Which? air purifier reviews will help you find the best air purifier for your home. Air purifiers have been assessed for pollen, dust and smoke removal, as well as noise and energy use. Models from top air purifier brands have been compared including Dyson, Philips, Vax, Blueair, Homedics, Bionaire and Delonghi. You can also use our expert advice to improve the air quality in your home.