Enerzone EB00025 Installation And Operation Manual page 52

Note that secondary air tubes (B) can be replaced without removing the baffle board (A).
Important Notes:
The air tubes are identified for placement as follows:
Model Type of tube
Front ► 30 holes of 0.140"
Destination 1.6
Middle front ► 30 holes of 0.136"
Middle rear ► 20 holes of 0.147"
Rear ► 15 holes of 0.128"
52
Destination 1.6 Installation and Operation Manual