Key Features

• 📊 High Clean Air Delivery Rate (CADR): Rated around 260 CFM (~442 m³/h) for dust and particles, making it well-suited for living rooms and open spaces.
• 📱 Smart App & Voice Control: Connects via VeSync app, supports Amazon Alexa & Google Assistant enabling remote control and scheduling.
• 🔇 Quiet & Efficient Operation: Produces just ~42 dBA in Sleep Mode, consumes as low as ~0.9W on standby, and remains efficient when filtering heavily.
• 🧬 Advanced Filtration: Features a thick activated carbon layer and particle filter which in tests brought PM2.5 levels down to 0.1 µg/m³ in under an hour.

Pros & Cons

• Pros: Excellent purification performance for its size; smart features for convenient operation; strong value for medium-large rooms.
• Cons: Larger footprint than compact models; higher fan speeds may be audible in quiet spaces; filter replacements and higher-speed modes consume more than basic units. Some users also raised concerns about noise and filter costs.

Who Should Buy It?

If you have a living room, open-plan area or large bedroom (~30–40 m²), suffer from allergies, pet dander, or indoor air pollutants, or you want smart control and real-time monitoring—this is a great choice. If your space is very small or you only need basic air cleaning, a smaller model may suffice.

Conclusion

In its class, the LEVOIT Core 400S stands out for combining performance, connectivity and smart features. While it isn’t ultra-compact or ultra-silent on its highest speed, for most users dealing with moderate to large rooms it delivers a clear improvement in air quality with minimal hassle. For those looking to “set and forget” a quality air purifier with smart controls, this one is worth strong consideration.