Top 7 Best Air Purifiers in India: 2019 Reviews & Buying Guide

Pollution, in today’s world, is considered one of the foremost problems. It is slowly killing the planet from the inside out. One of the major aspects of this is air pollution. Yes, the very air we breathe is not pure. It is toxic, full of pollutants, and often harmful to our physiology. Since there is no way to control the pollution of air at large, the best we can do is control the air which centers and circulates within our homes. This can be achieved through the action of wondrous machines known as Air Purifiers.

The working of an air purifier is rather simple. It uses powerful fans inside the mechanism to pull in the impure air into it and forces the air to pass through a number of filters, making it clean and pure to breathe, and then releases it back into the room. Over a certain period of time, the air is passed through these filters numerous times, making the majority of the air safer to breathe. This is basically how air purifiers achieve purer, safer air.

There are a few types of air filters, including

  • HEPA filters,
  • ionizers,
  • ozone generators,
  • electro-static filters,
  • UV Light Filters and
  • Activated Carbon Filters.

All of these serve the same purpose, in varying ways. They clean the air, remove irritants, remove pollutants, and even neutralize smoke particles. If a household has a pet, it is bound to shed, which are also removed by the purifier. Dust is restricted and germs are not allowed to spread, as they are sucked into the mechanism. For a person with allergies, this is an essential buy.

In the seasons of spring and summer, due to pollen and other allergens, such people suffer greatly. The air itself is laden with irritants and this cannot be avoided without an air purifier. The purifier removes all these pollutants and allows the user to breath clean and pollutant free air.

The only problem is not knowing which one to purchase, as manufacturers have produced numerous models with varying promises and features. For any clarifications about which purifier to purchase, kindly refer to our “AirPurifier Buyer’s Guide“! It will surely help you chose the ideal air purifier for you. We also have a list of the top 7 air purifiers in India that you can go for. Check it out!

Best Air Purifiers in India

Best Air PurifierNo'of FiltersCDARCoverage Area WeightWarrantyBuy Now
Mi Air Purifier 2S3310 m3/hr400 Sq. Ft.4.8Kg1 year Check the Price
Atlanta Healthcare Beta 350 Air Purifier 7170 m3/hr350 Sq. Ft.4.8Kg1 year Check the Price
Coway Sleek Pro AP-1009 Air3303 m3/hr355 Sq. Ft.7.5Kg3 years Check the Price
Philips 3000 Series AC3256/20 AeraSense Air Purifier3376 m3/hr818 Sq. Ft.9.8Kg2 years Check the Price
Honeywell HAC25M1201W Room Air Purifier3250 m3/hr323 Sq. Ft.6.2Kg1 year Check the Price
Airspa With Device Tms 16 Hepa Air Purifier 6180 m3/hr350 Sq. Ft.4.8Kg1 year Check the Price
Ooze H3O Air Series Air Purifier 7480 m3/hr1000 Sq. Ft.8.0Kg1 year Check the Price

Top 7 Best Air Purifiers Reviews in India 2019

1. Mi Air Purifier 2S (White)

Mi Air Purifier 2S

Mi is known for its reliable performance, durability, and budget-friendly products and the Mi Air Purifier 2S is no different. This air purifier is ideal for indoors and is equipped with powerful three-layer filtration system and an OLED display that auto-adjusts its brightness according to its surroundings and indicates the air quality index (AQI) of the room. So, if you are searching for an air purifier that has performance efficiency and cost-effectiveness at the same time, the Mi Air Purifier 2S will be our first recommendation to you.

It has a stylish tower structure in white that consumes little space and adds a stylish touch to your interiors. This air purifier has a plastic body with a cylindrical shaped filter and detachable power cable. One of the best things about this machine is its smart control system that you can monitor through the Mi home app, or you can ask Alexa (i.e., if you have it at home) to do it for you.

This air purifier has three modes- auto, sleep, and favorite. And you can change these modes through the Mi Home app on your smartphone. On this app, you can as well see the temperature and humidity of the room. It also notifies when the filter needs to be changed. This machine comes with a 1-year warranty and holds the capacity to purify the air of a 400sq ft room at a clean air delivery rate (CADR) of 310 m3/hr.

The outermost layer of the filter eliminates large particles and pet dander. The middle layer comprises of an H11-grade filtration technology from TORAY, Japan and is dedicated to removing bacteria and micron size particle. The innermost layer of its filter is made of activated carbon and weeds out formaldehyde and odors.

Notable Features

  • Lightweight and compact design with a dimension of 24 x 24 x 52 cm that makes it portable.
  • This purifier has a cylindrical filter that provides three layers of filtration.
  • It has 943 intake holes that form a 360° cyclical air filtration pathway.
  • Its efficient filtration removes PM 2.5.
  • It is energy efficient and has an ultra-quiet sleep mode.
  • Auto turn-off after the air quality Index is good enough.

Our Verdict

This product does not produce any ozone and comes in a compact design with a fan on top. It gives a power-packed performance and can enhance the air quality of 400 sq. ft of carpet area significantly in just 10 mins. It is perhaps the best buy for people who live in polluted cities as this machine can weed out even the tiniest of particulate matters. If you are on a lookout for one purifier that stands true to all its claims and is within your budget, this is the air purifier to go for.

What We Like

  • Scientifically designed and efficient3-layer filter
  • Displays AQI
  • CADR 310 m3/hr.
  • Smart control and monitoring feature
  • Budget-friendly
  • Portable and energy efficient
  • Has sleep mode

What We Don’t Like

  • Short power cable
  • Manual mode can be noisy
  • Higher filter replacement cost
  • No onsite Warranty

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2. Atlanta Healthcare Beta 350 43-Watt Air Purifier with Remote Control

Atlanta Healthcare Beta 350

Atlanta Beta 350 uses iCluster technology to eliminate all the toxins and pollutants from the air by passing it through 7 stages of filtration. It does an all-in-one job of removing toxins, pollutants, odors, allergens, dust, and smoke from the air by using an H13 grade HEPA filter. This purifier is perfect for homes, offices, and hospitals. Because of its versatility, and excellent air purifying ability, it ranks 2nd on our list of the best air purifiers.

