Blue Pure 211+

This! I just got my luggable to replace my blue air 211+ and it is quieter running than the Blueair is on the lowest setting. 300sq ft of coverage gives 5 air changes in an hour, I believe. Plus, it's going to cost me $4/month for filters if I change them out every 6 months.

I have two Blueair purifiers that can get very loud on the highest setting--the 211+ Auto and the Classic 500/600. The latter one was discontinued and the 211+ can still be bought at Amazon, but not at Blueair. Finding OEM filters is no problem for either. You might also consider a sound machine tha

I totally agree, spent a lot more money on the 211+ Auto model with the idea of having it for a long time....now they quit selling the filters??? they wont get my business again. Blueair has great air purifiers but they are not priced in a way that they should be considered a one time use machine. t