Model type of tube – Osburn OB01520 User Manual
Page 60
Soho Installation and Operation Manual
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Note that any secondary air tube (B) can be replaced without removing the baffle (A).
Important Notes:
The air tubes are identified for placement as follows:
Model
Type of tube
Soho stove
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"