It has a compact design with a white plastic body that weighs 4.8 kgs and comes with remote control and a user manual. The air-inlets are placed on the sides of this machine, and it sends out the purified air from the top.  It features a handle for easy-movability and can purify the air of a 350sq ft. of carpet area at the rate of 170 m3/hr. CADR.

This purifier has a timer, various modes, and speeds of fan that one can adjust manually or through remote control. It has a display that shows the level of air quality but does not give exact detail of the AQI. You can use a vacuum cleaner to clean the filters if you want or replace it altogether after 8 to 12 months of usage. It has a special night mode so that you can sleep peacefully and comes with a warranty of 1 year.

The 7-stage filtration includes- pre-filter, antibacterial filter, UV light, HEPA filter, photocatalyst oxidization, ionizer, and activated carbon. After the air is sucked in via the inlets, it is passed through all layers of filtration to eradicate the pollutants and enhance its quality before releasing back into the room.

Notable Features

  • This purifier comes with an LED display.
  • Uses advanced 7 stage air filtration technology that can eliminate PM 2.5 and PM 10
  • It comes with a night mode for extra-quiet operation.
  • Ionizer and UV light can be switched off.
  • It has a timer, several modes, and adjustable fan speed.

Our Verdict

If you live in a place with a high rate of pollution, this purifier will aid you to lead a healthier life. It is lightweight and easily portable. The reason we placed it on second is, the CADR is 170 m3/hr, which is low as compared to Mi purifier. But it is still good enough to clean the air pretty quickly as it is equipped with an advanced air filtration mechanism.

Things We Like

  • H13 grade HEPA filter
  • iCluster technology with 7-layer air filter
  • Multiple Modes
  • Remote control facility
  • Extra quiet night mode
  • Odor sensor
  • Compact and portable

Things We Don’t Like

  • CADR 170 m3/hr.
  • Bright display
  • Does not display AQI

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3. Coway Sleek Pro AP-1009 Air

Coway Sleek Pro AP-1009 Air Purifier

Coway is a Korean brand with a legacy in making home appliances that are efficient and durable. The Coway Sleek Pro AP-1009 air purifier comes fitted with a 3-layer air filter that runs for a massive 85000 hours, which lasts for 4 to 6 years. The sturdy built & quality, sleek design, and insignificant recurring cost have propelled us to place this Korean air purifier on the 3rd position.

Its innovative design has an LED light indicator. The LED light turns pink when there is some degree of pollution in the air, and it is red when the air quality is poor; else, it shows a blue light to indicate high quality air. However, the absence of AQI reader and lack of controlling options are counted among its drawbacks.

The box contains

  • Air purifier,
  • Pre-filter,
  • Patented urethane carbon filter,
  • True HEPA filter,
  • Power cord, and
  • User manual.

It weighs around 7.5 kgs and has a dimension of 66.6 x 33.5 x 20.4 cms. CADR 303 m3/hr efficiently eradicates pollutants like PM 2.5, dust, odours, etc. and covers an area of 355sq ft.

You will get the option to choose from its four speeds of the fan, that includes a turbo speed as well for rapid air purification. You can also set it to the auto mode and relax, as this mode adjusts the speed of the fan depending on the level of pollutants in the room.

It uses True HEPA technology, which is of the highest quality and can capture about 99.97% particles bigger than 0.3 microns. Keep in mind, there is AQI reader and other controlling options.

The company offers a full refund if you report any manufacturing defect within ten days of purchase. The product comes with 3 years of warranty on the motor and one-year warranty on other electrical parts.

Notable Features

  • This purifier has 3-layer filtration and uses True HEPA air filter.
  • It is a certified energy efficient air purifier.
  • It has a power cable of 6 ft. length.
  • CADR 303 m3/hr covers and purifies the air of 355 sq. ft.

Our Verdict

  • This sleek air purifier works noiselessly and will take the looks of your interiors a notch higher. If you are searching for a purifier that does its job effectively and has filters that last years, the Coway Sleek Pro AP-1009 will be our recommendation to you. Its cost is a tad bit higher than other brands, but its low maintenance and high performance is entirely worth the price.

What We Like

  • True HEPA filtration technology
  • Compact design and stylish looks
  • 3 years warranty on motor
  • Filter that lasts 4 to 6 years
  • Low power consumption
  • CADR 303 m3/hr
  • Good customer care support

What We Don’t Like

  • Noisy turbo mode
  • Allows only manual controlling
  • NO AQI reading available

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4. Philips 3000 Series AC3256/20 60-Watt AeraSense Air Purifier

Philips 3000 Series AC3256

This purifier comes from one of the most trusted brands around the world. With its AeraSense technology that detects even the slightest change in the air quality and gives real-time air quality reading along with Vitashield IPS that is unique, high-performance air purification method, there is nothing not to like about this purifier! It has CADR 376 m3 and covers an area of 818 sq. Ft. And so, it is priced higher as compared to all other purifiers on this list.

It is loaded with several other features like allergen mode, Real-time numerical PM2.5, sensor touch, and sleep mode. But an ionizer and a remote controller are not present in it, which is expected, given its price. And so, it occupies the fourth position on our list.

It has a coverage area of 818 sq. ft, and is suitable for very large bedrooms or living rooms. If you are not willing to invest this much as you need a purifier for a small or medium bedroom, you can check out Philips 2000 Series AeraSense AC2887. It has most of the features, costs lesser and has the efficiency to purify the air of a place that does not exceed 414 sq. ft.

