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Unit Installation with Vertical Termination
Galvanized pipe is desirable above the roofline
due to its higher corrosion resistance . Continue
to add pipe sections through the flashing until
the height of the vent cap meets the minimum
height requirements specified in this manual or
local codes . Note that for steep roof pitches, the
vertical height must be increased .
7 . Ensure vent is vertical and secure the base
of the flashing to the roof with roofing rails,
slide storm collar over the pipe section and
seal with a mastic .
8 . Install the vertical termination cap by twist
locking it .
!
NOTE: Any closets or storage spaces, which
the vent passes through must be enclosed .
Diagram 4
Vent
Height
Roof Pitch
flat to 7/12
over 7/12 to 8/12
over 8/12 to 9/12
over 9/12 to 10/12
over 10/12 to 11/12
over 11/12 to 12/12
over 12/12 to 14/12
over 14/12 to 16/12
over 16/12 to 18/12
over 18/12 to 20/12
over 20/12 to 21/12
A poor draft, or down drafting can result from high wind
conditions near big trees or adjoining roof lines, in these
cases . Increasing the vent height may solve the problem .
Offset
inches
mm
inches
4 ¾
121
0
9
229
6
11 ¼
286
9
13 ¼
337
12
21 ¾
552
24
30 ¼
768
36
38
965
48
See DuraVent or ICC manufacturer's guidelines for
minimum cutout dimensions or frame openings around
wall venting . Make sure clearances to combustible
material are maintained based on vent part used .
! NOTE: Cutout sizes vary according to the DuraVent or
ICC part number used .
Minimum Vent Height
Feet
2
2
2
2 ½
3 ¼
4
5
6
7
7 ½
8
Pipe Length
Height
mm
inches
0
13 ¼
152
17 ½
229
19 ½
305
21 ¾
610
30 ¼
914
39
1219
47
Meters
0 .61
0 .61
0 .61
0 .76
0 .99
1 .22
1 .52
1 .83
2 .13
2 .29
2 .44
mm
337
445
495
552
768
991
1194
34
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