Dyson Purifier Humidify+Cool PH2 De-NOx

The PH2 De-NOx (model PH05), which Dyson launched in late 2025, replaces the older PH04 as the current flagship and does three jobs: it purifies (a K-Carbon plus HEPA system Dyson says captures 99.95% of particles down to 0.1 microns and adsorbs more NO₂ than before), humidifies from a 5L tank for up to around 36 hours of what Dyson calls hygienic humidification, and cools as a bladeless fan. On features and build it is in a class of its own here, which is why it out-scores the budget picks despite its price. But as a humidifier alone it is not dramatically better than the far cheaper Levoit or Meaco, and its value is the weakest in this list: the lowest current UK price is around £550, with an RRP nearer £700 (checked September 2026, prices vary widely by retailer). We rank it third rather than higher precisely because most people searching for a 'humidifier' don't need the purify-and-cool functions enough to justify the outlay. Choose it as an all-year air-treatment centrepiece, not as a value humidifier.