This. Ventilation is critical, lest you get other issues such as mould which is a whole other set of problems in itself. IKEA do some very good value devices.

This. Ventilation is critical, lest you get other issues such as mould which is a whole other set of problems in itself. IKEA do some very good value devices. The Fornuftigs are nice, but quite weak. The Starkvind smart purifiers are better. They’re explicitly not HEPA and aim for less dense media / higher cycles, and they produce generally similar results at lower costs. (There are some poorly informed reviews online that give a bad review because they’re not marketed as true HEPA filters, but this misses the point of cleaning the air you breathe rather than the air inside the unit. There was a post that corrected these reviews on HN some time back, will try to dig out and update). LINK: https://news.ycombinator.com/item?id=31812259 https://news.ycombinator.com/item?id=31812259