Quick verdict
The Xiaomi Smart Air Purifier 4 offers a solid combination of air purification performance and Home Assistant integration. Once you extract the device token, it runs locally with full control over fan speed, modes, and sensor readings. The token extraction step is the main hurdle, but it is well-documented in the community.
Standout: Local Home Assistant control via Xiaomi Miio integration with built-in PM2.5, temperature, and humidity sensors.
Last checked: 2026-03-25