Xiaomi

Smart Air Purifier Pro 4

Xiaomi Smart Air Purifier Pro 4

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Overall

#212 in

Air Purifiers

according to Reddit Icon Reddit

Sentiment score60% positive
3
1
1
Last updated: May 19, 2026

Reddit Reviews

Reddit Iconbbrnee50
6 months ago

I use the Smart Air 4 for small rooms and Smart Air 4 pro for big rooms. I think there might be a newer model out, and I always get the global version. Been using this brand for years.

Reddit Icongraynoize8
9 months ago

I added all my Xiaomi ones - 1st gen, 2nd gen and 4 Pro - to Apple Home via Homebridge. Kinda straightforward and expose data like temperature, humidity, air quality to Apple Home too.

Reddit IconLengthReasonable
4 months ago

I just bought the Xiaomi Air Purifier 4 Pro and it’s very good it has a higher CADR for bigger rooms, better sensors for the PM2.5 + PM10 detection and faster air cleaning from my research. The regular 4 still handles PM2.5 fine but is more suited to smaller rooms.

Reddit Iconsasakitomiya
4 months ago

Robo vacuumed, daily wipes, air purifier, humidifier (moister in the air to capture and drag down dust). Even closing windows 24/7 will not help cause by law apartments and homes must have a ventilation system that lets air flow and cannot be blocked. Look for a small square plastic panel near balcony entrance. I run Xiaomi Smart Air Purifier 4 Pro and have it run with my Home Assistant. It’s on almost 24/7.

Reddit IconTDYDave2
6 months ago

Looks interesting, but not as widely available as a Xiaomi. The Xiaomi 4 Pro and the Smartair SA-600 appear to have the most directly comparible CADR ratings (500 vs 508 claimed) Prices are from Lazada Xiaomi store or WEDO air, an official supplier of SmartAir in Thailand [SmartAir SA-600 Review](https://housefresh.com/smart-air-sa600-review/) Cost: 10900 [Xiaomi 4 Pro](https://housefresh.com/xiaomi-4-pro-review/) Cost 7010 SmartAir Replacement Filter cost (Requires 2X HEPA plus 2X Carbon) 990+890= 1880 Xiaomi Replacement Filter cost (1 HEPA, with built in Carbon filter) 1349 The SA-600 is fully manual, basically a box fan with a filter. The Xiaomi has an air quality meter and an auto mode.

Reddit Iconmdsmqlk
6 months ago

Depends. Earlier/cheaper models do give a lower AQI. Higher end models with laser sensors don't. My Xiaomi Pro purifier is much more accurate than my 3H was.

Reddit Iconajay_v1
6 months ago

I have cuckoo repsure without copper but if budget is 18k then go for mi ap4 It has app support and better in terms of feature. But if you compare in terms of cadr, cleaning performance then I would say cuckoo is 20 and mi is 19. In my opinion mi ap4 is better if you have 18k

Reddit Icondrivefloppy
6 months ago

I'm have the following purifiers for my family of 5. Phillips 2887 and 1215. Mi Purifiers 2, 3 and 4. Coway Airmega 150 and Qubo 1000C. Not sure about replacing filters every 3 months. We clean it once a fortnight or month depending on the pollution. Mi and Qubo give filter replacement alarms. They say 9000 hours to 15000 hours. So not sure how you came up with 3 months. 90 days x 24 hours is about 2k hours of filter use only. I've placed the Phillips 1215 in the kitchen to reduce pollution in the rest of the house. I didn't think much about Co2 but will see if I can monitor. I counter room cooling with a oil based heater since it doesn't alter the room humidity unlike convection based heaters.

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