I recently was lucky enough to purchase an older 3hp Oneida cyclone (originally from 1998), for $300 with a bunch of gates and ducting! The system has an 8” round inlet and 6.5” x 7.5” rectangle outlet. The system was originally set up with (6) 8’ long 12” felt tube filters mounted to a custom plenum. These filters take up too much space for my shop so I’m looking switch to a new canister style filter. Oneida offers a filter upgrade kit to one of their spun bound filters but they use an 8” round duct...the outlet on my system is 6.5” x 7.5” and I’m having trouble finding this transition. Another option is I could make a plywood plenum box and mount Wynn nano filters.

I have so many thoughts on what to do going back and forth in my head that I’m getting stuck... Has anyone upgraded the filters on an older Oneida system and mind sharing what you did for inspiration?

Thanks!