I have the GF filter but with the cost of cartridges I opted to vent outside whenever possible. Unfortunately for me, the room where my GF is located in doesn’t have a window near it so I used an exhaust port extension and ran a 4" duct to the nearest window. The exhaust port extension acts as a quick-connect on the GF side very nicely. I rigged up a piece of pine with a draft blocker and a small shelf where the fan can sit while I use it. It’s bit of a jerry rig but I wanted something that could be removed and stored in the garage easily and not make permanent changes to my newly installed windows. It works very well though, the cool thing is that the AC Infinity 6" speed controller is long enough that it reaches my desk so I can control the speed easily and adjust if needed as the GF is cutting. Here’s what I used and a couple pics.
https://www.amazon.com/gp/product/B074TF6JB2/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1
