Levoit Core 400S Air Purifiers for Large Home Bedroom 166m² vs Coway BK Air Purifier for Home Bedroom

By the Clean Air Lab editorial team · Updated 2026 · How we test & score

We compare the Levoit Core 400S Air Purifiers for Large Home Bedroom 166m² and the Coway BK Air Purifier for Home Bedroom across every dimension that matters - our scores, the key specs, and how each performs on the things you will actually notice day to day.

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At a glance

Levoit Core 400S Air Purifiers for Large Home Bedroom 166m²Coway BK Air Purifier for Home Bedroom
Our score9/109.2/10
Best forMedium to large rooms up to 166 m²Medium to large rooms up to 109 m² with allergy, dust and odour concerns
Not ideal forBuyers on the tightest budgetBuyers on the tightest budget
BrandLevoitCoway

Design and Build Quality

Levoit Core 400S Air Purifiers for Large Home Bedroom 166m²

This air purifier's Core 400S uses a compact, rectangular tower design in Snow White, with overall dimensions of 27.4D x 27.4W x 51.9H cm and a weight of 5.8 kg, so it can fit most living rooms, offices, or bedrooms without looking overly bulky. In Levoit Core 400S air purifiers for large home bedroom 166m² UK setups, the build feels solid for everyday use, with a stable base and clean, simple surfaces that are easy to wipe. The external finish appears uniform and low-profile.

Coway BK Air Purifier for Home Bedroom

This air purifier's Mighty Black AP-1512HH BK is designed for everyday home use, with a compact footprint and a tall form factor intended to suit bedrooms and living rooms. The Coway review features a simple, matte "Mighty Black" look with touch controls on the front panel. At 9.6D x 25.1W x 46.6H cm and around 5.6 kg, it is portable enough to move while remaining sturdy for daily handling. The build feels durable, and a 3-year warranty is included.

CADR and Room Coverage

Levoit Core 400S Air Purifiers for Large Home Bedroom 166m²

Even when the Core 400S looks compact and well-finished, performance remains the deciding factor, particularly for CADR-related expectations and how quickly it refreshes air across a home. The Levoit states it can clean a 166 m² room about once per hour, or an 83 m² room about twice per hour, with 360-degree air intake from living areas into bedrooms, offices and kitchens. This coverage aligns with large home bedroom scenarios, but the actual refresh speed depends on room layout and airflow. For buyers considering the air purifier for a large home bedroom 166 m² price, CADR figures should be treated as guidance rather than a guarantee.

Coway BK Air Purifier for Home Bedroom

CADR (Clean Air Delivery Rate) and room coverage indicate how quickly the air purifier can clean indoor air, based on the manufacturer's published performance targets. The manufacturer states a CADR of 421 m³/h and claims it is designed for rooms up to 109 m², or for cleaning 43 m² in as little as 15 minutes. This supports the idea of quick air turnover for typical bedrooms, though actual results can vary with room layout and pollution load. The unit is positioned for home use in bedrooms, living rooms, and offices.

HEPA Filtration Performance

Levoit Core 400S Air Purifiers for Large Home Bedroom 166m²

HEPA filtration is the main reason the Levoit is built to handle everyday airborne particles, as its 3-stage HEPA filter is designed to capture particulate matter down to 0.3 microns. This matters for dust, fur, lint and hair, since smaller particles stay suspended longer. It also includes a PM2.5 intelligent air quality sensor, the AirSight Plus laser dust sensor, so the purifier can read current fine-particle levels and adjust filtration accordingly. Its HEPA focus does not automatically remove gases, and performance depends on the airflow setup.

Coway BK Air Purifier for Home Bedroom

Beyond how fast a purifier clears air, its HEPA filtration performance determines how small particles it can capture. The Coway air purifier, model AP-1512HH BK, uses a HyperCaptive HEPA system rated to capture particles down to 0.01 um, and it claims 99.999% removal of ultrafine particles. The filtration is intended to target dust, pollen, smoke and VOCs, and the filter media is described as being designed to handle a wide mix of indoor allergens. Real-world results depend on how often the purifier runs and the amount of contaminated air entering the room.

Noise Level and Sleep Mode

Levoit Core 400S Air Purifiers for Large Home Bedroom 166m²

The Core 400S is rated at 24 dB(A), which is a relatively quiet level for an air purifier during normal operation, and it includes a sleep mode for nighttime use. For a large home bedroom of 166m², this matters because steady airflow can be noticeable. In sleep mode, the fan runs more gently, which should help keep the room comfortable while the unit filters air. The Levoit Core 400S air purifier for a large home bedroom of 166m² offers quieter nights, but it may take longer to clear heavier pollution than operating at higher fan speeds.

Coway BK Air Purifier for Home Bedroom

Noise levels matter most at night because the AP-1512HH BK is designed for use in bedrooms, living rooms and home offices. The sound experience depends on fan speed, since stronger cleaning typically uses higher settings. Touch controls allow the fan speed to be lowered for sleep, helping maintain quieter operation while continuing to filter air. If the purifier runs at a higher level for extended periods, it may be distracting for light sleepers. The quietness advantage is most evident when the room air remains clean and fan output can stay modest.

Smart Features and App Control

Levoit Core 400S Air Purifiers for Large Home Bedroom 166m²

Smart features and app control can make day-to-day use easier, particularly when the purifier is running while people are asleep or away. The Levoit Core 400S air purifier uses an intuitive app, enabling owners to adjust settings remotely during the time they are away from the device. The AirSight Plus sensor supports Auto mode, changing fan speed based on PM2.5 readings without manual steps. Voice control and smart home compatibility add further convenience. If connectivity is unstable, the unit still operates locally, although automation can feel less useful.

