Thanks to the rampant air pollution, air purifiers have become a necessity rather than a luxury for us city dwellers.
I am sure that the numerous brands, models and features of air purifiers available in the market would overwhelm you to the extent that you are unable to decide which one to buy. That is why we have formed this guide in an attempt to help you choose the best suitable air purifier.
In this article, we have shortlisted only the best. These are the air purifiers that you would want if your home is at Delhi, Gwalior, Allahabad, Patna or such heavily polluted cities.
They have best specifications which include high CADR (clean air delivery rate), best HEPA filters and are backed by strong, reputed and reliable manufacturers who are known for selling high quality appliances. We have also considered user reviews of these air purifiers to ensure that the device functions as per the manufacturer’s specifications and claims.
So, now, let us get started.
The first and foremost step that you have to do when you buy an air purifier is measure up the sq. ft. area of the room where you intend to keep the air purifier. Then, you can check our CADR calculator to determine what ought to be the CADR of the air purifier for the room. For best performance, use an air purifier for a single room, just like how you would use an AC. If you open the doors and try sharing an air purifier between 2 or more rooms, the efficiency will be hit.
Note- If you have just begun your search for the best air purifier for your home, then I would suggest you to read this buyer’s guide in order to familiarize with different types of air purifiers, different filter systems and factors to consider while choosing an air purifier.
Manufacturers of each of the air purifiers in the below list claim that their purifiers eradicate allergens, capture virus, bacteria, gas, smoke, odour etc. Basically, that is what carbon and HEPA filter together does. Hence, we have not mentioned this separately for each.
A term that you will frequent come across in this article is ACH rating. ACH refers to air change per hour. It means the number of times air in a room of given size is changed to purified air by the air purifier. AHAM ( American Home Appliances Manufacturers) recommend using air purifiers of ACH higher than 4 for asthma/allergy sufferers and for homes located in heavily polluted cities. Read our article on CADR-ACH to know more,
Best Air Purifiers In India
Performance: Honeywell air purifiers generally are superior in performance.
The company is known to supply higher grade version of its air purifiers for NASA space stations. Obviously, we can’t expect that kind of a superiority for their home air purifiers. But still, Honeywell has a reputation of selling quality products and customers have rated their Air Touch i8 highly satisfactory that it is one of the Amazon choice products indicating best quality and price.
The Airtouch i8 is available in 2 colours—white and champagne. The air purifier employs three stage filtration system that consist of a prefilter, HiSiv and HEPA filter.
While all air purifiers use activated carbon for absorbing VOCs, formaldehyde, ozone and other odours, Honeywell uses HiSiv.
So, what is HiSiv? HiSiv stands for high-silica hydrophobic molecular sieve, which is a high efficiency absorbing agent that is used for various industrial application that require an advanced filtration system. The molecular sieve of silica has empty space that are consistent in diameter. So, it can absorb molecules of selective dimension inside the crystal even when the contaminant is low in concentration. Thus, HiSiv formula is customized to be able to absorb Formaldehyde, ammonia, ozone, and all types of odours and VOC. In order to prevent secondary pollution due to the contaminants, CTOX catalyst is added in the crystal to decompose the absorbed contaminants.
The HEPA filter used in the air purifier is of H11 grade. It is capable of absorbing up to 99% of particulate matter larger than 0.3 micron. This might be the only aspect that is a bit lacking for Honeywell purifiers. Sharp and Atlanta uses H14 and H13 grade HEPA filters respectively, which are more efficient in filtering impurities and contaminants larger than 0.3 microns.
Now, let us take a look at the air flow rate.
Honeywell Air Touch i8 has a CADR of 300 m3/hr. The company recommends using it in a room of size less than 387 sq. ft. However, the ACH rating in that case would be about 3. If you want to achieve an ACH rating of 4 or more, we would recommend you to use it in a room of size less than 295 sq. ft.
Just like the Allergen mode in Philips AC 3256/20, Honeywell Air Touch i8 also has an intelligent auto mode that steps up the fan speed and works to bring restore the air purity. It also has real-time display of PM 2.5 level and tri-color LED indicator of air purity too.
Other useful features
Maintenance: Filters of Honeywell air purifiers are long lasting with 3000-hour life. So, if you use it for about 8 hours daily, you can use it for more than a year. Its replacement cost comes to about Rs. 4300.
CADR: 367 m3/hr
Performance: With sophisticated design, advanced features and high air purifying efficiency, AC3256/20 is one of the best air purifiers from Philips.
Talking about the filtration system, AC 3256/20 has a 3 stage filtration system that consists of a pre-filter, activated carbon filter and a HEPA filter.
The activated carbon filter has a high grade honeycomb structure that can be expanded to about the size of 20 football fields and has high absorption capacity for VOCs ( volatile organic compounds).
The HEPA filter used in AC3256 is thicker anti-bacteria coated. When you read HEPA layer 1 and HEPA layer 2 in the product description given in Amazon, you might think it is 2 layers of HEPA filter. But when you read carefully, you can understand it is just an anti-bacterial coating—something that many other brands offer.
Now, let us take a look at the air flow rate.
AC3256/20 has a smoke CADR of 367 m3/hr and pollen CADR of 430m3/hr—making it apt for large bedrooms and living rooms.
Though manufacturer recommends using it for room of size 95m2, if used in such a large room, the ACH (air change per hour) rating would be just 1.41. To maintain ACH of 4 and above, we recommend using it for rooms of size less than 360 sq. ft.
