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HomeHealth & WellbeingLevoit Core 400S Review: Effective Air Purifier for Allergies and Clean Air

Levoit Core 400S Review: Effective Air Purifier for Allergies and Clean Air

A modern family room with a Levoit Smart Air Purifier
Levoit Smart air purifier cleaning the air in a living room

In today's health-conscious world, keeping a clean and safe indoor environment is essential. Among many options available, the Levoit Smart True HEPA Air Purifier is a standout for its efficient performance, smart features, and user-friendliness. This review explores the various aspects of this air purifier, evaluating its connectivity, performance, and overall value against its competitors.

>> Guide to connecting the Levoit Air Purifier to your Smart Home Apps

Levoit Core 400S Smart True HEPA Filter Review: Personal Experience (Improved Work Productivity)

During the pandemic lockdown, I worked from home. Following the lockdown, my transition to a home office then became permanent. I noticed that the quality of air in my office had a significant impact on my productivity and comfort levels. While I live on the coast near the countryside and enjoy the fresh air, I suffer from allergies caused by the surrounding trees. Fortunately, I found a solution in the Levoit air purifier, which effectively purifies the air and reduces my allergic reactions.

The Levoit air purifier 400S has significantly reduced the severity of my allergy symptoms by around 65%, making my workspace much more comfortable and productive. I have the device connected to Google Home smart set-up and it runs as a scheduled routine within the Home app.

Combatting Allergies with Advanced Filtration

The effectiveness of an air purifier is its ability to create a healthier living space, particularly for those of us dealing with allergies. The Levoit Smart True HEPA Air Purifier excels in this area thanks to its sophisticated filtration system that captures 99.97% of airborne particles, including pollen, dust, and other allergens. This capability has been a game-changer in my home office, enhancing both my comfort and work efficiency by ensuring the air I breathe is almost particle-free.

Features and Benefits of Levoit Smart Air True HEPA Air Purifier

The LEVOIT Smart True HEPA Air Purifier is equipped with a 3-stage Filtration system, which I found quite effective in capturing airborne particles, mould, bacteria, and viruses. The VortexAir™ Technology significantly increases indoor air circulation and filtration efficiency, making a noticeable difference in air quality. During my use, the AirSight™ Plus Technology, with its laser dust sensor, impressed me by scanning the surrounding air for airborne particles and displaying the findings on the PM2.5 Display. This feature allowed me to visually monitor the air quality and see the purifier's impact in real-time.

Best air purifier for removing cooking odours

Another standout feature is the ARC Formula™, which efficiently neutralises household odours from cooking oils and general food smells. This also can be easily remedied by placing the Levoit 400S in the kitchen after you have finished cooking. If your budget stretches then either add another of the same purifier or a smaller Levoit Core 300S as a permanent addition to the kitchen.

Noise Levels Explained

Working remotely I did not want to be disturbed by noise and found that Levoits QuietKEAP™ Technology is very good at keeping noise levels to a minimum. When it detects poor (air quality) on auto mode, it will suddenly get louder, not obnoxiously but more of a wind-blowing fan-like sound. The Levoit Core 400S is a quiet purifier for the bedroom, especially when in ‘Sleep Mode’.

  • Sleep Mode: Engineered for whisper-quiet operation, the purifier operates at a barely audible level of around 24 dB. This ensures your sleep or any noise-sensitive activities remain undisturbed, providing a serene environment.
  • Auto Mode: In this mode, the purifier automatically adjusts its fan speed based on the air quality. Noise levels can vary from 24 dB in low pollution conditions to approximately 52 dB during high pollution scenarios, similar to a high-speed fan.

VeSync App

The VeSync app is important for setting up smart features and integrating them with your smart home ecosystem. We have written a step-by-step guide to setting up the Levoit Air purifier with smart home apps.

VeSync App Features and Functionality

  • The VeSync app added a layer of convenience with intuitive features like scheduling, real-time air quality monitoring, and filter life tracking. This allows for effortless management of your indoor air quality, ensuring optimal performance without constant manual adjustments.

Voice Control Integration

  • The VeSync app seamlessly integrates the Levoit air purifier with smart home assistants such as Alexa and Google Assistant via the app. This enables voice-activated commands for turning the device on/off, adjusting settings, and checking air quality levels, offering convenience and hands-free control.

My Pros and Cons


  • 3-Stage Filtration System: Captures 99.97% of particles down to 0.3 microns, significantly improving air quality and aiding those with allergies.
  • QuietKEAP Technology: Operates at a whisper-quiet 24 dB in sleep mode, ensuring your rest or work isn't disturbed by noise.
  • Smart Features with VeSync: Offers scheduling and real-time air quality monitoring, allowing for easy management and tailored air purification routines.
  • Voice Control Integration: Compatible with Alexa and Google Assistant for convenient, hands-free control over your air purifier's settings.


