”26x2626x2626x2626x26
20”28x2828x2828x2828x28
22”30x3030x3030x3030x30
24”32x3232x3232x3232x32
Table 7 - Dimensions are in inches
Wall
Thimble
(WT)
Wall
Thimble
Insulated
(WTI)
Roof
Thimble
(RT)
Roof
Thimble
Insulated
(RTI)
OPENING DIMENSIONS FOR WALL/ROOF PENETRATION
FOR MODEL DSID
Inside
diameter
3”10x1011x117x711x11
4”13x1314x1410x1014x14
5”14x1415x1511x1115x15
6”15x1516x1612x1216x16
7”16x1617x1713x1317x17
8”17x1718x1814x1418x18
9”N/AN/AN/AN/A
10”19x1920x2016x1620x20
12”22x2222x2218x1822x22
14”24x2424x2420x2024x24
16”26x2626x2622x2226x26
18”28x2828x2824x2428x28
20”30x3030x3026x2630x30
22”32x3232x3228x2832x32
24”N/AN/AN/AN/A
Table 9 - Dimensions are in inches
Wall
Thimble
(WT)
Wall
Thimble
Insulated
(WTI)
Roof
Thimble
(RT)
Roof
Thimble
Insulated
(RTI)
OPENING DIMENSIONS FOR WALL/ROOF PENETRATION
FOR MODEL DSD
Inside
diameter
3”12x1213x139x913x13
4”11x1112x128x812x12
5”12x1213x139x913x13
6”13x1314x1410x1014x14
7”14x1415x1511x1115x15
8”15x1516x1612x1216x16
9”16x1617x1713x1317x17
10”17x1718x1814x1418x18
12”19x1920x2016x1620x20
14”22x2222x2218x1822x22
16”24x2424x2420x2024x24
18”26x2626x2622x2226x26
20”28x2828x2824x2428x28
22”30x3030x3026x2630x30
24”32x3232x3228x2832x32
Table 8 - Dimensions are in inches
Wall
Thimble
(WT)
Wall
Thimble
Insulated
(WTI)
Roof
Thimble
(RT)
Roof
Thimble
Insulated
(RTI)
11
Page 12
INSTALLING DURASEAL® AS A LINER IN A MASONRY CHIMNEY OR
AS A LINER IN AN EXISTING VENT
* Stainless Steel Wire Rope (by others) is to be used to hang the vent
system from the top of the masonry chimney or from the top of the
existing vent.
- The stainless wire rope is attached to the Guy Support Band and is
secured with cable clamps (by others).
- The Stainless Steel Wire Rope is secured in a similar manner to the
top platform of the masonry chimney or existing vent.
- Use the appropriate size of Stainless Steel Wire Rope to accommodate
the required total loads of the vent system.
Note: When installed as a liner in a masonry chimney or to reline an existing vent no other appliance
can be vented into the same chimney or vent.
Exit cone (EC)
Storm Collar (SC)
Flat Flashing (F)
1” Minimum
It may be necessary to fabricate a platform (at top of chimney / vent
- by others).
Consult DuraVent for guidelines.
DO NOT USE GALVANIZED WIRE ROPE.
Masonry chimney
Combustible wall
Stainless steel
wire rope *
(by other)
Centering band
(CB)
Guy support (GS)
Elbow or tee
Maximum distance
between guides
See table 6 (MVS)
Maximum distance
between supports
See table 4 & 5
Maximum distance
between guides
See table 6 (MVS)
12
Figure 10 - Installing DuraSeal as a liner
Page 13
ADJUSTABLE LENGTH
For installations that requires non-standard vent lengths,
(AL) should be used.
The part consists of an inner conduit that slips into the downstream part and over the
upstream part, a collar holds the conduit in place and an outer shell (for double wall
only). See figure 11 for installation steps.
Note: The inner conduit may be cut to desired length to limit interference with downstream part.
DuraSeal
®
Adjustable Length
DuraSeal DS
1. Keep a play about
1/8” to 1/4” to
allow thermal
expansion
2. Apply a 1/8” to 1/4”
bead (may vary) of
Viton caulking to fill
the gap between the
adjustable length
inner wall and
the female end of
the standard part.
Please allow 24-36
hours for Viton to
cure.”
