I use air purifiers for years since I suffer of dust allergy and I was looking for a new air purifier last month because my previous one was broken (fell down from the table). So, since I was satisfied by my last one, I wanted to buy another one from the same brand until my sister told me that I should try the same she uses. Then after looking for some informations, I found out that this air purifier wasn't using a HEPA filter but a e2f filter (new technology). Last month I finally bought the bf2025 because of its pure design and I can say that it's really economic, quiet and the filter is easy to replace. I'm really pleased and that's why I recommand this website to everybody.