Xiaomi Smart Air Purifier 4 Compact
(21 reviews)
Compact and nearly silent (20 dB in sleep mode), it traps 99.97% of particles down to 0.3 microns with a 3-in-1 filter certified TÜV Rheinland Allergy Care.
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Key features
- Coverage area: 16 to 27 m² (up to 48 m² for upkeep)
- Purified air flow (CADR): 230 m³/h
- Noise level: 20 dB in sleep mode
- Certified TÜV Rheinland Allergy Care against allergens
In detail: Xiaomi Smart Air Purifier 4 Compact, HEPA and activated carbon filter
With the Smart Air Purifier 4 Compact, Xiaomi delivers the most accessible entry point into its family of connected air purifiers, without cutting corners on the essentials: a genuine high-efficiency filter, a full-featured app and a shape that fits almost anywhere, from a child's bedroom to a home office. Its white cylindrical body, 35.5 cm tall with a 22 cm diameter, weighs barely 2.2 kg and sits comfortably on the floor, a bedside table or a console.
At its core, a 3-in-1 filter combines a pre-filter, an electrostatically charged high-efficiency filter and a layer of activated carbon: together they capture 99.97% of particles down to 0.3 microns, up to 99.99% for particles as small as 0.1 microns, whether pollen, dust, pet dander, smoke or cooking odours. TÜV Rheinland Allergy Care certification backs up its real-world effectiveness against allergens, a genuine selling point for households dealing with hay fever or dust mites.
On performance, purified air flow reaches 230 m³/h (particle CADR), for an effectively treated area of 16 to 27 m², and up to 48 m² for light air upkeep. Auto mode relies on a particle sensor that adjusts fan speed on its own, with instant visual feedback through a four-colour light. In sleep mode, noise drops to just 20 dB, barely more than a whisper, while maximum speed tops out at 60 dB(A). Power draw stays modest too: 27 W at most, around 0.7 kWh for 24 hours of continuous purification.
Control runs through the Xiaomi Home app, with timer, child lock and real-time air quality tracking, or by voice via Google Assistant and Amazon Alexa. Replacing the filter, recommended every 6 to 12 months, takes a single motion: twist the base to pull out the cartridge. Its main limitation lies in its compact size: beyond 25 to 30 m², a more powerful model is a better fit, or it should be left running continuously. For a room of reasonable size, the Smart Air Purifier 4 Compact remains one of the strongest value propositions on the market.
Technical data
Detailed characteristics
Additional information
| Model | BHR5860EU (AC-M18-SC) |
|---|---|
| Colour | White |
| Dimensions | Ø220 x 355 mm |
| Weight | 2.2 kg |
| Recommended coverage | 16 to 27 m² for effective use, up to 48 m² for light upkeep |
| Purified air flow (particle CADR) | 230 m³/h |
| Formaldehyde CADR | 76 m³/h |
| Filtration | 3-in-1 filter: pre-filter, electrostatic high-efficiency filter and activated carbon, 99.97% of particles down to 0.3 microns (up to 99.99% at 0.1 microns) |
| Certification | TÜV Rheinland Allergy Care |
| Noise level | 20 dB in sleep mode up to 60 dB(A) at maximum speed |
| Power consumption | 27 W maximum, about 0.7 kWh for 24h of purification |
| Motor | Brushless DC motor |
| Connectivity | Wi-Fi, Xiaomi Home app, compatible with Google Assistant and Amazon Alexa |
| Display | 4-colour air quality light indicator and touch controls |
| Modes | Auto, Night, Manual, timer, child lock |
| Power source | Mains, corded electric, 230V |
| Filter lifespan | 6 to 12 months depending on use |
| Manufacturer warranty | 2 years in Europe |
Comparison
In the £70 to £130 range, the Xiaomi Smart Air Purifier 4 Compact regularly comes up against the Levoit Core 300S and the Philips Series 600i AC0650/10, two other compact purifiers widely searched for a bedroom or small living room, in comparisons like "Xiaomi Air Purifier 4 Compact vs Levoit Core 300S". Here is how the three compare, based on each manufacturer's published specifications (for guidance only).
| Criterion | Xiaomi 4 Compact | Levoit Core 300S | Philips Series 600i AC0650/10 |
|---|---|---|---|
| Coverage area | 16 to 27 m² (up to 48 m² for upkeep) | Up to 50 m² | Up to 44 m² |
| Air flow (CADR) | 230 m³/h | 240 m³/h | 170 m³/h |
| Filtration | HEPA and activated carbon (3-in-1) | HEPA H13 and activated carbon (3 stages) | Electrostatic HEPA NanoProtect |
| Noise level (night/sleep) | 20 dB | 22 dB | 19 dB |
| Connectivity | Wi-Fi, Xiaomi Home app | Wi-Fi, VeSync app, Alexa and Google Assistant | WiFi, Philips Air+ app |
| Typical price | ≈£70 | ≈£150 | ≈£100 |
The Levoit Core 300S offers a slightly higher air flow and a genuine real-time air quality sensor, but at a noticeably higher price. The Philips Series 600i covers a larger area and stays very quiet, without matching the Xiaomi's CADR or offering a dedicated activated carbon layer for odours. Under £75, the Smart Air Purifier 4 Compact remains one of the best air-flow-to-price ratios in the segment, with TÜV Rheinland Allergy Care certification as a bonus.
Related video
Video: Xiaomi Smart Air Purifier 4 Compact - Trusted Review (+ Smoke Test) - Published on 17 October 2022
Our tester's verdict: Christophe Delpuech
I ran the Smart Air Purifier 4 Compact in a 14 m² bedroom, and it faded into the background from the first night: in auto mode it stays close to inaudible and adjusts its own fan speed based on the measured air quality, shown at a glance through the 4-colour light on top. What surprised me most was how quickly it reacts: a few minutes after striking a match right in front of the intake, the light dropped back from red to green. Changing the filter, recommended every 6 to 12 months, is genuinely simple: twist the base and pull out the whole cartridge, no loose foam or carbon to handle. Two honest gripes: the power button stays faintly lit even in night mode, a small piece of tape sorts that out, and in a room of 25 m² or more, it is better run continuously than relied on for short bursts. For a bedroom, home office or small living space, this is a serious little machine, easy to live with day to day and light on the electricity bill.
Frequently asked questions: Xiaomi Smart Air Purifier 4 Compact, HEPA and activated carbon filter
The manufacturer states an effectively treated area of 16 to 27 m² for optimal air renewal, and up to 48 m² for light upkeep with a gentler air renewal rate. For a standard bedroom or home office, it is well sized.
No: in sleep mode it drops to 20 dB, barely audible, comparable to rustling leaves. At maximum speed it can reach up to 60 dB(A), a setting best kept for occasional bursts rather than continuous use.
Xiaomi recommends replacing the 3-in-1 filter every 6 to 12 months depending on use and ambient air quality. The Xiaomi Home app shows a wear indicator and warns when a replacement is needed.
Yes, the touch controls on the unit let you change mode or speed without a smartphone. The app adds remote control, timer, child lock and detailed air quality tracking.
Yes, thanks to its activated carbon layer built into the 3-in-1 filter, alongside the high-efficiency filter that captures 99.97% of particles down to 0.3 microns. Cooking or smoke odours are noticeably reduced, alongside dust and pollen.
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Page published on 4 August 2026