Drolet HEATMAX II Installation And Operating Instructions Manual page 63

HeatMax II Furnace 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 Type of tube
HEATMAX II Front (1) ► 106 holes of 0.109"
Middle front (2) ► 53 holes of 0.109"
Middle rear (3) ► 53 holes of 0.109"
Rear (4) ► 53 holes of 0.109"
63