Its Nano Protect S3 activated carbon filter, and True HEPA filter can eliminate ultrafine particles up to 0.2 microns, which is more than many purifiers will do. You cannot wash or vacuum its filters. You will have to replace it once it is exhausted. However, its pre-filter is washable.

This purifier by Philips has a very scientific design that allows maximum airflow into the room. It has an LED display with touch sensors at its top. The product comes with 2 years warranty and a filter life that lasts between 9 months to 3 years, which is pretty decent.

Notable Features

  • This purifier has Allergen mode, the detects and exterminates the allergy causing compounds in the air
  • The weight of this machine is 9.83 kgs and has a dimension of 47.4 x 34 x 79.8 cm.
  • Nano Protect S3 Activated Carbon and true HEPA filter can trap pollutants greater than 0.2 microns.
  • It has CADR376 m3/Hr that can purify the ait of a large area of 818 sq. ft.
  • It has a rate of air change of 5.5 times an hour that ensures fresh air every time you inhale
  • This unit incorporates 5-speed settings and has a child lock feature, that ensures your safety.

Our Verdict

The numerous features, settings, and modes this purifier incorporates, you couldn’t have asked for more in this realm! Though it has reactive touch sensors, the absence of a remote or other smart-control options is somewhat felt. If you want a unit that can purify the air of a large area, this is an excellent choice. It enhances the air quality to such an extent that you are bound to feel the difference once you install it.

What We Like

  • Nano Protect HEPA Filter
  • Covers 818 sq. ft.
  • Durable filters
  • 5 speed-settings
  • The unit has a handle for easy movability
  • Auto adjustable LED light while on sleep mode
  • Allergen mode, extra-quiet sleep mode, AeraSense technology
  • Real-time PM 2.5 rating
  • Indicator for filter replacement

What We Don’t Like

  • Non-washable filters
  • Higher price
  • No remote controller

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5. Honeywell HAC25M1201W 53-Watt Room Air Purifier

Honeywell HAC25M1201W 53-Watt Room Air Purifier

The Honeywell HAC25M1201W is a certified product by the ECARF for its superb air quality it produces by removing microscopic allergens from the air. The reasons for this air purifier to be on our is are – it is cost effective, uses 3-layer HEPA filter, has a 3D suction method that distributes and circulates the air in the entire room and comes loaded with sleep mode, auto mode and a child lock/ anti-fall system.

Apart from the white model, it also comes in an appealing champagne gold color, which is priced slightly higher. It weighs 6.2 kgs and has a dimension of 56 x 45 x 28 cm, that makes it very portable. But the lack of a gripping handle somewhat makes it difficult to carry around. It has a touch screen LED display on the top with color-indicator to indicate the air quality.

The unit sucks in impure air from inlets that are placed on both the sides and the bottom. After sucking in the air, it passes it through its 3-stage air HEPA purification technology that removes PM 2.5, toxic gases formaldehyde, VOCs, and odours before releasing it out from the top. It has a CADR of 250 m3/hr and is perfect for an area that does not exceed 323 sq. ft.

The filters of this purifier have a lifetime of 3000 hours. It would last between 9 months to 1 year if used daily for 8 hours. The HEPA filter can remove 99% of PM 2.5, which good enough but slightly lesser than the efficiency of many other filters

Notable Features

  • This model has three fan settings. The higher the fan speed, the quicker the air-purification process.
  • It has 1 year of warranty on the product.
  • The Honeywell purifier produces no ozone or other harmful substances.
  • Color indicator for the quality of air in the room. Blue stands for good quality; orange signifies medium quality; red denotes poor quality air.
  • It has an indicator that notifies the need for changing the filters on time.

Our Verdict

This unit is suitable if you do not stay in an extremely polluted city. It produces decent quality air via its 3-stage filtration technology and is one of the best budget buys. It does not have any remote controlling option. So, if you are willing to avail an air purifier that needs manual handling and is good for its price, you can most definitely buy this Honeywell air purifier for your home.

What We Like

  • 3000 hours filter life
  • Multi-modes and fan speed
  • Child lock feature
  • Stylish and compact
  • CADR 250 m3/hr and coverage area of 323 sq. ft.

What We Don’t Like

  • Non-washable filters
  • Does not have a timer
  • Higher fan speeds can be noisy
  • A few of the users had a problem with its ‘anti-fall/ child lock’ feature.
  • Does not display AQI

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6. Airspa With Device Tms 16 Hepa Air Purifier With Unique 6 Stage Filtration + Remote Control

Airspa With Device Tms 16 Hepa Air Purifier

This brand was established in the year 2015, and since then, it has performed pretty well in capturing the market. The air purifier produces fresh air by processing it through its 6 stages of the air filtration process. Though it gives out high-quality air and is suitable for very polluted cities, however, it requires some maintenance. The HEPA filter and anti-microbial fiber require cleaning every two months! Another added downside of it is, it does not have an indicator to indicate that the filters need changing or cleaning.

It is undoubtedly one of the best in the market, but because of its maintenance requirement and CADR of just 180 m3/hour, which is lower than many of the machines on this list, we placed it 6th on the list of most recommended air purifiers.

It has 6 layers of filters that are dedicated to making the ambience of your house super healthy. This unit has Pre-filter, HEPA filter, a filter of activated carbon, anti-microbial filter with just 5 microns width, UV light, and ionizer. All of these combined eradicates all the pollutants including PM.2.5, TVOC (Total volatile organic compounds) and bacteria. You can switch off the UV light and ionizer according to your need.

Another plus point of this purifier is, it is very quiet and will not hinder your sleep at all. You can as well set a timer or adjust the fan speed according to your liking.

