# Levoit Core400S Smart HEPA Air Purifier

Smart: The Levoit Core400S is a corded HEPA air purifier with a PM2.5 sensor, automatic fan adjustment and app control. Its 24 dB figure applies to quiet sleep mode, while its stated room coverage differs across the listing, so check the coverage claims against your room size before buying.

- [Original product page](https://bargainpostbox.co.uk/product/levoit-core400s-smart-hepa-air-purifier)
- [View offer](https://bargainpostbox.co.uk/visit/levoit-core400s-smart-hepa-air-purifier)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: Levoit
- Model: Core400S
- Category: Home & Kitchen > Heating, Cooling & Air Quality > Air Purifiers
- Price: 175.99 GBP
- Previous price: 219.99 GBP
- Discount: 20%
- Price checked: 2026-11-12T18:10:55.563Z
- Rating: 4.6 / 5
- Reviews: 23696

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Three-stage filtration is described as including HEPA and active carbon filtration. The listing says carbon reduces fireplace smoke and odours.
- AirSight Plus detects PM2.5 and Auto Mode adjusts fan speed in response, according to the listing.
- The stated 24 dB noise figure is specifically for quiet sleep mode, with display lights off.
- App control and voice control are listed, alongside hand controls.

## Pros

- A PM2.5 sensor and automatic fan adjustment can reduce the need to change fan speed manually.
- The claimed 24 dB sleep mode gives buyers a low-noise setting to consider for bedroom use.
- The listed active carbon stage adds an odour and smoke-reduction function beyond particle filtration.

## Specifications

### Identity
- Brand: Levoit
- Model: Core400S
- Colour: Off White
- Filter type: HEPA
- Particle retention size: 0.3 Micron
### Air cleaning and operation
- CADR: 433m³/h
- Coverage in title: 180m²
- Floor area in details: 1787 Square Feet
- Noise level: 24 Decibels
- Wattage: 24 watts
- Special features: 3- Stage Filtration, AirSight Plus PM 2.5 sensor, QuietKEAP only 24dB in quiet sleep mode, Stable WiFi and Bluetooth dual connection, VortexAir circulation technology
### Connectivity and controls
- Control method: Voice
### Power and dimensions
- Power configuration: Corded Electric
- Dimensions: 27.4D x 27.4W x 51.9H centimetres
- Weight: 4.96 Kilograms
### Other listed details
- Specification met: CE Certified, RoHS Certified
- Warranty: 2 year warranty.

## Before you buy

- Listing details are inconsistent on coverage: the title says 180m², the specification says 1787 Square Feet and feature text describes 36㎡ in 12 minutes and 90㎡ in 30 minutes. The CADR of 433m³/h is also presented alongside those different coverage claims, so confirm the suitable room size and rating basis before purchase. The 24 dB figure applies only to quiet sleep mode.

## A good fit for

- Buyers wanting a smart air purifier with PM2.5 sensing and automatic fan adjustment.
- Bedroom users who value a specifically stated quiet sleep mode.
- Households seeking HEPA filtration with an additional carbon stage for odours, subject to the listing’s room-coverage discrepancies.

## Less suited to

- Buyers who need a clearly consistent, substantiated room-coverage figure before choosing a purifier.
- Those seeking a battery-powered unit, as the listed power configuration is corded electric.

## Customer feedback

Customer feedback reports effective air cleaning and reduced dust and odours, with some customers describing quieter operation on the lowest setting, straightforward app use and allergy-related relief. These experiences may matter to buyers considering its HEPA filtration, sensor and sleep mode, but they do not establish performance for every home or resolve the listing’s conflicting room-coverage figures. The overall rating distribution is strongly weighted towards five- and four-star ratings, while a smaller share is lower-rated.
- Positive themes: Customers describe effective air cleaning and reductions in dust and odours.
- Positive themes: Customers appreciate quieter operation on the lowest setting and straightforward app connectivity.
- Positive themes: The feedback summary includes reports of allergy-related relief.

