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2-Ply Aluminum Flex Vent
The minimum vent system for horizontal termination must consist of:
24" (609.6 mm) vertical length (measured to center of vent pipe) with a 90 degree bend and a
12" (305 mm) horizontal length (measured from center of vent pipe)
Wall thimble
Horizontal termination cap TTK58
The maximum horizontal vent system consists of:
40' (12192 mm) vertical length with a 4 - 90 degree bends and a 20' (6096 mm) horizontal
length (measured to center of vent pipe)
Wall thimble
Horizontal termination cap TTK58
Note: 2-Ply Horizontal venting shall be supported, by means of a steel strap, every 3'.
The maximum vertical system consists of:
Up to 40' (12192mm) of vertical length
Fire stop
Flashing
Collar
Adapter from flex to Simpson Dura-Vent part 58DVA-FCM
Termination cap
A maximum of 4 – 90 degree bends can be used on the vertical installation venting. The maximum
height for this vent configuration is 40' (12192 mm) and the minimum height is 4' (1219 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 5" vent
and a minimum of 4 - # 8 x ½" hex head sheet metal screws on the 8" vent.
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