Blueair Blue Pure 211i Max vs Levoit EverestAir-P

The Levoit EverestAir-P is better overall than the Blueair Blue Pure 211i Max, though the Blueair is stronger if particle filtration performance is your main concern. The Blueair has a higher maximum CADR and also moves considerably more clean air at quieter fan settings. That said, the EverestAir-P is quieter at its lowest setting, gives you more detailed particle monitoring, and its slimmer shape is easier to place close to a wall. The Levoit also doesn't rely on an ionizer, unlike the Blueair, so you don't have to account for the small amount of ozone that ionization systems can produce.