Levoit Core 400S smart air purifier reviewed

The Levoit Core 400S is a smart air purifier designed for larger spaces up to 83 square meters, featuring an air cleaning rate of 400 m³ per hour. The device utilizes a three-stage filtration system consisting of a pre-filter, a HEPA filter capable of capturing 99.97 percent of particles as small as 0.3 micrometers, and an activated carbon filter.

Key features include a laser sensor for PM2.5 monitoring, four power levels, and an automatic mode. Users can control the device via the VeSync app or through voice commands using Google Assistant and Alexa. The unit operates at noise levels between 24 dB in sleep mode and 48 dB, with a maximum power consumption of 24 watts.

In a 2022 Stiftung Warentest, the model received an overall grade of 3.5, ranking fifth out of seven tested units. While it earned high marks for environmental properties and safety, the air cleaning performance was rated at 4.0. Strengths noted include the quiet sleep mode, particle sensor, and Wi-Fi connectivity, though it was considered too large for smaller apartments.