"Old-fashioned" ionizer / cleaner. Its filters are very thin and small in size, and in less than a month the carbon filters and in about three months the "HEPA" filters need replacement. They are not worth the 25€ that the importer asks for these filters (which filters do not even fit properly and require patents to close the gaps). Prefer something more modern.

The previous model, I breath 30, I would say is better compared to the new 30+. Maybe even with a significant difference...
The new model makes a noise, and for those who are sensitive to noises, I would not recommend it.
Also, compared to the older model, which I have had for 4 years, it lacks a remote control and the auto function that activates every half an hour (which is important for me in terms of economy and because you don't have to bother with opening and closing it, you just have it there and forget about it).

I tried to find the older model, but unfortunately, I can't find it anywhere. Maybe I replaced it more for the noise issue.

I hope I helped!

Simple device, small in size. For local "supplementary" use when it is not convenient to open windows, do not expect it to clean the entire air in the house. If you operate it at low speed, it is not very noisy, but if you have cigarette smoke at low speed, do not expect miracles. The more polluted the room you want to clean, the higher the fan speed (and noise, at the third level) should be increased, but there we have more immediate results.
I want to add the very explanatory link regarding the use and comparison of the danger of UV-C and UV-A radiation. UV-C can produce ozone and with the Photocatalytic oxidation (PCO) method that some devices have, it can be harmful. While this machine uses UV-A which will not burden us in the long run (as stated in a relevant article).
For more information, read the link.
https://molekule.science/which-air-purifiers-are-ozone-free-comparing-ionizers-uv-c-and-hepa/

At speed 1, it is quiet but unfortunately it doesn't do anything (at least for me who bought it because I smoke, space of about 15 square meters). At speed 2, it does something but the noise is a bit annoying. At speed 3, it also does a good job even in spaces larger than 20 square meters, but personally I can't stand this constant noise! I will use it for the bedroom at speed 1 and for a larger space, I will probably prefer something else.

In a 30sqm space it is extremely effective!
After one year of operation, the filters are relatively okay, they will need to be changed in 6 months, not every 2-3 months like in other machines. Another positive is that it has 1 activated carbon filter, with a mesh and a front filter, and another thicker filter, which precedes the activated carbon and collects dust and smoke. On the low setting, it is quiet, on the medium setting, it is just fine.