Submittal
14
Read these instructions before beginning. You must use
only authorized DuraVent PolyPro vent parts, or other
parts specifically authorized in these instructions and/or
listed by the appliance manufacturer in order to maintain a
safe, approved system.
• Do not fill any air space clearance (Table 1) with
insulation.
• Do not mix parts or try to match with other products
or use improvised solutions.
• Do not install damaged or modified parts.
• Use soapy water to lubricate gaskets.
• Never use Petroleum base lubricants.
If these directions and those of the appliance
manufacturer differ, follow the more conservative
requirements. If you have any questions, contact either
your dealer or DuraVent directly. A venting system must
not be routed into, through, or within any other vent,
such as an existing masonry or factory-built chimney
flue, unless that vent or chimney is not being used to
vent another appliance and is only used as a conduit for
the gas-vent system. Plastic venting systems shall not
pass through fire rated separations without approved
firestopping.
PolyPro attains Flame Spread / Smoke Developed ratings
of <25 / <50 (per UL-723, ASTM E-84 and ULC-S102)
when used in conjunction with the below noted materials:
• 3M Fire Barrier Plenum Wrap 5A+
• Unifrax FyreWrap 0.5 Plenum Insulation
• Knauf Insulation- Atmosphere Duct Wrap with ECOSE
• Alternate equivalent listed product
Table 1
Clearance to Combustibles
VENT PIPE ORIENTATION
Single Wall Vertical Horizontal
Up to 190°F 0" 0"
Up to 230°F 0" ¼" (6mm) all around
Concentric
Up to 230°F 0" 0"
Table 2 - Equivalent Length Chart
2" Equivalent
Length
3" Equivalent
Length
4" Equivalent
Length
5" Equivalent
Length
6" Equivalent
Length
8" Equivalent
Length
1-ft Vent Pipe 1-ft 1-ft 1-ft 1-ft 1-ft 1-ft
1-ft Flex Pipe
2-ft
(same diameter as
rigid)
2-ft
(same diameter as
rigid)
2-ft
(same diameter as
rigid)
2-ft
(same diameter as
rigid)
N/A N/A
1-ft Flex Pipe
0.4-ft
(updsized one
diameter)
0.6-ft
(updsized one
diameter)
0.6-ft
(updsized one
diameter)
N/A N/A N/A
45 Elbow 3-ft 3-ft 5-ft 6-ft 6-ft 13-ft
90 Elbow 5-ft 7-ft 12-ft 14-ft 14-ft 19-ft
Tee 9-ft 12-ft 19-ft 21-ft 22-ft 29-ft
SECTION D - GENERAL INSTALLATION NOTES
Always follow the particular installation instructions from
the insulation wrap manufacturer, in addition to those for
the PolyPro vent system. The venting system shall be
securely supported using suitable hangers installed after
the pipe has been properly wrapped. Hardware must not
deform or damage the vent or wrap.
Refer to the appliance manufacturer’s instructions for
maximum and minimum vent lengths permitted with your
specific appliance model. This information should include
guidance on the maximum number of elbows and related
pressure-drops. The total vent length from the appliance
to the termination shall not be greater than specified by
the appliance manufacturer. If specific guidance is not
offered by the appliance manufacturer as to Equivalent
Vent Lengths (EVL) for vent components, the general
guidelines in Table 2 can be used.