Century FW2600 Installation And Operation Manual page 48

Century FW2600 Installation and Operation Manual
Note that secondary air tubes (A) can be replaced without removing the baffle board (B).
Important Notes:
The air tubes are identified for placement as follows:
Model
FW2600
48
Type of tube
Front ► 30 holes of 0.140"
Middle front ► 30 holes of 0.136''
Middle rear ► 20 holes of 0.147''
Rear ► 15 holes of 0.128''