  • Sensor Sensitivity: Some users find the sensors less responsive to specific particles, like dust or pet dander, which can delay the purifier's automatic adjustments.
    • Solution: Regular cleaning of the sensors can improve their accuracy. Manually adjusting settings during known activities that affect air quality (e.g., cooking, vacuuming) ensures consistent comfort.

Comparing Levoit to Its Competitors

When comparing Levoit to other air purifiers like the Dyson Pure Cool, Honeywell HPA300, and Philips Series 2000, several factors come into play, including quality, features, and price.

Dyson Pure Cool: Known for its sleek design and dual function as an air purifier and cooler. While the Dyson Pure Cool performance is top-notch, the price can be prohibitive for some.

Honeywell HPA710: Offers powerful air purification but lacks the smart features and quiet operation that Levoit boasts. The Honeywell Premium Air Purifier's sensor detects and removes dust and pollen.

Philips Series 1000i: Similar in filtration effectiveness but falls short in smart technology and user interface, areas where Levoit excels. The Philips 1000i Air Purifier uses a HEPA filter and is very quiet.

Levoit's standout feature is its smart technology, offering intuitive app control, smart home voice control and real-time air quality monitoring—features that are less accessible in models like the Honeywell HPA300. This blend of performance and convenience, at a competitive price, positions Levoit as a good choice when considering an air purifier.

Efficient Air Filtration: Replacing and Extending Your HEPA Filter’s Life

One of the standout features of the Levoit air purifier is its True HEPA filter, renowned for its ability to trap 99.97% of particles as small as 0.3 microns. This includes a wide range of allergens, dust, and pollutants, ensuring the air in your space remains clean and healthy. Typically, the filter should be replaced every 6 to 8 months, depending on usage and air quality.

HEPA Filters Hack for Extended Life

To extend the lifespan of your HEPA filter, one hack is to vacuum it gently every couple of months to remove surface dust and debris, although it's important to follow the manufacturer's guidelines to avoid damage.

What is the cost of replacing a HEPA filter?

Depending on the model of your Levoit Air Purifier, the cost of a replacement filter varies slightly by model but generally falls in the range of £25 to £60 in the UK, or approximately $30 to $62 in the US. Investing in genuine Levoit replacement filters ensures your air purifier continues to operate at its best, providing optimal air quality in your home or office.

How much does the Levoit 400s cost?

Price-wise, Levoit strikes a balance between offering advanced features and maintaining affordability. While Dyson's model may appeal to those seeking cutting-edge technology, its high cost can be a deterrent. On the other hand, the Honeywell HPA300, though budget-friendly, lacks the smart features and aesthetic appeal that Levoit boasts. Philips Series 2000, while technologically comparable, often does not match Levoit's value proposition when considering smart features and user-friendly design.

Where To Buy The Levoit Smart Air Purifier

If you are in the UK and want to purchase one of the Levoit Core Series of Smart air purifiers, then currently Amazon is the place to buy one. They have several from the range and a current deal on the Levoit 400S. We will add more links to other merchants in the US and UK when they become available.

Who Should Consider the Levoit Smart True HEPA Air Purifier?

The Levoit Smart True HEPA Air Purifier is highly recommended for a broad range of individuals, particularly those who value their health and comfort in their living spaces. It is an excellent choice for:

  • Allergy Sufferers: For anyone battling seasonal allergies or sensitivities to dust and pet dander, this air purifier can significantly reduce allergens in your home, providing much-needed relief.
  • Pet Owners: Pet lovers will find this air purifier for allergies and pet dander effective in capturing pet hair, and odours, keeping the air fresh and clean.
  • Families with Children: Ensuring a clean air environment is crucial for young, developing lungs; this purifier is perfect for children and helps protect against pollutants that can affect your child’s health.
  • Remote Workers: Individuals working from home will appreciate the purifier's ability to maintain a clean and healthy air environment, potentially boosting focus and productivity.
  • Health-Conscious Individuals: Anyone prioritising a healthy lifestyle will find the purifier's ability to remove pollutants and improve air quality aligns perfectly with their goals.

How to set up a Levoit air purifier with your smart home ecosystem

Personal Reflections and Recommendations

The Levoit air purifier will be a significant addition to your home or apartment, particularly in managing seasonal allergies, and for city dwellers wanting to manage fumes and air pollution. Its performance, coupled with user-friendly features, positions it as a top choice for those seeking efficient and convenient air purification solutions. Whether you're dealing with allergies, looking to improve indoor air quality, looking for an air purifier for your home office, or simply want a smarter way to keep your living space fresh, the Levoit air purifier is worth considering. Based on my experience and comparison with other products in the market, it delivers on its promises and offers great value for the investment.

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