Oneida Air Systems 2 HP Commercial Cyclonic Dust Collector Owner's Manual page 4

II. 2hp Commercial Configurations
1. No Filter - Vent Outside -
Caution:
2. External Cartridge Filter -
Do NOT remove fabric straps from filter.
3. External Tube Filters -
2HP Commercial Wood Dust Collector Owner’s Manual
Silencer Included with Filter
3. External
O.A.S. 2004
1. No Filter
2. External
Cartridge
Filter
Tube
Filter