## Frequently asked questions

### What coverage does the Levoit Core400S claim?
The listing gives 180m² in the title and 1787 Square Feet in the specifications, while feature text describes different room sizes and cleaning times. These claims do not align clearly, so verify the appropriate coverage for your room before buying.
### Is the 24 dB noise figure for every setting?
No. The listing associates 24 dB with quiet sleep mode. It does not establish that the purifier makes that level of noise in other modes.
### Does it adjust fan speed automatically?
The listing says its PM2.5 sensor detects airborne particles and Auto Mode adjusts fan speed in response.
### Does it need to be plugged in?
Yes. The listed power configuration is Corded Electric.

## Alternative options

- [Levoit HEPA Air Purifier for Bedroom Home, CADR 187m³/h, 80m² \| Ultra Efficient HEPA and Quiet for Several Needs like Pet/Toxin/Mould, Removes 99.97% Pollen/Dust/Odour, Core 300](https://bargainpostbox.co.uk/visit/levoit-core400s-smart-hepa-air-purifier)
- [Blueair Blue Max 3250i Smart WiFi Air Purifier, HEPASilent Combination Filter Up To 48m² Rooms Removes 99.97% Pollen, Dust, Mould, Bacteria, Viruses \| Activated Carbon Reduces VOCs, Odours](https://bargainpostbox.co.uk/visit/levoit-core400s-smart-hepa-air-purifier)
- [Levoit HEPA Air Purifier for Bedroom Home, Quiet Sleep Mode \| Fragrance Sponge, Quiet Night Operation, Removes Common Air Pollutants, Ideal for Bedrooms & Small Rooms](https://bargainpostbox.co.uk/visit/levoit-core400s-smart-hepa-air-purifier)
- [Philips Air Purifier 900 Series, HEPA NanoProtect + Active Carbon, 65m² \| CADR 250m³/h clean air – intelligent, quiet and energy efficient purifier for allergy sufferers \(AC0950/10\)](https://bargainpostbox.co.uk/visit/levoit-core400s-smart-hepa-air-purifier)
- [Philips Air Purifier 2200 Series, HEPA NanoProtect + Active Carbon, 109m² \| CADR 420m³/h clean air – ultra-quiet, intelligent purifier with long-lasting filter for allergies \(AC2220/10\)](https://bargainpostbox.co.uk/visit/levoit-core400s-smart-hepa-air-purifier)
- [Blueair Blue Max 3450i Smart WiFi Air Purifier Alexa Enabled,HEPASilent Combination Filter Up To 103m² Rooms Removes 99.97% Pollen,Dust,Mould,Bacteria, Viruses,Activated Carbon Reduces VOCs,Odours](https://bargainpostbox.co.uk/visit/levoit-core400s-smart-hepa-air-purifier)
- [Philips Air Purifier 600 Series, HEPA, Covers 44m², App Control, White \| Removes 99.97% pollutants – ideal for allergy sufferers, smart sensor, energy efficient \(AC0651/10\)](https://bargainpostbox.co.uk/visit/levoit-core400s-smart-hepa-air-purifier)
- [Levoit Eleva 300X Air Purifier, PM1.0/2.5/10, 2-Year HEPA, Allergy Defence \| ECARF Certified, 273m³/h, 3-Stage HEPA Filtration, 99.97% Dust & Pollen Capture, Carbon Odour Filter, 19dB Sleep, AI Insight](https://bargainpostbox.co.uk/visit/levoit-core400s-smart-hepa-air-purifier)
- [DREO Smart Air Purifier for Homes with Pets, 19dB Quiet Sleep Mode, Washable Pre-filter, Large Rooms up to 204 m² Coverage at 1 ACH, Cleaner & Frenshener, PM2.5 Sensor, WiFi, Alexa, Hair, Dust, Odours](https://bargainpostbox.co.uk/visit/levoit-core400s-smart-hepa-air-purifier)
- [Bosch Dry 1000, Dehumidifier, For 17 m², 10L/24h \| Simple, Efficient, Ideal for Your Home & Quick Drying of Your Laundry, 10L/24h, Whisper-quiet only 34 dBA](https://bargainpostbox.co.uk/visit/levoit-core400s-smart-hepa-air-purifier)
- [MOOKA Air Purifier for Home Bedroom Covers 2200 Ft², H13 HEPA Air Cleaner \| Washable Pre-filter, Air Quality Monitor, Air Purifiers for Pets Hair Smoke Dust Pollen, Auto Mode, KJ190H White](https://bargainpostbox.co.uk/visit/levoit-core400s-smart-hepa-air-purifier)
- [DREO Smart Air Purifier for Home & Bedroom, PM2.5 Display, 196 m³/h CADR \| 3 in 1 HEPA Filters in Sleep Mode, AHAM verified, Auto & Turbo Modes, Wi-Fi/Alexa, for Pollen, Dust, Smoke, Quiet, Black](https://bargainpostbox.co.uk/visit/dreo-dr-hap008s-smart-air-purifier)