3. Slide the collar
down over the
female end of the
downstream part
and tighten the
collar
ADJUSTABLE LENGTH DS/DSD CAULKING REQUIREMENT
Inside diameterQty (oz)
3”0.2
4”0.3
5”0.4
6”0.5
7”0.6
8”0.7
9”0.8
10”0.9
12”1.0
14”1.2
16”1.4
18”1.5
20”1.7
22”1.9
24”2.1
Table 10
DuraSeal DSD
1. Keep a play about
1/8” to 1/4” to
allow thermal
expansion
2. Apply a 1/8” to 1/4”
bead (may vary) of
Viton caulking to fill
the gap between the
adjustable length
inner wall and
the female end of
the standard part.
Please allow 24-36
hours for Viton to
cure.
3. Slide the collar
down over the
female end of the
downstream part
and tighten the
clamp
4. Install the outer shell over end of
downstream part and under the
end of upstream part and tighten
the clamps. Need to cut outer
shell to correct length.
Figure 11 - Adjustable length installation steps
13
Page 14
DURASEAL FLEX
*IMPORTANT NOTE
When installing DuraSeal Flex, the direction of exhaust flow is always from the ap-
pliance. There is an arrow printed on each section of liner and component that will
point in the direction of the exhaust gas. If the inner liner is installed correctly the
proper direction can be determined by running your fingernails up the inside wall of
the liner. If the direction is correct, your nails will catch at the seams of the inner
wall. If it is incorrect, your nails will slide smoothly across the inner surface.
Attaching adapters to DURASEAL FLEX liner
1- The adapter without the latches is the Female Flex Adapter and designed for the
top of the flex liner. The Adapter with the latches and the black Viton O-ring is
the Male Flex Adapter and is designed for the bottom of the flex liner. If cutting
the liner on the field is required, make sure the cut is square.
2- Make a mark on both ends of liner at 1 5/8” from each end. (Figure 12a) That
mark will act as a reference point when the adapters are fully seated onto the flex
liner. (Figure 12b)
3- To be sure everything is right before putting the sealant between both tubes, do a
dry fit test by pushing the liner into the adapter until it reach the bottom between
the inner tube and the outer tube, then remove it. (Figure 13)
4- Add the sealant S-650 in the channel of the Male Flex Adapter. Put enough sealant
so the channel gap is evenly covered all around. (Figure 14)
Small cut / catch
1 5/8 min
1 7/8 MAX
Figure 12b - Flex Adapter small cut / catch
5- Push the adapter on the liner (the inner tube fits inside the liner and the outer tube
fits outside the liner) all the way in. (Figure 15)
6- Push the little natches. (Figure 16)
7- Repeat steps 3 through 6 for the other end with the female flex adapter or the flex
to flex adapter.
8- Before installation, cure for a minimum of 24 hours or follow the cure time called
out by the silicone manufacturer.
1 5/8”
Figure 13 - Flex Adapter dry fit test
apply sealant
1 5/8”
Figure 12a - DuraSeal Flex liner
14
Figure 14 - Flex Adapter apply sealant
Page 15
Figure 15 - Flex Adapter, seating flex
Small cut / catch
Push natches
Guy support (GS)
Figure 16 - Flex Adapter push natch to lock
BASIC DURASEAL FLEX LINER INSTALLATION
1- Determine the required location and opening in the masonry chimney. For a
basic DuraSeal Flex installation the opening must be large enough for the mortar
sleeve and Male Flex Adapter and the DuraSeal Flex to easily pass through. If a
Tee application is necessary, a larger hole may be required.
2- Make sure the DuraSeal Flex is supported at the bottom of the chimney. Refer to
Figure 10 for guiding and support installation in the masonry chimney.
3- The DuraSeal Flex liner must be installed from the top of the masonry chimney.
To prevent damage, one person should feed the liner through the chimney and
another person should pull the liner from the bottom. To ease the installation, you
can attach a rope to the DuraSeal Flex liner above the Male Flex Adapter. Doing
this will reduce the chance of breaking the seal between the DuraSeal Flex and
the Male Flex Adapter.
4- The DuraSeal Flex must stay within the masonry chimney; however the Elbow or
other DuraSeal components will extend beyond the masonry chimney. (Figure
16)
5- It is strongly recommended to use a drain between the Male Flex Adapter and the
appliance (refer to Condensate Drains section).
