Exhaust pipe venting, Termination kits – Lennox Hearth G43UF User Manual
Page 7
G43UF / Page 7
EXHAUST PIPE VENTING TABLE
1
Maximum Equivalent Vent Length − One or Two Pipe Applications
Altitude
Vent Size
(diameter)
G43UF−24B−045
G43UF−24B−070
G43UF−36B−070
G43UF−36C−090
G43UF−48C−090
2
G43UF−48C−110
2
G43UF−60C−110
3
G43UF−60D−135
(
)
ft.
m
ft.
m
ft.
m
ft.
m
ft.
m
0 − 2000 ft.
(0 609
)
2 in.
110
34
70
21
50
15
30
9
n/a
n/a
(0 − 609 m)
2−1/2 in.
135
41
135
41
100
31
70
21
n/a
n/a
3 in.
160
49
160
49
125
38
125
38
4
125
4
38
4 in.
250
76
250
76
225
69
200
61
180
55
2001 − 4500 ft.
(610 1371
)
2 in.
110
34
70
21
50
15
20
6
n/a
n/a
(610 − 1371 m)
2−1/2 in.
135
41
135
41
100
31
70
21
n/a
n/a
3 in.
160
49
160
49
125
38
125
38
4
90
4
27
4 in.
250
76
250
76
225
69
200
61
180
55
4501 − 7500 ft.
(1372 2286
)
2 in.
110
34
70
21
30
9
n/a
n/a
n/a
n/a
(1372 − 2286 m)
2−1/2 in.
135
41
135
41
100
31
70
21
n/a
n/a
3 in.
160
49
160
49
125
38
125
38
4
90
4
27
4 in.
250
76
250
76
225
69
200
61
180
55
7501 − 10,000 ft.
(2287 3048
)
2 in.
110
34
70
21
n/a
n/a
n/a
n/a
n/a
n/a
,
(2287 − 3048 m)
2−1/2 in.
135
41
135
41
100
31
70
21
n/a
n/a
3 in.
160
49
160
49
125
38
125
38
4
90
4
27
4 in.
250
76
250
76
225
69
200
61
180
55
NOTE − Minimum Equivalent Vent Pipe length is 15 feet (4.6 m).
1
Maximum Equivalent Vent Length" permitted is defined as Total Length (linear feet) of vent pipe, plus equivalent length (ft.) of fittings, plus equivalent length (ft.) of termination".
2
110 models must have the supplied 90° street ell installed directly into the unit flue collar. The street ell must be included in the elbow count.
3
135 models must have 3 in. to 2 in. reducing elbow (supplied) installed directly into the flue collar. Reducing ell must be included in elbow count.
4
90
_ elbows must be limited to 3 in. sweep type elbows.
VENTING NOTES Ċ One 90
_elbow is equivalent to 5 feet (1.5 m) of straight vent pipe.
Two 45
_ elbows are equal to one 90_ elbow.
One 45
_ elbow is equivalent to 2.5 feet (.75 m) of straight vent pipe.
Wall and roof termination (non−concentric) exhaust pipe must terminate with reducer to improve exhaust velocity away from intake piping.
045 and 070 − 2, 2−1/2, 3 or 4 in. − terminate with 1−1/2 in. pipe
090 − 2, 2−1/2, 3 or 4 in. − terminate with 2 in. pipe
110 − 2, 2−1/2, 3 or 4 in. − terminate with 2 in. pipe
135 − 3 or 4 in. − terminate with 2 in. pipe
TERMINATION KITS − EQUIVALENT VENT LENGTHS
Vent Pipe Equivalent Length − ft. (m)
Heat
Vent Pipe
Diameter
Concentric
Kits
Close Couple
Kits
Wall Ring
Kit
Outdoor Exhaust
Accelerator
(Diameter X Length)
Heat
Size
1−1/2 in.
(38 mm)
2 in.
(51 mm)
3 in.
(76 mm)
2 in.
(51 mm)
3 in.
(76 mm)
2 in.
(51 mm)
1−1/2 x 12 in.
(38 x 305 mm)
2 x 12 in.
(51 x 305 mm)
in.
mm
71M80
69M29
60L46
22G44
30G28 (WTK)
44J40
81J20 (WTK)
15F74
− − −
− − −
2
51
12 (3.6)
not allowed not allowed
4 (1.2)
1
4 (1.2)
4 (1.2)
4 (1.2)
not allowed
045
2−1/2
64
15 (4.6)
not allowed not allowed
5 (1.5)
1
5 (1.5)
5 (1.5)
5 (1.5)
not allowed
−045
3
76
21 (6.4)
not allowed not allowed
7 (2.1)
1
7 (2.1)
7 (2.1)
7 (2.1)
not allowed
4
102
42 (12.8)
not allowed not allowed
14 (4.3)
1
14 (4.3)
14 (4.3)
14 (4.3)
not allowed
2
51
12 (3.6)
not allowed not allowed
4 (1.2)
1
4 (1.2)
4 (1.2)
4 (1.2)
not allowed
070
2−1/2
64
15 (4.6)
not allowed not allowed
5 (1.5)
1
5 (1.5)
5 (1.5)
5 (1.5)
not allowed
−070
3
76
24 (7.3)
not allowed not allowed
8 (2.4)
1
8 (2.4)
8 (2.4)
8 (2.4)
not allowed
4
102
42 (12.8)
not allowed not allowed
14 (4.3)
1
14 (4.3)
14 (4.3)
14 (4.3)
not allowed
2
51
not allowed
3 (1)
3 (1)
not allowed
1 (0.3)
2
1 (0.3)
not allowed
1 (0.3)
090
2−1/2
64
not allowed
6 (1.8)
6 (1.8)
not allowed
2 (0.6)
2
2 (0.6)
not allowed
2 (0.6)
−090
3
76
not allowed
6 (1.8)
6 (1.8)
not allowed
2 (0.6)
2
2 (0.6)
not allowed
2 (0.6)
4
102
not allowed
12 (3.7)
12 (3.7)
not allowed
4 (1.2)
2
4 (1.2)
not allowed
4 (1.2)
2
51
not allowed
3 (1)
3 (1)
not allowed
1 (0.3)
2
1 (0.3)
not allowed
1 (0.3)
110
2−1/2
64
not allowed
6 (1.8)
6 (1.8)
not allowed
2 (0.6)
3
2 (0.6)
not allowed
2 (0.6)
−110
3
76
not allowed
6 (1.8)
6 (1.8)
not allowed
2 (0.6)
3
2 (0.6)
not allowed
2 (0.6)
4
102
not allowed
12 (3.7)
12 (3.7)
not allowed
4 (1.2)
3
4 (1.2)
not allowed
4 (1.2)
135
3
76
not allowed not allowed
15 (4.6)
not allowed
6 (1.8)
3
6 (1.8)
not allowed
6 (1.8)
−135
4
102
not allowed not allowed
25 (7.6)
not allowed
10 (3.0)
3
10 (3.0)
not allowed
10 (3.0)
1
Requires field provided 1−1/2 in. (38 mm) outdoor exhaust accelerator.
2
Requires field provided 2 in. (51 mm) outdoor exhaust accelerator.
3
For use only in non−direct vent applications, when snow riser is not required. Requires field provided 2 in. (51 mm) outdoor exhaust accelerator.