## Add-ons

- [Levoit Smart HEPA Air Purifier for Bedroom Home, CADR 433m³/h, 180m² \| Alexa & APP, Air Quality Sensor with Auto Mode, Remove](https://bargainpostbox.co.uk/visit/levoit-core400s-smart-hepa-air-purifier)

## Images

![Levoit Core400S Smart HEPA Air Purifier — 1](https://bargainpostbox.co.uk/i/LDC9LTkSVURjab3AsZ7I_svYfTe0Z3UnZ0c5aVCUXhnQ0DacFmiPCJJ6r7YC8oILbDPxbRXyauIZyXAXaVVLqJFzEDn6RAVLBrzxqnIsayXfbbYn.jpg)

![Levoit Core400S Smart HEPA Air Purifier — 2](https://bargainpostbox.co.uk/i/o9ty3CgugQgqGvkTib-XOn8l3IcEe5IBf5KV-QMF1OW9O4gRwKv1tDzy9Ykq6GZHFz05tlMxAFO7frp4VI_xlandcac1j2zR6YpvYh9Tu7qTwcXuamOV9s12.jpg)

![Levoit Core400S Smart HEPA Air Purifier — 3](https://bargainpostbox.co.uk/i/MJgrg0YeKQ2ntNWbrFXxVARifs3IVc3bMJf8SSU4H4t0SiOCfK_GMQ03c1xOjdXF1z0uk4TG5XgxDA8x9694MFmbFLNwHn9HuFCWQ_U89igNdTFcQfC20ZAB.jpg)

![Levoit Core400S Smart HEPA Air Purifier — 4](https://bargainpostbox.co.uk/i/KBuhaRl32WiGyMGIx6YfX8uaWMCmBe0bsUlqNzCOQJSb8jdeE5PPvs2a9-75UrCyAJzbpopCc2r_BzbbP8RxQgyOMxwDte1zYKnQNJfQtCm2uUsn9V9kB7wX.jpg)

![Levoit Core400S Smart HEPA Air Purifier — 5](https://bargainpostbox.co.uk/i/Y-jefuT7HSV8vYRVb0ZSEqH7TKzqpXnjTxzQLg5j8wQwL-7qTw-uN61T7jQBClh5HVzM1-UO9uVyo9VlUB0oy_jW6jK-6ARA0GaTFjEkjIAqTZLFDwfdYaE_.jpg)

![Levoit Core400S Smart HEPA Air Purifier — 6](https://bargainpostbox.co.uk/i/5PnbK9kN7Xvat0k5qIJOw5Z_ZZ-CkSHXFu8jEc1_XYl6IrFrJ62kBQa1mzFWcCreqbpmszD6hARTMdTabORBOGkqeraOHb8XcFCr_nRljOjnwdpPMCLSMQJr.jpg)

![Levoit Core400S Smart HEPA Air Purifier — 7](https://bargainpostbox.co.uk/i/mnwlNWB3CzvPuG0iz3yQiEppuHAM-Wf06vx9Z4eT8vSQx3uUgchry_AJfDvDTxWujmke6xQOxyxyeGmUDzkOFUqjOfRUhRlDyzVuLfH_J68aosJcmd8TYlLE.jpg)