Bosch C 950 - Page 20

Installation instructions
C 950/C 1050 (Pro TL 175 C/199 C) – 6 720 805 440 (2019/10)
20
Combustion air
Table 18
Table 19
For this example, the maximum allowable combustion air pipe
length is 55 feet.
Calculation example for 2" PVC venting:
Exhaust
Table 20
Table 21
For this example, the maximum allowable exhaust pipe length is
4.5 feet.
Combustion air
Table 22
Table 23
For this example, the maximum allowable combustion air pipe
length is 4.5 feet.
System used Twin pipe
Number of 90° elbows needed: 2
Number of 45° elbows needed: 2
Calculation of example
Max. length 63’
90° elbow reduction - 5’
sub-total = 58’
45° elbow reduction - 3’
Total = 55’
System used Twin pipe
Number of 90° elbows needed: 1
Number of 45° elbows needed: 0
Calculation of example
Max. length 9.5’
90° elbow reduction - 5’
sub-total = 4.5’
45° elbow reduction - 0’
Total = 4.5’
System used Twin pipe
Number of 90° elbows needed: 0
Number of 45° elbows needed: 2
Calculation of example
Max. length 9.5’
90° elbow reduction - 0’
sub-total = 9.5’
45° elbow reduction - 5’
Total = 4.5’