Good filter and a tip is to lightly vacuum off the dust that collects on the outer surface (the surface facing outwards and not the surface facing the white hepa filter). Doing this ensures that more air can come into contact with the carbon. Note: the Air Purifier 2000 series can use both the FY2420/20 and FY2420/30 filters. The only difference is the /30 can go into the 3000 series and is generally more expensive or hardly offered at a discount.

I purchased a new one in February 2020 and now in May I need a new one, the filter is already completely clogged up with dust. I do live on the 5th floor so I am not exactly right next to the street and not a main road either...

These do what they are meant to. I am blown away by some reviewers mentioning dust on the filters. Please note that these machines are meant to clean the air- not vacuum. We switch the machines off EVERY WEEK and clean the filters. We also vacuum the rooms twice a week. The result? Hardly any dirt or dust on the filters, despite having two, very moulting cats. Please don't buy these to replace your vacuum cleaner. I can honestly say that the filters are well worth paying for if you value your health. You can taste the clean air and my wifes asthma has improved ten fold! The amazing thing is, when the cats use their litter tray, the machines comes alive, whiring into action, cleaning the air. Amazing sensors, Amazing Technology!