Figure 17 - Flex Adapter Elbow in masonry
MAINTENANCE INSTRUCTIONS
As with all vents, the DuraSeal vent system should be inspected at least annually for
the presence of deposits or debris and any accumulation should be removed. The vent
system should also be inspected at regular periods for signs of leakage of condensate
or combustion products at any joints.
If the vent system incorporates a drain hose from either a Drain length or a Drain tee
cap, the hose must be inspected periodically to ensure that water is in the trap loop.
If a proper trap loop is not maintained, exhaust from the connected appliances may
accumulate in the building area.
15
Page 16
DS, DSD / DSID DURASEAL® CHIMNEY LABELS
The labels supplied for product identification are shown here and indicates the flow of the flue gases in the venting system.
Ø (in.) ØB Available (in.) Height (in.)Product Code
3 to 9Ø+111-7/8DSØTIN(ØB)
3 to 22Ø+212-7/8DSØTIN(ØB)
3 to 9Ø+313-7/8DSØTIN(ØB)
3 to 20Ø+414-7/8DSØTIN(ØB)
3 to 7Ø+515-7/8DSØTIN(ØB)
3 to 18Ø+616-7/8DSØTIN(ØB)
Figure 122
DS Tapered Increaser
K Factor
0.05
0.10
0.15
0.20
0.25
0.30
39
Page 40
Ø B
Ø
DS Step Increaser
Ø (in.) ØB Available (in.) Height (in.)Product CodeK Factor
3 to 225 to 2410DSØSIN(ØB)KØ = (1-B
Figure 123
Ø B
KØB = KØ/B
Offset
Height
Height
2)2
4
Ø B
Height
Ø
DS Tapered Reducer
Ø (in.)ØB Available (in.) Height (in.)Product CodeK Factor
5 to 10Ø-111-7/8DSØTRD(ØB)0.07
6 to 24Ø-212-7/8DSØTRD(ØB)0.09
6 to 12Ø-313-7/8DSØTRD(ØB)0.11
8 to 24Ø-414-7/8DSØTRD(ØB)0.13
9 to 24Ø-515-7/8DSØTRD(ØB)0.15
10 to 24Ø-616-7/8DSØTRD(ØB)0.17
Figure 126
Ø B
Height
Ø
DS Eccentric Tapered Increaser
Ø
ØB Available
(in.)
3 to 9Ø+112-1/41/2DSØETIN(ØB)0.05
3 to 22Ø+213-1/41DSØETIN(ØB)0.10
3 to 9Ø+314-1/41-1/2DSØETIN(ØB)0.15
3 to 20Ø+415-1/42DSØETIN(ØB)0.20
3 to 7Ø+516-1/42-1/2DSØETIN(ØB)0.25
3 to 18Ø+617-1/43DSØETIN(ØB)0.30
(in.)
Height
(in.)
Offset
(in.)
Product CodeK Factor
Figure 124
Ø B
Offset
Height
B= Ø/ØB
DS Eccentric Step Increaser
Ø
ØB Available
(in.)
3 to 225 to 2410(ØB-ØA)/2DSØESIN(ØB)KØ = (1-B
(in.)
Height
(in.)
Offset
(in.)
Ø
Product CodeK Factor
KØB = KØ/B
Figure 125
40
Ø
DS Step Reducer
Ø (in.) ØB Available (in.) Height (in.) Product CodeK Factor
5 to 244 to 2210DSØSRD(ØB)KØ = (1-B
KØB = KØ/B
2)2
4
Figure 127
Ø B
Offset
Height
Ø
DS Eccentric Tapered Reducer
Ø (in.) ØB Available
(in.)
5 to 10Ø+112-1/41/2DSØETRD(ØB)0.07
6 to 24Ø+213-1/41DSØETRD(ØB)0.09
6 to 12Ø+314-1/41-1/2DSØETRD(ØB)0.11
8 to 24Ø+415-1/42DSØETRD(ØB)0.13
9 to 24Ø+516-1/42-1/2DSØETRD(ØB)0.15
2)2
4
10 to 24Ø+617-1/43DSØETRD(ØB)0.17
Height
(in.)
Offset (in.)Product CodeK Factor
Figure 128
Page 41
Ø B
Offset
Height
Ø
B = Ø/ØB
DS Eccentric Step Reducer
Ø (in.) ØB Available
(in.)
5 to 104 to 2210(ØA-ØB0/2 DSØESRD(ØB) KØ = (1-B
Height
(in.)
