The Cooling Fan: Blueair Blue Pure Purifying Fan If you're not fussed about having a fan with auto mode, then you can opt for the brand's traditional Blueair Blue Pure Purifying Fan ($200). You can control the speed on your own, but it'll still clean your air and keep you cool on a hot day. Image Source: amazon.com Blueair Blue Pure Purifying Fan $200 from amazon.com Buy Now