Xiaomi - Mi Air Purifier Pro H

Mi something H - filters from Amazon for 45 euro (with a refund on mswt now that Germany removed the minimum spend of 50euro)

Xiaomi Pro H - that said, it doesn’t appear to be on sale at Galaxus anymore … now considering a second one for the bedroom… and there’s a new version (which looks identical to me) but with a UV light inside (always Xiaomi)

Xiaomi Pro H - sorry

New or higher end Xiaomi models (I think 3 Pro and later, 4 normal and later) have a laser particle detector and are dead accurate. Earlier models like the 3H I used to have were less accurate.

I have Xiaomi Air Purifiers in each room. Big one for living room, smaller ones for smaller rooms. My particle sensitive partner (allergies & athma) feels the difference Edit: as for why I trust it, did my share of research at the time, like airflow and all. Beside that, the Pm5 score readings have been very reliable, reflect every messy event in the house, the level of pollution when we open the windows, and goes down steadily when we close all doors&windows. New filters can be ordered on Lazada btw

The sensors on many of the cheaper air cleaners are not that great. Just make sure you get an air cleaner that fits with the size of the room and you'll be fine. Low price : XPXHome with an extra filter many times for around 750-800 thb Medium : Any Xiaomi, which you can control via an app if you want.