Offset (in.) Product CodeK Factor
KØB = KØ/B
Figure 129
4 to 12 : Ø + 10
4 to 24 : Ø + 11
2)2
10
Ø + Clearance + 3
DS Roof Thimble
Ø (in.)Height (in.)Product Code
3 to 2410DSØRT
Figure 132
10
4
Ø + Clearance + 3
DS Roof Thimble Insulated
Ø (in.)Height (in.)Product Code
3 to 2410DSØRTI
Figure 133
Width
DS Wall Thimble
Ø (in.)Height (in.)Product Code
3 to 249 to 17DSØWT
Figure 130
Width
DS Wall Thimble Insulated
Ø (in.)Height (in.)Product Code
3 to 249 to 17DSØWTI
Figure 131
4 to 12 : Ø + 10
4 to 24 : Ø + 11
Ø
DS Suspension Band
Ø (in.)Product Code
3 to 24DSØSB
Figure 134
1-1/2”
Ø
DS Cradle Support
Ø (in.)Product Code
3 to 24DSØCS
Figure 135
41
Page 42
A
Ø
Ø < = 14
Ø > = 12
B
A
22 to 32
DS Wall Support
Ø (in.)Height (in.)Product Code
3 to 122 to 5DSØWS
14 to 24 4 to 7DSØWS
Figure 136
A
DS Roof Support
Ø (in.)A (in.)B (in.)Product Code
3 to 126-1/27-5/8DSØRS
14 to 2422 to 321-1/2DSØRS
Figure 138
A
Ø
DS Anchor Plate
B
Ø
C
Ø (in.)A (in.)Product Code
3 to 12Ø+7DSØAP
14 to 24Ø+11DSØAP
Figure 139
A
DS Wall Support HD
Ø (in.)A (in.)B (in.)C (in.)Product Code
32 to 778DS3WSHD
42 to 778DS4WSHD
52 to 799DS5WSHD
62 to 71210DS6WSHD
72 to 71211DS7WSHD
82 to 71212DS8WSHD
92 to 71413DS9WSHD
102 to 71414DS10WSHD
122 to 71616DS12WSHD
144 to 92220DS14WSHD
164 to 92222DS16WSHD
184 to 92624DS18WSHD
204 to 92626DS20WSHD
224 to 93028DS22WSHD
244 to 93030DS24WSHD
Figure 137
42
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Ø
2-1/2
DS Anchor Plate HD
Ø (in.)A (in.)Product Code
3 to 12Ø+7DSØAPHD
14 to 24Ø+11DSØAPHD
Figure 140
Page 43
A
A
9-9/32
DS Anchor Plate Length (APL)
Ø (in.)A (in.)Product Code
3 to 12
14 to 24
Ø
+ 7DSØAPL
Ø
+ 11DS
Figure 141
DS Roof Brace
Ø (in.)Product Code
3 to 24DSØRB
Figure 142
Ø
Ø
DS Wall Guide
Ø (in.)A (in.)Product Code
3 to 242 to 5-1/2DSØWG
ØAPL
14 to 244 to 7-1/2DSØWG
Figure 145
Ø
3
Ø (in.)Product Code
3 to 24DSØGS
DS Guy Support
3/4
3
Ø
Figure 146
Figure 143
Figure 144
Ø
DS Guy Wire Band
Ø (in.)Product Code
3 to 24DSØGWB
6
Ø
DS Centering Band
Ø (in.)Product Code
3 to 24DSØCB
Ø
DS Double Male Adaptor
Ø (in.)Effective Length (in.)Product Code
3 to 243-7/8DSØDMA
Figure 147
1/2
Ø
DS Male Flange Adaptor
Ø (in.)Effective Length (in.)Product Code
3 to 244-7/8DSØMFA
Figure 148
Effective
length
Effective
length
43
Page 44
Ø
DS Female Flange Adaptor
Ø (in.)Effective Length (in.)Product Code
3 to 244-1/4DSØFFA
Figure 149
7-7/8
DS to DSD Adaptor
Ø (in.)Effective Length (in.)Product Code
3 to 247-7/8DSØDSDA
Figure 150
Effective
length
1/2
DuraSeal-Flex Female Adapter
Ø (in.)Effective Length (in.)Product Code
3 to 129-11/32DSØAFF
Figure 152
Ø
DuraSeal-Flex Male Adapter
Ø (in.)Effective Length (in.)Product Code
3 to 127DSØAMF
DuraSeal-Flex
Ø (in.)Flex Length (ft.)Product Code
20DSØFLX-20
3 to 9
4200DS4FLX-200
5125DS5FLX-125
6 & 7100DSØFLX-100
850DS8FLX-50
