Secure Seal
®
Single-Wall, Double-Wall
and Insulated Double-Wall
Special Gas Vent
AL29-4C® Vent System for Category I, II, III, IV Gas-Fired & L-Vent
Listed Appliances
Secure Seal®
The Secure Seal® SS and SSD/SSID
venting system offers the complete
package for modern venting and
reliability. Manufactured from
AL29-4C® (a super-ferritic stainless
steel), the single- and double-wall
SS and SSD/SSID install effortlessly
and answer the need for enhanced
reliability and industry
specifications requirements.
Featuring a double wall, the SSD's
outer casing is manufactured from
type 441 stainless steel to provide
long-lasting performance and
stability when exposed to the
outdoors. With self-sealing Secure
Seal gaskets, the SS, SSD and SSID
make installation quick and easy.
SS /SSD
Applications
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Feature
Laser butt-welding
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Benefit
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Secure Seal®
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AL29-4C® stainless steel
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stainless steel
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Typical Installation
TYPICAL INSTALLATION
Exit Cone (EC)
Minimum slope
1/4” per foot
Cables, rods
Or braces
By other
Opening dimension
Suspension Band (SB)
Guy wires by others
500 lbs rated
Flashing
(F)
Roof Support
(RS)
Maximum distance between
support (MHS)
Maximum
free-standing
height (H)
30º Termination
(STA)
Minimum Clearances
Wall Thimble
(WT/WTI)
Maximum distance
between guides (MVS)
Opening
dimension
Roof
support
(RS)
Maximum distance
between guides (MVS)
Roof
thimble
(RT/RTI)
Guy wire band
(GWB)
Minimum
Clearance
Anchor Plate HD
(APHD)
Maximum distance
between elbows (MDE)
Maximum distance
suspended (S)
Wall support
(WS)
Appliance
Refer to condensate drain
section for proper installation
Maximum distance
between supports
Appliance
adaptor
Figure 1 - Horizontal
Maximum
distance between
guides (MVS)
Wall guide
(WG)
Wall guide
(WG)
Secure Seal Single Wall (SS)
Minimum Clearance to Combustibles
Diameter
Rated
Enclosed
Max flue gas
operating
temperature )PSJ[POUBM 7FSUJDBM
temperature
Unenclosed
Wall support HD
(WSHD)
Appliance adaptor
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4" to 12"
480° F
550° F
N/A
N/A
2"
2"
14" to 24"
480° F
550° F
N/A
N/A
4"
4"
Appliance
Secure Seal Double Wall (SSD/SSID)
Minimum Clearance to Combustibles
Diameter
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Rated
Enclosed
Unenclosed
Max flue gas
operating
temperature )PSJ[POUBM 7FSUJDBM )PSJ[POUBM 7FSUJDBM
temperature
4" to 12"
480° F
550° F
N/A
1"
1"
1"
14" to 24"
480° F
550° F
N/A
1"
3"
1"
4" to 12"
(L-Vent)
480° F
570° F
N/A
2"
2"
2"
14" to 24"
(L-Vent)
480° F
570° F
N/A
2"
3"
2"
Material Thickness
Inner Wall Material Thickness (AL29-4C®*)
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Outer Wall Material Thickness (441)
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*AL29-4C® is a registered trademark of Allegheny Ludlum Corporation.
Figure 2 - Vertical
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NOTE: Diagrams, illustrations and photographs are not to scale – consult
installation instructions. Product designs, materials, dimensions, specifications,
colors and prices subject to change or discontinuance without notice.
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