ProX

Have you considered a few different smaller units instead of one big unit? It’s a large space and normally you get better coverage and flow from multiple units. It would also keep the noise down because you could run them all on the lower setting. Also a good idea, and yes I did consisder that, sinc

I have an Alen 75i and on Speed 2 it says its 185 cfm. I cant hear it on that speed. I found it on sale for around same price as Coway Pro X (both on sale for $650 I think) and it has lifetime guarantee if you use their filter. Choice of a lot of carbon and less life in the Fresh filter or regular H

I have heard that too, and that they changed the filter at some point which caused problems. It seemed like more issues with the 45i. But I only know what I see in Reddit threads and that's not much. I tried Blue Air and Coway and Levoit and Winix and based on off gassing and noise levels I ended up