3 to 12CUSTOMDSØFLX-XX
25DSØFLX-25
30DSØFLX-30
35DSØFLX-35
Figure 151
44
Figure 153
DuraSeal-Flex to DuraSeal-Flex
Ø (in.)Effective Length (in.)Product Code
3 to 12__DSØAF
Figure 154
Ø
7
DS Storm Collar
Ø (in.)Effective Length (in.)Product Code
3 to 246-1/4DSØSC
Figure 155
Page 45
Ø
12
Figure 156
A
DS Flat Flashing
Ø (in.)A (in.)Product Code
316DS3FH
416DS4FH
516DS5FH
616DS6FH
718DS7FH
826DS8FH
926DS9FH
1028DS10FH
1230DS12FH
1431DS14FH
1634DS16FH
1836DS18FH
2038DS20FH
2240DS22FH
2442DS24FH
Ø
Ø
DS Rain Cap
Ø (in.)Product CodeProduct Code with Bird ScreenK Factor
3 to 24DS3RCDSØRCB.50
Figure 158
3-1/2
Ø
DS Screened Termination
Ø (in.)Product CodeK Factor
3 to 24DSØST.14
Figure 159
Ø + 4
12-1/2
A
Adjustable from 5° to 30°
Roof pitch 1/12 to 7/12
DS Adjustable Flashing
Ø (in.)A (in.)Height (in.)Product Code
33012-1/2DS3FAH
43012-1/2DS4FAH
53012-1/2DS5FAH
63212-1/2DS6FAH
73212-1/2DS7FAH
83412-1/2DS8FAH
935-3/812-1/2DS9FAH
1036-1/212-1/2DS10FAH
1238-1/212-1/2DS12FAH
144112-1/2DS14FAH
164312-1/2DS16FAH
184512-1/2DS18FAH
2047-1/412-1/2DS20FAH
2219-1/212-1/2DS22FAH
2451-1/212-1/2DS24FAH
Figure 157
Ø
30°
DS 30° Screen Termination
Ø (in.)Product CodeK Factor
3 to 24DSØSTA.70
Figure 160
90% Ø
15
Ø
DS Exit Cone
Ø (in.)Product CodeK Factor
3 to 24DSØEC.60
Figure 161
45
Page 46
Ø + 6
Figure 162
Ø
Ø
DS Termination Tee
Ø (in.)Product CodeK Factor
3 to 24DSØTT.35
Ø + 3-1/2
Ø
Ø + 4-1/2
DS Mitre Cut
Ø (in.)Product CodeK Factor
3 to 24DSØMC.14
Figure 163
Ø
DS OEM Termination
Ø (in.)Product CodeK Factor
3 to 24DSØOEMTAU0
Figure 164
46
20
23-1/2
Page 47
DuraVent Limited Lifetime Warranty
M&G DuraVent, Inc. (“DuraVent”) provides this limited lifetime
warranty for all of its products with the exception of Ventinox®
(lifetime), and PolyPro® (ten years). Subject to the limitations
set forth below, DuraVent warrants that its products will be free
from defects in material or manufacturing, if properly installed,
maintained and used. DuraVent products are fully warranted
if installed only by a professional installer. This Warranty is
transferable from the original homeowner to the buyer of the home.
This warranty does not cover normal wear and tear, smoke damage
or damage caused by chimney fires, acts of God, or any product
that was: (1) purchased other than from an authorized DuraVent
dealer, retailer or distributor; (2) modified or altered; (3) improperly
serviced, inspected or cleaned; or (4) subject to negligence or any
use not in accordance with the installation instructions included with
the product as determined by DuraVent. Installation instructions are
available online at www.duravent.com under Support/Literature
and through our Customer Service Department 800-835-4429 or
customerservice@duravent.com. This limited lifetime warranty
applies only to parts manufactured by DuraVent.