This unit is sensitive to the surrounding temperature and humidity levels. It has a negative ionizer which is not suitable for asthmatics. Also, it removes only 96.5% of PM 2.5, which is way lower than other purifiers

Notable Features

  • 6-stage filtration system
  • This purifier comes with remote control
  • It has a display that shows various modes and the air quality
  • The noise production of this machine is just 18 Db.
  • There are 4 fan modes to choose from.
  • It comes with a warranty of 1-year from the date of purchase.
  • This unit weighs just 4.8kgs which makes it very portable.
  • It has a color indicator for air quality but does not display PM 2.5. If you would like a machine that gives PM 2.5 reading, you can consider the Airspa TMS 17

Our Verdict

Overall, Airspa TMS 16 is reasonably priced, has an easy installation, and gives a very decent service. It is a worthy buy if you are willing to spend a little time cleaning a few filters every two months, which needs to be completely replaced after 15 to 16 months of usage.

What We Like

  • 6 stages of filtration technology
  • Remote controller
  • Adjustable fan speeds
  • Provision to switch off ionizer and UV lamp
  • Does not produce much noise

What We Don’t Like

  • A timer is not available
  • Sensitive to surrounding conditions
  • No PM.2.5 display
  • Requires frequent cleaning
  • CADR 180 m3/hour

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7. Ooze H3O Air Series Ve2 With Aerosense And Hepa Cluster 7 Stage Purification Technology  

Ooze H3O Air Series Ve2 With Aerosense And Hepa Cluster

If you want a next-gen purifier that uses cluster technology by employing 7 layers of filters to purify the air, you have to choose the Ooze H3O Air Series Ve2. It has a CADR of 480 m3/hr and can exterminate airborne contaminants of an area under 1000 sq. ft.

This model has a classy black and white finish, but its design might not look the best in its range. It comes with a PM 2.5 display. But several customers have shown their skepticism regarding its accuracy, and so we have given it the 7th position.

Along with the pre-filter, HEPA filter, and activated carbon filter, this air purifier has Photo Cold Catalyst for the elimination of formaldehyde and VOCs, an Antibacterial Filter that removes ailment-causing microbes and germs, UV rays and ionizer.

It has a warranty of 1 year, which is only against manufacturing defects.  It does not cover any damage done to the body of the machine or any external accessory. The warranty even doesn’t cover damage done through daily wear and tear or improper installation. So, if you plan to buy this product, do give the warranty clause a good read or call their customer care to know more.

It comes with a remote controller and several modes that give you an array of options to choose from. The unit is known for its silent functioning with a noise level of 29 Db. But when it comes to power consumption, it consumes 80 watts, which isn’t too much but is definitely more than all other purifiers on this list.

Notable Features

  • This machine is equipped with a humidifier, using which you can adjust the humidity level of the room.
  • It shows PM 2.5 reading on its display
  • The remote controlling option makes it easier to handle
  • It has an efficient auto mode that automatically adjusts the fan speed based on the air quality of the room.
  • This machine has 3 adjustable fan speeds that you can control via remote.

Our Verdict

This is a mid-range purifier with impressive performance. Its filters last for approximately a year, which implies less frequent recurring expenditure. It weighs 8kgs but does not have a proper handle for it to be carried around. If the ‘no warranty against wear and tear’ and average look of the model isn’t a problem, you can readily opt for this next-gen purifier.

What We Like

  • Cluster 7 stage purification technology
  • Efficient auto mode
  • Presence of humidifier and remote controlling option
  • Less noise production
  • Covers 1000 sq. ft.
  • UV sterilization and ionizer

What We Don’t Like

  • Lack of handles
  • Design is not appealing
  • No warranty against wear and tear during the warranty period.

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Air Purifier Buying Guide

You just read all the reviews regarding our top 10 picks of the best air purifiers. But when it comes to purchase an air purifier, things get a lot harder which is the reason we have created this buying guide.

It won’t be so simple to choose the best looking one from the crowd. It has to suit your needs, it has to be in your price range and it needs to be capable enough to remove those exact pollutants from the air of your room so that you can finally breathe freely.

Also, there are a few variations of the filters; some of the purifiers use a combination of filter. Those types of purifiers are capable of eliminating more than one type of pollutants; they are very modern and considered the most effective ones.

But first, do you really need an Air Purifier?

If you just simply put it, an air purifier is an air cleaning machine. It blocks all the contaminants from the air making the air breathable while improving the indoor air quality.

Air purifiers are also medically preferred as they’re known to reduce allergy symptoms, asthma and other breathing abnormalities. It even improves your sleep and makes it easier for you to breathe; basically, improves the living standard.

Contrary to the popular believe that an air purifier is only needed if you live in polluted city is wrong, you will need it anyway if you wish breathe fresh air. The fact is, the air all over the globe is polluted. The level of pollution differs from city to city. But it is polluted.

Whenever you open the door or windows of your house that polluted gets inside your house and gets trapped. Those dust particles also gets stuck on our clothes resulting us breathing in such polluted air even inside our house.

Even without the outside influence, there are a lot of indoor pollutants making the air inside the house, tainted- starting from furniture materials, paint, cleaning products, pet dander, mold and even more.

So, just because you live in a certified clean city does not mean that you actually don’t need an air purifier.  It is a great investment for every home regardless of your address.

Before you try to purchase an air cleanser or a purifier, read the issues listed below. A few of them may sound very familiar and it will help you choose the perfect device.

Do you experience any of these?

  • Are you facing seasonal allergy symptoms or possible related to pet dander?
  • Are there anything around your house that is causing your asthma symptoms to flare up, but sadly you are unable to figure out the source?
  • Is there a renovation work going on in your house, and all those dust and paint fumes are nauseating you?
  • Are you prone to cold?
  • Do you just want to disinfect your home by killing all the bacteria and viruses?
  • Do you have any pets who are shedding dander or source of any odor?
  • Do you want to get rid of tobacco smell or any sort of smell?


How to select the Best Air-Purifier for your Home?

Now that you are aware of how important is an air-purifier, what pollutants do they fight, the filter types and their certifications we can further proceed to select the right type of air-purifier that will serve your purpose.

