Drolet HEATPRO DF03000 Installation And Operating Instructions Manual page 61

HeatPro 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
Front ► 77 holes of 0.147"
HEATPRO
Middle front ► 77 holes of 0.161"
Middle rear ► 77 holes of 0.180"
Rear ► 77 holes of 0.194"
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