The BlueAir Protect 7470i, a powerful air purifier capable of handling rooms up to 2000 sq ft, is currently on sale for $449.99 at Amazon. This smart-enabled purifier filters out 99.97% of airborne particles, including dust, pollen, pet dander, smoke, and more. Its quiet operation and impressive filtration speed make it a great option for allergy sufferers and those seeking cleaner air.