1. Air-filters according to individual requirements

  • Purifier to deal with allergies-if you are suffering with allergies then you should purchase an air purifier that is equipped with a per-filter and a proper HEPA filter. This is the top combination of filters that is capable of trapping all the allergens found in the air such as pollen, duct, pet dander and even mold spores.
  • Purifier to fight molds-first of all, it is a terrible news if you have mold in your house. But in order to deal with that you should get a purifier that is equipped with the combo of a true HEPA filter, ultra Violet Light and an Activated Carbon filter.

The True HEPA filter traps the mold spores then the UV ray completely destroys the mold DNA and finally, the activated carbon filter eliminated the odor the mold. 

  • Purifier to eliminate pet hair– if you are riddled with pet dander and want to get rid of them, then you should buy an air purifier that is equipped with a True HEPA filter or a HEPA type filter. The size of a pet dander is just 50 micron and these HEPA filters are capable of catching particles that are as small as 0.3 to 2 microns.
  • Air purifier for smoke- if you are bothered with smoke then you must get an air purifier with a True HEPA filter and Activated Carbon filter. The true HEPA filters are known to capture 99.97% of smoke particles and the activated carbon filters removes the odor.
  • Purifiers to eliminate germs– you need to purchase an air purifier equipped with a germicidal UV-C light. This specific UD light is capable of killing viruses and it also destroys their DNA structure. But you can also get a HEPA filter; they are second best as they are only able to trap the viruses and stops them from entering the air again.

2. Choosing the right Size Air Purifier

Another important thong to consider is the size of the purifier which is most of the times neglected by the consumers. But you need to know which purifier is the best for your home and for your health.

First, you need to check the square footage rating on the packaging, and then you need to compare it to the size room where it will be placed.

If the square footage rating of the purifier is equal or greater than the size of the room then it was definitely an excellent choice by you.

But, here’s the proper way to measure it;

You will need the measurement like the width and length of the room in feet and if you multiply them, you will achieve the total square footage.

So, the calculation is; 10′ x 20′ room = 200 sq. ft.

If you have multiple connected rooms, such as a living and dining room and a kitchen, then you have to make additional calculations. You just have to add up the total area in square foot.

So, the calculation is; 10′ x 20′ living room = 200 sq. ft., 10′ x 10′ dining room = 100 sq. ft., and finally, 15′ x 20′ kitchen = 300 sq. ft. The together you will get (200 + 100 + 300) equals 600 sq. ft.

So, after completing the calculation you need to know the minimum sq. ft rating of the purifier in order to learn its efficiency.

3. ACH and CADR ratings

Well, you are trying to purchase an air purifiers so you will most definitely come across two of the very common and specific ratings;

  • ACH
  • CADR

Air Changes Per Hour or ACH

The ACH rating is most of the times it is ignored by the customers as they are unable to understand it. Unfortunately, this particular rating tells the customers the efficiency of the air purifiers.

The ACH rating stand for the rate of exchanged air in the room by the purifier every hour. The rating includes 4X, 5X or 6X denominations.  5X means that the polluted air in that particular space gets trapped and then recycled within 5 hour interval. The higher the number, greater the efficiency of the purifier!

You also need to know that this rating is directly linked to the max sq. ft the purifier can handle. So, if the purifier has a 5X rating and specified that it can cover 300 sq. ft. specified efficiency.

Clean Air Deliver Rate or CADR

This is the second we mentioned. It was developed by the Association of Home Appliances Manufactures in order inform the potential customers about how capable is the air purifier to clean the air inside a particular room.

The objective was to provide a standard which will help the customers to equate the effectiveness of a particular device. This rating is even more important due to the fact that we usually compare two or more purifiers against each other before getting one.

The CADR rating mainly provides us with an honest assessment regarding the capacity of the air purifier. Duet, Tobacco Smoke and Pollen; these are the three types of pollutions measured by the CADR rating.

If the number is high then the efficiency of the purifier is also higher.

4. Portable, Whole house or Commercial Use?

There are several varieties of air purifiers found in the market. Some of them cleans air by removing dust particles, molds and other allergens. So, we have compiles a list of our own of different type of air purifiers.

  • Portable Air Purifiers

These are also called room air purifiers. It does not need any heating or a cooling system. Best suited for bedrooms and they are also very cheap but their efficiency is amazing.

  • Whole-house Air Purifiers

You can also go with the whole-house purifiers. These purifiers are usually gets attached to a heating or a cooling system. They are capable of clearing big rooms and clearing allergy related issues.

  • Commercial Air Purifiers

These purifiers are capable of removing a large number of contaminants from the air compared to standard air purifiers. So, if you are using a commercial purifier you must have to use it in a big room or for a long hallway.

Such systems come with PCO and HEPA filter for protection against any type of harmful bacteria, chemicals and viruses.

5. Air Purifier Features You Need to Look

Here, we are going to tell you what you should look for while purchasing an air purifier. If you compare two or more machines together you will find that there is a wide variety if you include the additional features and customized upgrades.

So, some of these features will cause some extra buck and learning all these things will definitely help you to purchase the best product suitable to your need.

Here are the features you need to look for in an air purifier;

  • Pre-filter

These type of filters are capable of trapping the largest particles in the air. So, if this one is attached as an additional filter to your purifier, it will increase the lifecycle of the inner filter significantly. The Pre-filters are also very cheap and they are washable.

  • Digital Controls

The digital control will allow you to control and manipulate the settings of the purifier more precisely.

  • Adjustable Fan Speeds

Most purifiers come with a fan speed settings of 2 to5. The highest and the lowest range exist somewhere between them. Some purifiers are also equipped with turbo speed to accelerate the cleaning process.

  • Filter Replacement Indicators

Some filters are equipped with indicator that informs you when it is the right time to replace the filters. It simply means the filters are filled with pollutants; you need to change or wash them in order to make them work perfectly.

