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Installation instructions
C 1210 ES/ESC
6 720 644 887 (2013/02)
Calculation example for 4" venting:
Exhaust
Combustion air
System used
Twin pipe
Number of 90° elbows needed:
1
Number of 45° elbows needed:
2
Table 15
Calculation of example
Max. length
63’
90° elbow reduction
- 2.5’
sub-total =
61.5’
45° elbow reduction
- 3’
Total =
58.5’
Table 16
For this example, the maximum allowable exhaust pipe
length is
58.5 feet
.
System used
Twin pipe
Number of 90° elbows needed:
2
Number of 45° elbows needed:
2
Table 17
Calculation of example
Max. length
63’
90° elbow reduction
- 5’
sub-total =
58’
45° elbow reduction
- 3’
Total =
55’
Table 18
For this example, the maximum allowable combustion
air pipe length is
55 feet
.