DuraVent provides the following warranties for its products: One
Hundred Percent (100%) MSRP 15 years from the date of purchase,
and Fifty Percent (50%) thereafter, except for the following
limitations on: all Termination Caps and DuraBlack® are warranted
at One Hundred Percent (100%) for five years.
All warranty obligations of DuraVent shall be limited to repair or
replacement of the defective product pursuant to the terms and
conditions applicable to each product line. These remedies shall
constitute DuraVent’s sole obligation and sole remedy under this
warranty. This warranty provides no cash surrender value. The
terms and conditions of this warranty may not be modified, altered
or waived by any action, inaction or representation, whether oral or
in writing, except upon the express, written authority of an executive
officer of DuraVent.
DuraVent must be notified and given the opportunity to inspect
defective product prior to replacement under the terms of this
limited lifetime warranty. All warranty claims must be submitted
with proof of purchase. Labor and installation costs are not covered
under this warranty. To obtain warranty service contact: DuraVent
Warranty Service, 877 Cotting Ct., Vacaville CA 95688, or call 800835-4429.
WHERE LAWFUL, DURAVENT DISCLAIMS ALL OTHER
WARRANTIES, INCLUDING BUT NOT LIMITED TO IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE. IN NO EVENT WILL DURAVENT BE
LIABLE FOR INCIDENTAL, CONSEQUENTIAL, PUNITIVE OR
SPECIAL DAMAGES OR DIRECT OR INDIRECT LOSS OF ANY KIND,
INCLUDING BUT NOT LIMITED TO PROPERTY DAMAGE AND
PERSONAL INJURY. DURAVENT’S ENTIRE LIABILITY IS LIMITED
TO THE PURCHASE PRICE OF THIS PRODUCT. SOME STATES DO
NOT ALLOW LIMITATIONS ON IMPLIED WARRANTIES, OR THE
EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL
DAMAGES, SO THE ABOVE LIMITATIONS AND EXCLUSIONS
MAY NOT APPLY TO YOU. THIS LIMITED WARRANTY GIVES YOU
SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER
RIGHTS THAT VARY FROM STATE TO STATE.
For the most up-to-date installation instructions, see
www. duravent.com
REV 2.27.2013
Manufactured in Vacaville CA and Albany NY
Corn, bio-fuels, driftwood or other wood containing salt,
preservative-treated lumber, plastic and household trash or garbage,
or wood pellets containing such materials must not be burned in the
appliance or fireplace. In case of a chimney fire, the chimney must
be inspected and approved by a certified Chimney Sweep before
reuse. After each annual inspection, maintenance, and cleaning,
the certified Chimney Sweep must fill out and date the appropriate
section of the warranty card provided with the chimney liner.
LIMITATIONS ON INTERNET SALES: Notwithstanding any other
terms or conditions of this Limited Lifetime Warranty, DuraVent
provides no warranty for the following specific products if such
products are not installed by a qualified professional installer:
DuraTech®, DuraTech® DTC, DuraPlus HTC®, DuraChimney® II,
PelletVent Pro®, DirectVent Pro®, FasNSeal®, FasNSeal® W2,
FasNSeal® Flex, and PolyPro®, and DuraVent’s relining products
including DuraLiner®, DuraFlex® (SW, Pro, 316, 304), and
Ventinox®. For purposes of this warranty, a trained professional
installer is defined as one of the following: licensed contractors
with prior chimney installation experience, CSIA Certified Chimney
Sweeps, NFI Certified Specialists, or WETT Certified Professionals.
47
Page 48
WARRANTY
This product has a 15 year limited warranty. Please read the warranty to be
familiar with its coverage.
Normally, all parts should be ordered through your DuraVent distributor or
dealer. Parts will be shipped at prevailing prices at time of order.
When ordering repair parts, always give the following information:
Retain this manual. File it with your other documents for future reference.
PRODUCT REFERENCE INFORMATION
Please contact DuraVent for the phone number of your nearest DuraVent dealer
who will answer your questions or address your concerns.
1. The model number of the vent system.
2. The part number.
3. The description of the part.
4. The quantity required.
5. The installation date of the chimney system.
If you encounter any problems or have any questions concerning the installation
or application of this system, please contact your dealer.
48
877 Cotting Court • Vacaville, CA • 95688
800-835-4429; www.DuraVent.com
DuraVent reserves the right to make changes at any time, without notice, in design, materials, specifications, prices.
Consult your local distributor for chimney system code information.