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PART NUMBERS
These instructions identify major model DS-DSD-DSID parts by name and
part number.
Material Code Designations
B
Type 316 Stainless Steel
H
Type 430 Stainless Steel
K
Type 441 Stainless Steel
P
Type 439 Stainless Steel
U
Type AL29-4C Stainless Steel
Example:
DSD 36" length with inside diameter 14" made of AL29-4C inner flue
and SS441 outer casting.
DSD
14
L36
Model
Dia.
Part
DS 30° elbow with inside diameter 22" made of 316L.
DS
22
E30
Model
Dia.
Part
DSD wall support for 8" diameter chimney made of stainless 439.
DSD
8
WSHD
Model
Dia.
Part
Use only factory-supplied components. Failure to do so will void
the certification and the warranty of the chimney system.
EFFECTIVE LENGTH
DS-DSD-DSID (3"-24")
When assembling two parts together, the joint will overlap 2-3/8". Effec-
tive length is nominal length minus 2-3/8".
Example:
Effective Length
»
L36
33-5/8"
L24
»
21-5/8"
L18
»
15-5/8"
»
L12
9-5/8"
L9
»
6-5/8"
DSLS-DSLD (26"-36")
The effective length is the length of the part when it is
assembled.
Example:
Effective Length
L36
»
35-9/16"
»
L24
24-1/16"
L18
»
17-9/16"
L12
»
11-9/16"
UK
Material
B
Material
P
Material
CLEARANCES TO COMBUSTIBLES
Table 1 shows the required MINIMUM AIRSPACE CLEARANCE TO COMBUSTIBLES.
"Combustibles" include framing lumber, drywall, plywood, paneling, insulation,
wiring, and other building materials.
Minimum Clearance to Combustibles Single Wall DS - DSLS
Rated
Diameter
Operating
Operating
Temp
480°F
3" to 12"
(250°C)
480°F
14" to 24"
(250°C)
480°F
26" to 36"
(250°C)
Minimum Clearance to Combustible Double Wall DSD - DSID - DSLD
Rated
Diameter
Operating
Operating
Temp
480°F
3" to 12"
(250°C)
480°F
14" to 24"
(250°C)
480°F
26" to 36"
(250°C)
3" to 12"
480°F
L-Vent
(250°C)
14" to 24"
480°F
L-Vent
(250°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.
Notes:
1. Unenclosed requires at least two sides open.
2. Single Wall (DS/DSLS) may be enclosed only in non-combustible enclosure.
3. Reduced clearances may be attained by using non-combustible enclosures.
4. Combusible 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.
Enclosed
Max
(4 sides)
(2 sides max.)
Temp
Horiz.
Vert.
Horiz.
550°F
N/A
N/A
(288°C)
550°F
N/A
N/A
(288°C)
550°F
N/A
N/A
(288°C)
Enclosed
Max
(4 sides)
(2 sides max.)
Temp
Horiz.
Vert.
Horiz.
550°F
N/A
1"
(288°C)
550°F
N/A
1"
(288°C)
550°F
N/A
2"
(288°C)
550°F
N/A
2"
(288°C)
550°F
N/A
2"
(288°C)
Unenclosed
Vert.
2"
2"
4"
4"
6"
6"
Unenclosed
Vert.
1"
1"
3"
1"
6"
2"
2"
2"
3"
2"
3
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