Enerzone EB00027 Installation And Operation Manual page 32

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
Destination 2.3 stove
Front ► 30 holes of 3.75 mm
Middle front ► 30 holes of 3.5 mm
Middle rear ► 20 holes of 3.25 mm
Rear ► 15 holes of 3.25 mm
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Destination 2.3 Installation and Operation Manual