Installation Guide

Columbia Installation and Operation Manual
48
Note that secondary air tubes (A) can be replaced without removing the baffle front
support (B), the baffle board (C), the insulation blanket (D) and the insulation blanket
weight (E).
Important Notes:
The air tubes are identified for placement as follows:
Model Type of tube
Columbia
Front ► 40 holes of 0.156"
Middle ► 80 holes of 0.109"
Rear ► 80 holes of 0.109"