Which is the best air purifier?

With air quality at its all time worst, home air purifier or air filter is the latest must-buy home appliance. Instead of panicking and going by the words of manufacturers and retailers, it will be wiser to do some research. Our Experts compared 20+ models of 12 brands of home air purifiers on the basis of air purifier price, air-delivery rate, power consumption, warranty along with other important parameters to educate you to know the best air purifier or air filter for home buyers.


A home air purifier is a device that removes contaminants (including PM 2.5 particles) from the air in a room. This it does by sucking in the air present in the room and running it through multiple layers of filters to capture the impurities and particulate matter. These devices are commonly marketed as being beneficial to allergy sufferers and asthmatics, and also effective at reducing or eliminating secondhand tobacco smoke. Air purifiers are becoming increasingly capable of capturing a greater number of bacterial, virus and DNA-damaging particulates. High-efficiency particulate air or HEPA air purifier removes particles by capturing them on filter materials and can clear the air of dust, pollen, pet dander, smoke, etc. The commercially graded air purifiers are manufactured as either small standalone units or larger units that can be affixed to an air-handler unit.

Consumer VOICE compared air purifiers to understand how theywork to serve their basic purpose, and how they can do this job best. We have also compared the leading models of air purifiers available in the Indian market, in terms of parameters like their CADR that is Clear Air Delivery Rate, coverage area, power consumption, noise level, price and warranty. While brands will do what they have to in order to sell their wares, we as consumers must take sensible precautions to understand the technology we are getting into our homes and what the give and take is. We must also now the various types of air purifiers available in the market, important technical terms that the retailers use to sell them and what is the operational cost of air filters.


  • Kent
  • Philips
  • Panasonic
  • Sharp
  • Daikin
  • LG


  • Blue air
  • Pureit
  • Tefal
  • Xiami
  • Crompton
  • Honeywell



  • Air-delivery rate
  • Power consumption
  • Noise level



  • Coverage area
  • Warranty


Comparison at a Glance: Of Air Purifiers (for domestic use)

For our survey, we shortlisted models of 12 popular brands of air purifiers. We conducted the survey during December 2017.

Notes: Company and commercial websites and information collected from Delhi NCR retailers.
Sources: Price may vary from retailer to retailer. Before buying please check detailed specification on the company’s website and compare the models.

Note to Consumers

Notwithstanding the fact that most air-purifier companies are selling you products by scaring you, selling devices with exaggerated features that you don’t need, remember that an air purifier is a simple device with a fan that sucks in air and blows it out and has a filter(s) that cleans that air. There is nothing else to it. A lot of manufacturers claim very high clean air delivery rates, but there really is no industry standard. You need to have a general idea about the room size where you will use it.

Most air purifiers are sold based on high-sounding, self-named technology, looks and number of filters, while its efficiency lies elsewhere. Unfortunately, there is a bit of jargon and acronyms involved. Pay heed as this really matters.