Xiaomi Smart Air Purifier 4 Pro

Quick verdict

500 m3/h CADR covering up to 60 m2 with an OLED display, controllable fully locally over the miot protocol once the device token is extracted. The xiaomi_miio integration talks directly to the unit over the LAN using the miot protocol, so day-to-day control never touches the cloud. Just note: Requires extracting the device token (one-time Xiaomi cloud login).

Standout: 500 m3/h CADR covering up to 60 m2 with an OLED display, controllable fully locally over the miot protocol once the device token is extracted.

Last checked: 2026-06-02

Compatibility snapshot

Why it stands out

• After token setup, control and sensor polling is local LAN with no cloud round-trip
• High 500 m3/h CADR and large coverage for the price
• Native HA xiaomi_miio integration exposes fan modes, PM2.5 and filter life

Reasons to hesitate

• Requires extracting the device token (one-time Xiaomi cloud login)
• No Matter/Thread; depends on the community miio stack
• US availability is largely via importers

Best for

• HA users wanting local purifier control on a budget
• Medium-to-large rooms

Avoid if

Privacy and local-control notes

The xiaomi_miio integration talks directly to the unit over the LAN using the miot protocol, so day-to-day control never touches the cloud.

Home Assistant support: supported · integration path: Xiaomi Miio (xiaomi_miio).

Buying reality check

Price notes: Around $280. Mid-range pricing.

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