Xiaomi Smart Air Purifier 4 Compact

The Xiaomi Smart Air Purifier 4 Compact is built for bedrooms, home offices, and other smaller spaces, with a 230 m³/h particle CADR covering 16-27 m². Despite its small Φ220 x 355mm footprint, it uses the same three-stage filtration found in Xiaomi’s larger purifiers: a pre-filter, a TÜV Rheinland allergy-certified HEPA layer, and activated carbon, capturing 99.97% of particles down to 0.3 microns. An onboard PM sensor drives Auto Mode, ramping the fan up when it detects dust, smoke, or pollen and easing back once the air clears, while a four-color LED ring gives an instant visual read on current air quality without needing to open the app. Sleep Mode brings noise down to as low as 20 dB(A) and can dim the display entirely for a distraction-free bedroom. Setup and daily control run through the Xiaomi Home app over Wi-Fi, letting you schedule purification cycles, monitor filter life, and adjust settings remotely. At just 2.2kg, it’s light enough to move between rooms as needed. Space-Saving Design: Compact Φ220 x 355mm body suited to smaller rooms, 2.2kg. Allergy-Certified Filtration: 3-stage filter captures 99.97% of particles ≥0.3µm. Auto Mode: PM sensor automatically adjusts fan speed to real-time air quality. Quiet Sleep Mode: Noise as low as 20 dB(A) with dimmable display. Visual Air Quality Indicator: 4-color LED ring shows air status at a glance. App Control: Schedule and monitor remotely via the Xiaomi Home app. Specifications Particle CADR: 230 m³/h Coverage Area: 16-27 m² Filtration: 3-stage (pre-filter, HEPA, activated carbon), 99.97% at 0.3µm, TÜV Rheinland certified Noise: ≤60 dB(A), as low as 20 dB(A) in Sleep Mode Power: Rated 27W, adapter input 100-240V~ 50/60Hz Connectivity: Wi-Fi 802.11 b/g/n 2.4GHz, Xiaomi Home app Dimensions / Weight: Φ220 x 355mm, ~2.2kg