Xiaomi 4
speedQuietnessExceptional
ecoEfficiencyUK Rated
Tech Pick
star4.7
Xiaomi Smart Air Purifier 4
9Our Score
Clean Performance Index
Based on CADR, noise-to-power ratio, and filter longevity.
verified_user
Our Verdict
"Hard to beat for tech lovers. The Xiaomi app is comprehensive, and the device itself is sleek, fast, and efficient."
How We Tested This Model
- check_circleCADR and coverage parsed against UK room-size assumptions.
- check_circleNoise and power values normalized for side-by-side comparisons.
- check_circlePrice and availability signals refreshed monthly.
thumb_up Pros
- checkGreat OLED touch display
- checkHigh CADR for price
- checkNegative ion generator
thumb_down Cons
- closeFilter life tracking can be buggy
- closeProprietary power cable
Consider These Alternatives
Levoit Core 300S Smart Air Purifier
£149.99Best Seller
"The 300S is the default recommendation for most UK bedrooms and living rooms. It balances price, performance, and smart features perfectly."
square_foot41 m²
volume_up- dB
Fit Score0%
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Levoit Core 400S Smart True HEPA Air Purifier
£189.99Editor's Choice
"The Core 400S is the gold standard for mid-sized rooms, offering quiet operation and excellent smart features at a price that beats high-end competitors."
square_foot83 m²
volume_up- dB
Fit Score0%
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Levoit Core 200S Smart Air Purifier
£99.99Compact
"A brilliant entry-level smart purifier. While it lacks the raw power of the 300S, it is perfect for small bedrooms and home offices."
square_foot35 m²
volume_up- dB
Fit Score0%
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Levoit Core Mini Air Purifier
£49.99Desktop
"Cute and capable for a desktop, but do not expect it to clean a whole room. The aromatherapy pad is a nice touch."
square_foot17 m²
volume_up- dB
Fit Score0%
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Technical Specifications
square_footCoverage48 m²
airCADR Speed400 m³/h
volume_upMax Noise32–64 dB
filter_listFiltration3-in-1 HEPA
paymentsFilter Cost£39 / 6-12mo
smartphoneSmart AppYes
verifiedWarranty2 Years
boltPower30W
£139Typical Price
Check Price on Amazonopen_in_newPrice Checked: 25 Feb 2026Availability Checked: 25 Feb 2026