NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
10
Figure 13
Figure 14
Horizontal Run (in feet)
Vertical Run (in feet)
Measure from the appliance fl ue collar to the top of the vent pipe
Unacceptable
Venting
Confi guration
Vertical Terminations Must
be in this area
Vertical Run (in feet)
Measure from the appliance fl ue collar to the top of the vent pipe
Horizontal Run (in feet)
May use up to three 90
degree elbows
One 90
degree
elbow
Unacceptable
Venting
Confi guration
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
10
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
2
1
3
4
5
67
89
10
11
12
13 14
15 16 17
18 19
20
2
1
0
1
2
3
4
5
6
7
8
9
3
4
56789
10
11
12
13 14
15 16 17
18 19
20
10
11
12
13
14
10
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
The vent must rise vertically, a minimum of 24" (610 mm) off the
top of the appliance for Natural Gas and 36" for Propane Gas before
the fi rst elbow.
The horizontal run may extend up to 20 feet ( 6 meters) and include
a vertical rise of up to 40 feet (12 meters) - see Figure 13. Horizontal
termination must meet the criteria shown in Figures 4 and 5.
• Approved vent systems must terminate above and including the
heavy line in Figure 13.
• Two 45 degree elbows may be substituted for each single 90 degree
elbow.
• With a rise between 2 feet to 5 feet, one 90 degree or two 45 degree
elbows may be used.
A vertical vent system must terminate no less than 8 feet ( 2.44 meters)
and no more than 40 feet / 12 meters ( above the appliance fl ue collar.
See Figure 14.
A vertically terminated vent system must also conform to the follow-
ing criteria:
No more than three 90 degree elbows may be used.
Two 45 degree elbows may be substituted for one 90 degree elbow. No
more than six 45 degree elbows may be used.
Vent must rise a minimum of 2 feet before an offset is used.
Termination height must conform to roof clearance as specifi ed in
Figure 3
Horizontal Termination
Vertical Termination
