Levoit Core 300S vs Blueair Blue Pure 511i Max

The Blueair Blue Pure 511i Max is the better pick over the Levoit Core 300S if you want a compact purifier that can clean the air more quickly without becoming intrusive. Both models are built for small- to medium-sized rooms and share a similar feature set, including app connectivity, air quality monitoring, and automatic fan adjustment, but the Blueair delivers stronger particle filtration both at maximum fan speed and when operating quietly. Its app also gives you finer control over fan speed, letting you get more cleaning performance while staying within a low-noise range. The Levoit still has some advantages, though, including a wider selection of specialty replacement filters and more extensive onboard controls.