As the air purifier features an aerodynamic vortex design, it has good efficiency in sucking in impure air.
A very useful feature of AC3256/20 is the allergen mode. When you switch it on, the air purifier gets in to a hyper mode you can say. It looks out for any fall in air quality and upon detecting it, the turbo fan is switched on automatically to restore the air quality. Once the air quality reaches back to the optimal level, the turbo fan is switched off and the fan runs at a lower speed to maintain the air quality.
Other useful features
Maintenance: As with all other air purifiers, the pre-filter can be cleaned with a dry brush or vacuum cleaner. The activated carbon filter has a life of 12 months and HEPA filter a life of up to 24 months depending on level of usage and pollution level in your city.
The HEPA filter costs about Rs. 3400 and activated carbon filter costs about Rs. 2100. You can buy them online through Amazon or directly from Philips website. As Philips air purifiers use DIY system, you can change the filters on your own without having to depend on a technician.
CADR: 334 m3/hr
Performance: Being one of the newer models from Philips, AC 2887/20 features thicker nano protect True HEPA filter, higher CADR and memory function which switches on back to the pre-set mode after a power failure.
The nano protect True HEPA filter is said to have longer life of 24 months under normal conditions and the filter has a higher efficiency of capturing up to 99.97% of particulate matter larger than 0.3 microns.
The activated carbon filter used in Philips AC 2887/20 also has a high-grade honeycomb structure which when expanded stretches to the size of 43 football courts—indicating high efficiency in purifying VOCs (volatile organic compounds) and smoke.
As per the Philips website, the 2000 Series Aerasense 2887/20 has smoke CADR of 334 m3/hr and formaldehyde CADR of 200 m3/hr. They also recommend using it for rooms of size 24-41 m2 (258- 441sq. ft). When you use the air purifier as per manufacturer recommendation, that is for 258 sq. ft area, the air change rate will be 5.05, which is pretty good and if you use it for 441 sq. ft., the air change rate will be 2.95 which is not optimal.
Air change rate of 4 is considered to be ideal for asthma, allergy patients as well as for homes in polluted cities. Hence, we recommend using this air purifier in a room of size less than 330 Sq. Ft.
What makes AC2887 different from its previous version AC2882 is the real-time display of PM 2.5 level in your room and 4 color ring that glows from red to blue as the quality of air improves.
Other Useful Features:
Maintenance: The pre-filter of AC2887 can be cleaned with a vacuum cleaner or a soft dry brush. None of the filters should come in contact with water ever.
The carbon filter usually lasts for about 12-14 months, while the HEPA filter could last up to 24 months depending on the usage and environmental conditions.
The activated carbon filter costs about Rs. 1500, while the HEPA filter costs about Rs. 2500.
A frequent complaint seen is that the purifier starts emitting an odour after using for some time. This is because of the presence of moisture, germs and other contaminants in the filter. In such cases, you will have to remove the filters and put it in the sun for sanitizing it.
CADR: 240 m3/hr
Performance: Sharp FP-FM40E-B33 is perhaps world’s first air purifier with mosquito catcher. But other than the mosquito catching option, what really makes Sharp air purifiers a notch above the rest is the use of H14 grade HEPA filter—which is the highest grade HEPA filter that offers 99.995% purifying efficiency for removing PM 2.5 particles, smoke, dust and pollen.
Like all air purifiers, Sharp also has a pre-filter, activated carbon filter and a HEPA filter.
In addition to these, Sharp also uses plasmacluster technology which produces positive and negative ions using the moisture in the air. The ions attach to the surface of bacteria and virus, extracting the protein and killing it before it returns to the air as water vapour. This is especially useful for eradicating dust mites. Note that the plasmacluster technology does not produce ozone gas—a potential lung irritant. So, you can use it even if any of your family members suffer from asthma/ allergy.
The CADR of the air purifier is 240m3/hr as per Sharp’s website. This makes it apt for rooms less than 240 sq. ft in size.
Now, the most awaited feature—the mosquito catcher. How does it work? The black coloured air purifier emits a blue light which attracts the mosquitoes. Then, the power airflow sucks the mosquito inside where it gets stuck on to a strong glue sheet.
Reviews suggest that the mosquito catcher is found to be fairly effective. If mosquitoes are a real menace at your home, Sharp FP-FM40E-B 33 will be a huge relief for you. But if they are far and few, it might not really be worth the extra money you spend.
Maintenance: You will have to contact dealers or Sharp’s customer care for buying activated carbon and HEPA filter. The air filter set costs about Rs. 8-9000.
In addition to these, you will also have to change the glue sheet used for catching mosquitoes every month at a cost of Rs. 1000 per sheet.
CADR: 210 m3/hr
Performance: This air purifier from Panasonic employs a composite air filter with pre-filter, activated carbon filter and HEPA filter and has an anti-bacterial coating, which inhibits 17 types of virus and bacteria. The purifier also employs nanoe technology, which is actually a type of ionizer, which the manufacturers claim helps keep skin soft and hydrated. However, there is no clarity whether or not it emits ozone in the ionization process.
The manufacturer states that it is suitable for room of size less than 283 sq. ft and has a CADR of 210 cubic metre per hour and air change rate of 2.90. For an ACH rating of 4, you may have to use it for room lesser than size 205 sq. ft.
Other useful features
Maintenance: The filter used in this model of air purifier has a life of 2 years and can be bought from any of Panasonic’s service centres. Regular maintenance of the pre-filter can be done by vacuum cleaning or using a soft brush.