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Venting and Combustion Air Installation
NOTICE
The maximum equivalent length is the
total length of the venting and the com-
bustion air inlet combined. This includes
termination fittings.
NOTICE
F o r Delta PERFORMANCE PLUS
applications that may exceed the 100 feet
maximum allowable equivalent length
for the venting system, contact Triangle
Tube Engineering Department for addi-
tional information on how the appliance
can be adjusted to the application.
Table 2- Allowable Equivalent Length (Combined Vent and Combustion Air)
Maximum
Allowable for
Linear Length Combined
PERFORMANCE PLUS
Fig. 19: Standard Ve rtical Venting Installation
-
For each elbow included in the system,
the maximum allowable linear length
must be reduced as follows:
• Each 90º elbow within the system is
• Each 45º elbow within the system is
It is recommended that the installer uses the
same number of elbows and length of piping on
the venting system and the combustion air
inlet.
Total Elbows within the Venting / Combustion Air System
2
3
4
180
170
160
Fig. 20: Ve rtical - Direct Vent Combination
33
the equivalent of 10 linear feet.
the equivalent of 5 linear feet.
5
6
150
140
7
130
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