Levoit Core 400S-P vs Winix 5520

The Winix 5520, narrowly. It is the lower priced of the two and the one with a certified True HEPA filter and a washable pre-filter, which is the deeper stack. The Levoit Core 400S-P wins back with an ozone-free and Energy Star certified design, a numeric screen and a better owner rating, and it is the better bedroom pick.

The filter stack. The Winix 5520 uses a certified True HEPA filter behind a washable fine mesh pre-filter and adds a switchable PlasmaWave stage, while the Levoit Core 400S-P uses an H13 True HEPA cartridge with no washable pre-filter and no ionizer, which keeps it ozone-free.

The Levoit Core 400S-P is AHAM Verifide at 231 CFM for 358 sq ft, and the Winix 5520 at 253 CFM for 392 sq ft. Both figures come from the same AHAM chamber test, so they are directly comparable.

No. Its PlasmaWave stage is an ionizer, so it is not listed as ozone-free and it carries no Energy Star certification either. The Levoit Core 400S-P, by contrast, is certified ozone-free because its filtration is purely mechanical.

Both work with Home Assistant, the Winix 5520 through a community integration and the Levoit Core 400S-P through the official VeSync integration. Neither supports Apple HomeKit, SmartThings or Matter, and both are 2.4 GHz Wi-Fi only.

A bedroom or living-room buyer who wants a numeric screen, an ozone-free design and the lighter power draw, and who does not need a washable pre-filter or independently certified True HEPA wording.