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 covers scheduling, filters, and diagnostics, and the device itself is sleek, fast, and efficient."
Ideal for these searches
This model is a strong match if you are looking for: best air purifier for your situation, room size, or concern in the UK.
- xiaomi air purifier 4 review uk
- best smart air purifier under £150 uk
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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
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Consider These Alternatives
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square_foot41 m²
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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
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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
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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: 01 Apr 2026Availability Checked: 01 Apr 2026