Levoit Core 400S vs Core 300S

If the Core 300S feels a little too small for your needs, the Levoit Core 400S is the natural next step. Both purifiers share a similar set of convenience features, including app connectivity, voice control, automatic fan adjustment, and remote scheduling, but the 400S delivers substantially stronger air-cleaning performance thanks to its larger size and more powerful motor. That makes it a much better fit for larger bedrooms, living rooms, and open-concept spaces where the 300S can start to struggle. The tradeoff is a considerably larger footprint and a higher price tag, which is what makes the 300S the more practical choice when the smaller size is actually an advantage.