  • Programmable Timer

The automatic turn off feature is available with almost every purifiers, these days. It simply helps to same electricity.

  • Carrying Handle

The carrying handles make the transportation of the purifier very efficient. It is a very heavy device so the addition of a handle is preferable.

  • Casters

Works more like the handles, the casters are a set of wheel mounted below the purifier making it easier to move.

  • Antimicrobial Treatment

This is a type of coating found on purifiers. It helps on preventing the spread of bacteria and microorganisms on internal filters, resulting an increase in the lifespan of the filter.

  • Air Quality Sensors

This sort of sensors are capable of monitoring the air, they look for specific pollutants and then adjusts the in order to remove those particles immediately.

  • PlasmaWave Technology

An alternate method of ionizing the air! So, that it does not emit negative ions or worse produce ozone. This technology uses water vapour to achieve the same results.

  • Photocatalytic Oxidation (PCO)

A very advance filtering process, equips the filters with UV Light in order to completely destroy the chemicals or other volatile organic compounds; even bacteria, mold and fungi.

  • Nightlight

This light helps to locate the purifier inside a dark room.

  • Remote Control

If you have this, then you will be able to operate the purifier from a significant distance.

  • Mobile App

This is the age of app. They are almost everywhere, capable of doing anything. So, the addition of app will provide you with the full access of the purifier via your cell phone.

 6. Other Considerable Points

This is the final stage of making the decision, which air purifier to get for your home. But there are some additional points to consider before you get to do that.

  • Cost of Maintenance

If you simply maintain the purifier properly then they will work most efficiently. So, before getting the purifier make sure you know how much it will cost to keep it running smoothly.

The purifiers that are equipped with HEPA or Carbon filters needs replacing frequently. These filters trap the particles so eventually they get clogged up when they can’t clean the air anymore. 

The HEPA or Carbon last about a year before they need replacing. So, find out the replacement cost. If you get the ionic air purifier you don’t have to worry about the maintenance. As these machines are equipped with a type of electrostatic collection filter to collect pollutant particles from the air, but these filter are washable and reusable.

  • The Noise Level

If you get an air purifier equipped with a HEPA or a Carbon filter then you will see that those purifiers come with a fan. This fan sucks the air into the filter and then forces the clean air back into the room. Sometimes, it may feel like that these fans are making too much noise.

But if you reduce the fan speed then the noise level will also be reduced.

Generally, purifiers have only two speeds; high and low but there are few that are equipped with close to 5 type of speed like low, medium, high, turbo and automatic.

So, the noise level is a very important factor. If you are going to be using it in the bedroom, high level of noise will make the air clean but it will not let you sleep well.

So, go for a purifier that is properly sized for your preferred room. If it is too small then it will work too hard and the noise will be higher. As it will be operating at its highest setting!

But the ionic purifiers do not use filters and it also means that they don’t use fans. So, these types of filters are the best choice if you are looking for a low noise purifier. 

  • Consumption of Energy

Similar to other appliance in your home air purifiers will be plugged to your wall and will be running on electricity. As they require to run 24/7 for maximum efficiency, you need to consider the amount of energy it will require. Generally, the purifiers use 50-200 watts of power. But we would recommend to get a device with Energy Star rating. It ensures that the power consumption will be low.

  • Manufacturer

There are several manufacturers all over the world know for designing air purifiers for homes. Sadly, not all of them provide high-quality machinery. So, if you are getting a purifier, it is important to know the manufacturer. Just select a manufacturer with good background and reputation.

  • Warranty

Another thing you need to look for before purchasing the purifier is the warranty. It will help you to avoid any issues in the long run. Just learn what are covered and for how much time, if they turn out to be defective.

You need to remember that the air purifiers are a long term investment; it is not something that you can purchase every other month. And obviously no one wants a product that faulty but still this is an electronic product, you don’t know what’s going to happen until it happens. So, a valid warranty is important to protect the repair or the replacement costs in case it turns out faulty.

What are the variations of Air Purifier Filters?

There are different variations of air purifier filters available; each one is dedicated to eliminate a particular type of pollutant. So, before you purchase them know how many types of filters are available and what is their target pollutant?

Needless to say, each variation of the filters has their strengths and weaknesses which is why the modern purifiers are equipped with two or more type filters in a single unit.

1. HEPA Filtration (High Efficiency Particulate Air)

This type of filtration process is considered the highest level of purification process. The U.S HEPA standard was developed long ago by the Atomic Energy Commission. Their goal was to capture the radioactive dust particles.

There is a variation of it, name the True HEPA Filter, they are known to remove more than 99.97% of all the microscopic particles, even if they are as small as 0.3 microns. So, these types of filters can allow only the very small particles to pass by thereby, allergens like pollen or pet dander or mold spores or even dust particles will be eliminated.

You will find several filters in the market that carries the name HEPA but not all of them are equipped for such delicate work. You need to look for the certification or the label that says “True HEPA Filter”.

There are also other filters in the market that uses the terms like “HEPA-type” or “HEPA-like”, you should know that these filters are not true HEPA. These are inferior filters capable of blocking particles sized 2-5 microns.

Sadly, all the HEPA filter are not created equally. Here the size matters, the more square footage in a HEPA filter the more number of particles it will be able to remove. The size, material and even the manufacture all varies and plays a key role into it performance.

This is probably the main reason why one HEPA filter is more expensive than the other. So, when you are getting a HEPA filter you need to look for the HEPA label specifically.

Pollutants removed – pollens, mold, dust, pet dander, hair, and even smoke.


  • Top certified filters
  • Trap all type of particles of very small size and does not let them release into the air
  • It is suitable for different respiratory issues


  • Requires regular maintenance and replacement for maximum effectiveness
  • Most expensive filtration system
  • Incapable of removing odours and chemical fumes
  • It employs a fan in order to suck in the air at the highest rate which can be very noisy

2. Carbon Filtration

Another variation of air filters is called the Activated Carbon Filters. These sort of filters are not really used alone to purify the air, it is a very rare occurrence. Usually, they are accompanied by other filters. These activated carbon filters excels at eliminating or absorbing irritating odours. They are also capable of neutralizing smoke, chemicals, and fumes.

