# Xiaomi Smart Air Purifier 4

- Page: https://bestatbest.com/de/en/air-purifiers/xiaomi-smart-air-purifier-4
- Not sold at any shop we monitor today, so not in our ranking.
- No verified price today.

## Our score

- Score 2.3 out of 10
- Owners’ ratings, 40%: none yet at the shops that deliver to Germany, so this part is left out and the score is the features part alone.
- Features, 60%: 2.3, 14 of the 60 points for the maker’s and the registers’ facts.
- Price does not count, so a discount never lifts a model. Only air purifiers with a known CADR are ranked.

## Frequently asked questions about the Xiaomi Smart Air Purifier 4

**What size of room is the Xiaomi Smart Air Purifier 4 for?**

The Xiaomi Smart Air Purifier 4 is sized for a room of about 33 m², the room size we compare it on. Its clean air delivery rate (CADR) is 400 m³/h, measured to GB/T 18801 (Chinese standard).

**How often does the Xiaomi Smart Air Purifier 4 need a new filter?**

The maker gives the filter a life of 6 months.

**How loud is the Xiaomi Smart Air Purifier 4?**

The maker states 32.1 dB at the lowest speed and 64 dB at the highest.


## The maker: Xiaomi

- Headquarters: China (https://www.hkexnews.hk/listedco/listconews/sehk/2026/0428/2026042800526.pdf, 2026-10-12)
- https://www.mi.com/de/
- Reviews on Trustpilot: https://www.trustpilot.com/review/mi.com

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