Xiaomi Air Purifier 4 Smart APP Control CADR Up to 400m3/h OLED Display, Purify Pollen and Reduce Harmful Particles, Antiviral Coating Filter, Eliminated Virus* Effective 24-48m2 Room Size

I bought this because my partner suffers from a pollen allergy. We think the unit has made a difference, but it's hard to tell for sure because this unit doesn't measure PM10 (pollin) sized particles. It only measures and responds to PM2 sized particles (urban pollution) - so when on auto, it always run at the lowest speed. There is also the Xiaomi PRO model, which does measure PM10 particles, but has a bit bigger footprint. I also considered the Samsung AX34T, which does measure PM10, but it has a lower CADR rate, a bigger footprint, and much more expensive filters. The unit requires 200mm of free space around ALL sides, so make sure...view more I bought this because my partner suffers from a pollen allergy. We think the unit has made a difference, but it's hard to tell for sure because this unit doesn't measure PM10 (pollin) sized particles. It only measures and responds to PM2 sized particles (urban pollution) - so when on auto, it always run at the lowest speed. There is also the Xiaomi PRO model, which does measure PM10 particles, but has a bit bigger footprint. I also considered the Samsung AX34T, which does measure PM10, but it has a lower CADR rate, a bigger footprint, and much more expensive filters. The unit requires 200mm of free space around ALL sides, so make sure you allow for that. The front-controls are easy to understand. The Android app gives you more control, such as being able to turn off the negative ion generator, set a custom fan speed according to room size, or program on/off/speed changes for different times of the day. At the sleep setting it's relatively quiet, but there is a noticeable, fan/air-movement rustling sound which is pretty easy to get used to. At the lowest manual fan-speed (probably similar to sleep mode speed), the unit reports it can fully cope with a room of 5-9 square meters, it's pretty quiet up to 7-13m, but the noise lifts substantially after that. If run at top fan speed, you probably wouldn't want to be the same room with it. It feels like it's making a difference, it's easy to control, fits into the space, isn't too expensive, the consumables are not too expensive, it looks nice in the rom, so we're happy with it.

Had it for only a few weeks. No need to use it regularly as the house is well-ventilated enough but it helps with kids `allergies and after heavy cooking Had it for only a few weeks. No need to use it regularly as the house is well-ventilated enough but it helps with kids `allergies and after heavy cooking

I am sleeping in fresh air now. Feel so good I am sleeping in fresh air now. Feel so good

Very happy with this product.
With summer here my allergies have increased, this product made a noticeable difference within hours.
The app is a great feature. Very happy with this product.
With summer here my allergies have increased, this product made a noticeable difference within hours.
The app is a great feature.

this has been doing a great job in a very large room and bedroom , night mode is very quiet , can barely hear it . I used to wake up sneezing in middle of the night , i no longer do with this running so thats my proof, very happy with it , easy to use . the only niggle i have with it is that it only runs on 2.4ghz wifi and some minor options are only available on app, me being fussy. this has been doing a great job in a very large room and bedroom , night mode is very quiet , can barely hear it . I used to wake up sneezing in middle of the night , i no longer do with this running so thats my proof, very happy with it , easy to use . the only niggle i have with it is that it only runs on 2.4ghz wifi and some minor options are only available on app, me being fussy.

Great product, awesome app can control the device from anywhere. Quiet reliable and does what it is supposed to. Great product, awesome app can control the device from anywhere. Quiet reliable and does what it is supposed to.

Awesome product to buy Awesome product to buy

Very quiet just use at night to help with allergies so far so good Very quiet just use at night to help with allergies so far so good

Picked one up to see if it would help with hayfever in particular and does seem to have helped. Quite stylish and not too big so relatively unobtrusive and easy to tuck away when not in use. Didn't think it was too noisy, even at full bore and power usage seems relatively negligible. One wish might be that they had built a little carry handle into the case or even just a nook to put your hand when picking it up. Personally I haven't bothered with the app, seeing as I only use it infrequently so no comments on that. Picked one up to see if it would help with hayfever in particular and does seem to have helped. Quite stylish and not too big so relatively unobtrusive and easy to tuck away when not in use. Didn't think it was too noisy, even at full bore and power usage seems relatively negligible. One wish might be that they had built a little carry handle into the case or even just a nook to put your hand when picking it up. Personally I haven't bothered with the app, seeing as I only use it infrequently so no comments on that.

Effective and easy to used Effective and easy to used

stylish and practical stylish and practical

I have a large dining/lounge so needed a bigger unit. I bought it to combat hayfever and it has really helped. It is light enough to transport to my bedroom at night and it runs quietly. Very happy with this purchase so far. I have a large dining/lounge so needed a bigger unit. I bought it to combat hayfever and it has really helped. It is light enough to transport to my bedroom at night and it runs quietly. Very happy with this purchase so far.