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2-Ply Aluminum Flex Vent
The minimum vent system for horizontal termination must consist of:
15" (305 mm) vertical length (measured to center of vent pipe) with a 90 degree bend and a
15" (305 mm) horizontal length (measured from center of vent pipe)
Wall thimble part# IMC1082A
Horizontal termination cap part # IMC1070A or IMC1070B
The maximum horizontal vent system consists of:
34' (10363 mm) vertical length with a 4 - 90 degree bends and a 20' (6096 mm) horizontal
length (measured to center of vent pipe)
Wall thimble part# IMC1082A
Horizontal termination cap part # IMC1070A or IMC1070B
Note: 2-Ply Horizontal venting shall be supported, by means of a steel strap, every 3'.
The maximum vertical system consists of:
Up to 34' (10363mm) of vertical length
Fire stop
Flashing
Collar
Adapter from flex to Simpson Dura-Vent part #P574
Termination cap part # 0991
A maximum of 4 – 90 degree bends can be used on the vertical installation venting. The maximum
height for this vent configuration is 34' (10363 mm) and the minimum height is 4' (1200 mm).
The maximum horizontal run is a total of 20' (6096mm). When fastening the flex vent to the
termination and to the unit use a minimum of 3 # 8 x ½" hex head sheet metal screws on the 4" vent
and a minimum of 4 - # 8 x ½" hex head sheet metal screws on the 7" vent.
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