I think I was just trying to match the CFM of my Coway purifier, since I was using the same filters. I was also worried it would be harder to properly mate a larger/heavier fan to a box. Now that I’ve actually built the thing, I would say the larger fan is probably better.
Why the 6in fan rather than the 8in one? Would seem to move a lot more air for nearly the same price.
I think I was just trying to match the CFM of my Coway purifier, since I was using the same filters. I was also worried it would be harder to properly mate a larger/heavier fan to a box. Now that I’ve actually built the thing, I would say the larger fan is probably better.