507270-03B
Page 20 of 58
Issue 1904
BG921UH Maximum Allowable Exhaust Vent Length with Furnace Installed in a Closet or Basement Using
Ventilated Attic or Crawl Space for Intake in Feet
Standard Termination at Elevation 0 - 10,000 ft
Number of 90°
Elbows Used
2" Pipe
2-1/2" Pipe
3" Pipe
Capacity
Capacity
Capacity
045
070
090
045
070
090
045
070
090
1
66
51
29
95
80
48
112
112
93
2
61
46
24
90
75
43
107
107
88
3
56
41
19
85
70
38
102
102
83
4
51
36
14
80
65
33
97
97
78
5
46
31
9
75
60
28
92
92
73
6
41
26
4
70
55
23
87
87
68
7
36
21
n/a
65
50
18
82
82
63
8
31
16
60
45
13
77
77
58
9
26
11
55
40
8
72
72
53
NOTE
: Additional vent pipe and elbows used to terminate the vent pipe outside the structure must be included in the total vent length
calculation.
Table 5B.
Содержание BG921UH
Страница 3: ...507270 03B Page 3 of 58 Issue 1904 Parts Arrangement Figure 1 ...
Страница 24: ...507270 03B Page 24 of 58 Issue 1904 Figure 25 Figure 26 ...
Страница 38: ...507270 03B Page 38 of 58 Issue 1904 Figure 58 Trap Drain Assembly Using 1 2 PVC or 3 4 PVC ...
Страница 44: ...507270 03B Page 44 of 58 Issue 1904 Figure 67 Typical Wiring Diagram ...