Blueair Genuine HEPASilent Replacement Filter for Blue 411/3210 Air Purifier – Removes 99.97% of Pollen, Dust, Pet Dander, Mould, Bacteria & Viruses Activated Carbon Reduces VOCs, Odours, Chemicals

This workhorse has proved absolutely reliable and effective over three years and counting.

These filters always last Me, six months or more works very well

Good valueExcellent for keeping room fresh

OK, it's pricy. But it is the main component of the Air purifier so it shouldn't come as a surprise. It looks well made and there's certainly more to it than a tube of paper. It fits the Blu Air purifier perfectly, is very easy to change over the old filter to the new one, and I can safely say there is plenty of evidence that larger particles of dust etc are filtered out going by the colour of the 6 month old filter I just replaced! Photographs attached, from different angles so you can see it isn't just shadow or light direction.I have two of the Blu Air filters running in my home and the air feels and smells much fresher since I got them. I usually run on lowest setting which is virtually silent but increase if any odours I want to shift (get cigarette smoke coming through from neighbouring flats).Comes in simple cardboard box, no excess packaging.

I would have marked this as 5 star for value for money, that is if it would stop going up in price. The £25 - £27 price tag it used to be seemed about fair, but ever since reviews have mentioned being cheaper than the website it has been going up in increments - my only gripe.That out of the way, I live with two smokers and the purifier is within my bedroom, ever since owning this purifier I can tell these filters are helping a lot, the air smells fresher and I notice a huge difference if the purifier is turned off.Also, efficiency is very much obvious from removal of the old filter as the brand new one is bright white and the old...most definitely not white so I would say they're very much effective and catch impurities in the air. I think their effectiveness for 6 months is about right too, I left mine going into the later date of month 7 and smoke into the room started to become more noticeable in the air.

Does the jobA thumbs up

We got far more use out of the original filters which came with the air purifiers than expected when we originally bought two of them. The replacement filters have proved to be money well spent and will give us benefits for a long time. Replacing the filters is a quick, clean and simple task taking less than a minute for each purifier. I did not get covered in fluff or dust when I changed the filters, so there seems to be no reason to fear getting dirty replacing them. Would I change the filters again if the purifier was still effective? Yes, I would.

Wonderful clean air with silent operation. The filter just works well and is of excellent quality.