Here are my top pick for best air purifier:
1) Whirlpool Whispure 450 Air Purifier
A basic model with higher capabilities in its range, Whispure 450 gives you three settings to interchange- low, medium or high speed. You will receive a carbon pre-filter which needs to be changed every 3 months and a HEPA filter that requires yearly change. It is not exactly portable with a 22″ height and an 11″ depth, and weighing about 20 pounds. This model cost an estimated USD 300 and can cover an area of up to 500 sq feet.
2) Whirlpool Whispure 510 Air Purifier
Upgraded version of the previous model of the same line, and retails at about USD 300, this is a true HEPA filtered purifier. It captures 99.97% of particles that are 0.3 microns or larger. HEPA filter also cleans the air that passes through it 4.8 times per hour more, determined by the unit and area space. There is a filter replacement indicator so that you know when the filters need to be changed. It has a 3- speed motor as well, and a special sleep mode that automatically lowers the fan speed for 8 hours and turns it back to its original setting after that.
3) Sharp FPP60CX HEPA-Filter Air Purifier
This elegant looking machine provides you efficiency that covers 330 sq ft coverage. It works really quietly so you won’t even remember its there. Weighing 19lbs and measuring 16.38″ in width, a 9.5″ depth and a 22.5″ in height, it will cost you approximately USD 390. The indicator will tell you when its time to replace the HEPA filters. Sharp combines passive air filtration with active air treatment to clean the air of pollen.
4) IQAir HealthPro Air Purifier
This model provides area coverage up to 900-1000 sq ft and has 6 speed options. It comes with a pre-filter that needs replacement in 6-18 months and the HEPA filter 2-4 years. It depends on how much you use it, in determining the frequency of filter replacement. This model has filter change indicators and remote control and the electronic LCD display helps you identify the settings easily even if you are in the dark. IQ Air is considered expensive with a price tag of an average USD 750.
