Xiaomi Smart Air Purifier 4 Pro - 500 m3/ h Particle CADR

Xiaomi Smart Air Purifier 4 Pro is a floor-standing air cleaner identified as model AC-M15-SC. Its rated particle clean air delivery rate reaches 500 m3/h, placing it in the higher-output segment of Xiaomi's home air-purifier range.

Large Room Airflow

Xiaomi lists an effective coverage area of 35-60 m2. The same specification page gives the unit's formaldehyde CADR as 185 m3/h, separating gas-focused performance from the higher particle-CADR figure.

The purifier measures 275 x 275 x 680 mm and weighs approximately 6.8 kg. Its rated power is 50 W, while the listed maximum noise level is 65 dB(A), figures that describe the device's physical footprint and operating ceiling.

Sensors and Smart Controls

The AC-M15-SC uses PM2.5 and PM10 sensing to track particulate levels and includes an OLED display for readings and controls. Xiaomi also specifies 2.4 GHz Wi-Fi using IEEE 802.11 b/g/n, allowing the purifier to connect with the Xiaomi Home app.

The filter system combines mechanical filtration with activated carbon, while an ionizer supports particle capture. Xiaomi's published material describes clean-air output of up to 8,330 liters per minute, a value derived from the 500 m3/h particle-CADR rating.

Where It Fits

Compared with compact air purifiers designed for bedrooms or small offices, the 4 Pro is aimed at larger rooms because its stated coverage reaches 60 m2 and its particle CADR reaches 500 m3/h. The tradeoff is its 680 mm height and approximately 15 lb net weight, which make it less suited to frequent movement.

The model fits households that want app connectivity, visible air-quality readings, and a high airflow rating in one appliance. Its 50 W rated power, 65 dB(A) maximum noise level, and 2.4 GHz-only wireless specification are practical limits for placement, sound-sensitive rooms, and networks restricted to newer Wi-Fi bands.

Verdict for Larger Rooms

Xiaomi Smart Air Purifier 4 Pro is best placed as a connected, high-airflow purifier for rooms within the stated 35-60 m2 range. The combination of model-specific sensing, OLED controls, 500 m3/h particle CADR, and 185 m3/h formaldehyde CADR gives it a detailed specification set; buyers needing a smaller footprint or quieter maximum operation should compare those limits against the room and network requirements.