The activated carbon filters use a very specific form of carbon containing millions of very tiny pores, these pores are very absorbent. As it consists of so many pores, the surface area is exceptionally large which inherently traps all the fumes, gases and odours.

You may not know this but if you simply treat carbon with oxygen, millions of pores will be opened on it. These are very small microscopic pores which make the surface area of the carbon very large. Thus a single pound of activated carbon has a surface area of 60 to 150 acres.

As it has such large surface area, it is best suited for absorbing gases and odours. That generous surface area is just perfect for bonding with molecules of chemical or vapour. When the carbon filter is larger, then the amount of chemicals absorbed by it will be higher and it will also be able to work for an extended period of time. After it is full, it will no longer be able to absorb chemicals and then you have to replace it.

Unfortunately, this activated carbon filter can’t be used to trap particles which are causing you allergies or asthma or any irritation in general. But it can get rid of smells, effectively. Basically, if you use these filters your room will smell fresh and clean. And this is the main reason, why activated carbon filters aren’t used alone; they are accompanied by another filter.

Pollutants removed – chemical and gas fumes, odours, smells originating from pets, cooking, smoke and smell of paint and the smell from cleaning products


  • Helps to keep a room fresh
  • Compared to other filters it is cheaper
  • Effective for people living in industrial areas


  • Only useful for removing gaseous fumes, smells and odours from the room, there are no other applications

3. Ionic Filtration

This is a completely different type of filtration system. This type of filter emits a charged cloud of in the air, the ions present inside the cloud get attached to the impurities present in the air and it forces them to cling to the nearby surface.

One of the main disadvantages of this sort of filters is the dirty spot. If you keep the ion generator close to a wall or on the floor, it will create spots covered with dirt.

As it does not eliminate the impurities, it forces them to get attached to a surface. But this process is also capable of eliminating ultra-fine particles sizes as small as 0.01 microns.

A few ionic air purifiers are equipped with an electrostatic collection plate. This plate attracts the fallen particles in order to remove them from the room.

Pollutants removed -dust, pollen, mold spores, volatile organic compounds, fungi, different bacteria’s and viruses, also visible smoke.  


  • This filter is practically maintenance free; you don’t need to replace it.
  • It is lot cheaper
  • Noise free.


  • Pollutants stays in the room cling to the surfaces. Unless you have an electrostatic plate or a collection plate you can’t remove them.
  • Needs cleaning very frequently
  • It is not capable of eliminating odours
  • Produce small amount of ozone as the by-product which is not really good for health

4. Ultra Violet or UV Light

This is unlike any other filtration system we have mentioned before. There is actually a UV lamp inside the purifier. It emits an invisible light that contains UV light. This light attacks the pollutants as they are passing through the filter.

The bulb is of 20 watt and it emits UV that kills pathogens, germs, and microbes. It is also certified by California Air Resource Board, making the process ozone free.

The UV light is contained inside the air purifier; it is not released into the room. This an air purifier technology that uses the UV-C band of the Ultra Violet Spectrum.  You may not know this but this particular band of UV is perfectly safe for us there aren’t any side effects

This sort of setup, like air purifiers equipped with UV filters is generally used inside the hospitals, in order to keep the environment sterile. They can also be used in the kitchens, laboratories or even at the day-care centres. If you have the tendency to get sick very often then you need this air purifier equipped with a germicidal filter or UV lamp may. It will boost your immunity.

The main work of the UV ray is to completely destroy the bacteria and viruses at the molecular level. What you are getting is a pretty good sterile environment with clean air.

Pollutants removed– all sort of micro-organisms as bacteria, viruses, germs.


  • These filters are capable of lasting for thousands of hours and rarely requires replacement
  • Creates a sterile environment, cuts down the number of germs inside your room

Disadvantages of Ultra Violet Light Filters

  • It is capable of only killing the viruses, bacteria and germs. So, this filter can’t be bought as a standalone device.
  • Mostly comes as an attachment with a HEPA or an Ionic air purifier

5. Ozone

This is a completely different type of air purification system and it is not good for health. This type of purifier manufacturers Ozone gas intentionally. Although, there are article and statements which are made to make you believe that these devices are safe for public use but they are not, actually.

Several health professionals have spoken against such claims and they have stated that there are no such agencies authorized by the federal government to manufacture such devices. If you get exposed to ozone, it may aggravate your asthma symptoms and if you consume it in high levels then it is sufficient enough to create scars your lungs.

Sadly, there are still different brands Ozone air purifiers available in the market and the amount of Ozone produced by them obviously varies but you also have to know that there are several chemicals we use every day that reacts to ozone. Several studies have shown that the ozone air purifiers help in the growth of a few specific biological agents. It is also impossible for it to clean the in such low concentrations.   

Stay away from Ozone Purifiers This air purification is extremely dangerous.

It can cause lung tissue damage, not safe to use in the closed confinements of a room. These purifiers are also restricted in the State of California. So, just remember these points, next time you go to purchase an air purifier

What are the Most Common Source of Household Air Pollutants?

You have to remember that different purifiers are designed to tackle different type of pollutants. So, it is imminent to identify the type of pollutants that is currently polluting your air, before you finally purchase an air purifier.

