Bosch 830 ES Manual page 13

Calculation example for 3" venting:
Exhaust
System used
Number of 90° elbows needed:
Number of 45° elbows needed:
Table 11
Calculation of example
Max. length
90° elbow reduction
sub-total =
45° elbow reduction
Total =
Table 12
For this example, the maximum allowable exhaust pipe
length is 23,5 feet.
Combustion air
System used
Number of 90° elbows needed:
Number of 45° elbows needed:
Table 13
Calculation of example
Max. length
90° elbow reduction
sub-total =
45° elbow reduction
Total =
Table 14
For this example, the maximum allowable combustion
air pipe length is 22,25 feet.
830 ES
Calculation example for 4" venting:
Exhaust
Concentric
1
2
Table 15
28,5'
- 2,5'
26'
- 2,5'
23,5'
Table 16
Combustion air
Concentric
2
1
Table 17
28,5'
- 5'
23,5'
- 1,25'
22,25'
Table 18
System used
Number of 90° elbows needed:
Number of 45° elbows needed:
Calculation of example
Max. length
90° elbow reduction
sub-total =
45° elbow reduction
Total =
For this example, the maximum allowable exhaust pipe
length is 57,25 feet.
System used
Number of 90° elbows needed:
Number of 45° elbows needed:
Calculation of example
Max. length
90° elbow reduction
sub-total =
45° elbow reduction
Total =
For this example, the maximum allowable combustion
air pipe length is 58,5 feet.
Installation instructions | 13
Twin pipe
2
2
61,25'
- 2,5'
58,75'
- 1,5'
57,25'
Twin pipe
1
2
61,25'
- 1,25'
60'
- 1,5'
58,5'
6 720 644 936 (2013/01)