Dyson Purifier Cool TP4B Purifying Fan $350 at Amazon $350 $550 Prime members only. Amazon has the Dyson Purifier Cool TP4B Purifying Fan (White/Silver) for $350 with free shipping. Has a HEPA filter that removes 99.97% of particles as small as 0.3 microns in size. $350 retail: $550 Posted by VanGogh07/12/2024 at 12:15 PM PT