Coway BK Air Purifier for Home Bedroom

Although smart controls can be useful in everyday use, the air purifier's manufacturer information does not specify any phone app control or Wi-Fi connectivity. Buyers using the Coway AP-1512HH BK air purifier in a home bedroom should expect control to be handled directly on the unit. The purifier includes touch controls, and features like Smart Eco Mode automatically adjust fan speed based on indoor air quality, while it pauses when the air stays clean. An optional ioniser can be switched on or off. Overall, smart functionality is limited to onboard automation.

Filter Life and Cost

Levoit Core 400S Air Purifiers for Large Home Bedroom 166m²

Because the Levoit uses a 3-stage HEPA filter to capture particles down to 0.3 microns, filter replacement affects both performance and overall running costs. For buyers comparing the air purifier with other options for a large home bedroom of 166 m², budgeting requires checking retailer listings for the relevant filter SKUs and current costs. The AirSight Plus sensor can adjust fan speed automatically, which may reduce filter strain when air is cleaner. Even so, without stated schedules from the manufacturer, replacement timing remains unclear.

Coway BK Air Purifier for Home Bedroom

Filter life depends on usage, and The Coway states the HEPA filter can last up to 12 months before replacement is needed, although the exact timing varies depending on how often the purifier runs and how dirty the air is. For the Coway AP-1512HH BK air purifier for a home bedroom, fewer replacements can be a practical cost benefit when it runs steadily on moderate settings. Heavy smoke, cooking fumes and high pollen seasons can shorten filter life, which increases maintenance. The model's HEPA system is designed to capture particles to 0.01 Micron, but real-world filter cost depends on local air quality rather than room size alone.

Energy Use

Levoit Core 400S Air Purifiers for Large Home Bedroom 166m²

With an operating power draw of 24 watts, the Levoit is designed to clean large spaces while staying in a relatively modest consumption range for an air purifier rated for up to 166 m² (covers 166 m² once per hour, or 83 m² twice per hour). For Levoit Core 400S air purifiers for large home bedroom use at 166 m², fan speed is the key driver of energy cost, since Auto Mode can raise or lower power based on PM2.5 readings. In sleep mode, it should draw less. Overall energy use is predictable at 24 W.

Coway BK Air Purifier for Home Bedroom

Energy use is a key factor when running the Coway air purifier in a bedroom, because it affects daily running cost and how long the unit can be kept on without interruption. This model includes Eco mode that automatically adjusts fan speed based on indoor air quality, and it can pause when air remains clean, which may reduce power use during stable conditions. Fan behaviour can also be influenced by the ioniser setting, since it can be switched on or off.

Cleaning and Maintenance

Levoit Core 400S Air Purifiers for Large Home Bedroom 166m²

Cleaning and maintenance for the air purifier focuses on careful filter handling, upkeep of the AirSight Plus sensor, and basic cleaning around the air intake area. The HEPA filter should be handled gently, and replacement timing should follow the manual. The AirSight Plus sensor requires light cleaning to reduce dust build-up that can affect readings, and it should be wiped carefully with a dry, soft cloth. It is also advisable to vacuum around the 360° intake and keep the vents clear. After cleaning, the unit should be restarted to resume normal airflow.

Coway BK Air Purifier for Home Bedroom

Cleaning and maintenance help keep the air purifier working well over time, and they also influence how often filter changes are needed. For day-to-day care, wipe the outer casing with a dry or lightly damp cloth, and gently remove dust from around the vents. Check the pre-filter area, if present, regularly because buildup can slow airflow. When the HEPA filters reach the end of their usable life, replacements should be planned, with the manufacturer stating up to 12 months depending on usage. If the optional ioniser is used, filter load may rise, so monitoring matters.

Who Is This Air Purifier For?

Levoit Core 400S Air Purifiers for Large Home Bedroom 166m²

This air purifier is a good fit for people who want an air purifier designed for large rooms, using automatic fan control. It suits households looking for levoit core 400s air purifiers for a large home bedroom up to 166m², with a 360° intake for living rooms, offices, kitchens, and bedrooms. It is also suitable for those who want basic smart control, as it is compatible with voice commands and an app. It targets particles down to 0.3 microns, so it is mainly about monitoring air quality via PM2.5.

Coway BK Air Purifier for Home Bedroom

This air purifier is a good fit for households that need fast air cleaning in larger rooms, as the manufacturer states it can refresh up to 109 m² and clean 43 m² in as little as 15 minutes. It suits spaces such as a bedroom, living room, or home office. This is a home bedroom air purifier designed for HEPA filtration of particles down to 0.01 um, with coverage beyond a single small space. Allergy sufferers may benefit because it is certified by BAF and ECARF. Busy homes should like the quicker refresh cycles, although suitability will depend on room layout and usage.

Levoit Core 400S Air Purifiers for Large Home Bedroom 166m²: pros

  • Rated for rooms up to 166 m²
  • HEPA filtration
  • Quiet operation (24 dB(A))
  • Smart-home and app control (Smart Home Compatible)
  • Independently certified (CE, RoHS)

Cons

  • Filter replacement intervals not stated by the manufacturer

Coway BK Air Purifier for Home Bedroom: pros

  • Rated for rooms up to 109 m²
  • HEPA filtration capturing 99.999% down to 0.01 Micron

Cons

  • Filter replacement intervals not stated by the manufacturer

Our verdict

Our pick is the Coway BK Air Purifier for Home Bedroom (our score 9.2/10) - A capable multi-stage air purifier with solid filtration, capturing 99.999% down to 0.01 Micron, held back mainly by a few practical limitations. The Levoit Core 400S Air Purifiers for Large Home Bedroom 166m² is still worth it if it is cheaper when you check, or if it better matches your specific needs.