  • Allergens- in the list of airborne particles you will find pollutants like pet dander, mold spores, dust mite allergen, plant spores, fungi and pollen. These are identified as the most common source of allergy and asthma attacks in every household.
  • Smokes-the smoke of tobacco or weed can be very irritating for non-smokers and it is one of the most common causes of indoor air pollution.
  • Odours-the odours inside the house are a big problem. It includes the smell of gasses, kitty litter, various toxins, and gaseous pollutants like indoor pesticides, aerosols, and chemical cleaners. Such type of pollutants is very common and hard to eliminate.
  • The VOCs- VOCs or Volatile Organic Compounds are available in most in most of the common household products such as; paints, varnishes, cleaning supplies, disinfectants, glues and adhesives, and even new carpets and building supplies are not excluded. You need to find the components like benzene, chloride, formaldehyde, ethylene, and toluene. The Volatile Organic Compounds can cause several symptoms like the irritation of the eyes, nose, and throat, headaches, nausea, and even severe chronic health conditions such as damage to the nervous system. It can also aggravate asthma.
  • The micro-organisms- such category includes antigens, pathogens, bacteria, and obviously viruses. These are the most common germs that make us sick. These also include mold, fungi and protozoa other microscopic plant bodies causing several health issues.


All these pollutants are considered dangerous. They can damage your health, and it does not matter if you have a very specific type of allergy, they will cause damage and even aggravate your respiratory issues. The only difference is that the people who are directly affected by these elements are able to notice the effects almost immediately but those who are not allergic to such contaminants won’t be able to notice the changes immediately, resulting serious health damage in the long run.

Frequently Asked Questions?

1. How much space does it take?  

Well, not to worry, the Air Purifiers are designed to fit into any large or small spaces. All you have to do is to measure the square footage of the area of the room where it will be used. After that you just have to contemplate the CFM and ACH needs. Usually, the manufacturers provide a suggested area or the size of the room to get the best results according to your chosen model of purifier.

2. Are they safe to use?

We can assure you that air purifiers are a safe piece of machinery you can use it in your house without any worry. But there is an exception to this statement, there are purifiers known as ozone producing air purifiers. Such purifiers can cause irritation, allergies, aggravate your respiratory problems, chest pain, cough and even severe lung damage.
The HEPA purifiers are very popular and they are ozone free. You can also use ionic air purifiers and never get confused with ozone air cleaners.

3. Where do I place my Air Purifier?

Usually, most of the air purifiers available in the market are designed to clean only a single room. So, we would suggest that you keep it in a room where you spend most of your time, in most cases it is the bedroom. Although, if you have a home office or any other room where you spend most of your time, you can place it there.
So, the priority varies from customer to customer. Hence, it will be best to purchase an air purifier equipped with wheel at the bottom. Then, you will be able to move is easily from room to room as needed.

4. How often do I need to use it?

As per the instructions provided by the manufacturers, you will need to use it continuously throughout the day.
But when you first turn it on, you should set it at the highest settings, then after a few hours you should change it to automatic. The purifier will adjust.
But once you are sure that the air at that specific location has been purified you can change it to the lowest setting, even then the air space will be cleaned.

5. How many purifiers do I need?

Usually, you only require one or two purifiers in your house. The most ideal way is to get one for the living room and one for the bedroom as these are most used places inside any house.
Unfortunately, air purifiers are not designed to clear the air between two rooms. They are not that powerful. Still, if you have such space in your house, you need to get one purifier for each room, only then you will get good results.

6. How would I know that it’s time to change the filters?

Most of the purifiers come with an indicator light which alerts you if it’s time to change the filters. Unfortunately, not all the purifiers comes with such convenient feature. If you have such device in your house, you need to check the manual to find out the recommended time of effectiveness for the filters. If that time has passed, you will have to change the filters. The time of filter change varies between three months to a year.

7. Is it difficult to change the filter of the air purifiers?

Most people think that it will be very difficult to change the filter of an air purifier whereas it is quite simple. If you simply remove the front plate of the purifier then the filter will be visible to you. But there are also other purifiers that features a filter at the side or at the backside of the purifier.
Fortunately, for you either of the variations does not require any special tool or skill to change the filter. If you are still having problems, read the instruction manual, provided with the purifier.

8. Should I leave the windows open when I am using my air purifier?

The machines like air purifiers are designed to operate in a closed room, for maximum efficiency.
The air purifier eliminates all the harmful contaminants from the air like dust particles, pet dander, bacteria etc. making the air breathable for you. Unfortunately, if you open the windows of the room, the contaminated air from the outside will get mixed with the purified air inside your room. The purifier will continue purifying the air as long as there are impurities in the air but ultimately you are not getting to breathe the clean air.
So, never ever leave your doors or windows open. Besides the above issue it will also put immense pressure on the purifier

9. How to clean an air purifier?

The clean-up of an air purifier is extremely easy. If you are still having problems then read the instructions below;
As you are using an electronic device, you need to unplug the power cord, first.
After that, take a clean cloth and wipe clean the outer exterior of the casing.
Now, remove the cover of the filter.
Remove the filter and then wash them using soap and water. Dry them out.
Then, put those washed filters back into their place.
Attach the external cover and plug in.
And it’s done!

10. Can they cause Sore Throat?

No, there is no air purifier known to have caused sore throat. If you must know, the usual cause of sore throat is bacteria and viruses, and air purifiers are known to help preventing sore throat by eliminating their presence from the air. 

11. Are they capable of removing Asbestos?

Yes, the air purifiers are capable for removing asbestos but you need to purchase a specific one which must be equipped with a HEPA filter. The size of an Asbestos particle ranges from 0.7 to 910 microns and HEPA filter are capable of removing 99% of them. 

12. Can it help with COPD?

Yes, an air purifier can help with COPD by making it easier for the people with COPD to breathe by simply destroying the airborne pollutants that causes lung irritation. But the purifier must be equipped with a HEPA filter and never ever get an ionizer as the ions may trigger COPD exacerbations.

Conclusion :

The air purifier is an essential buy for every modern urban household. The pollution in the city has reached dangerous levels, and the need to allow our children breathe clean air is apparent and it is extremely necessary.

So, if you are looking to buy one you have already made a great decision. Our top recommendation on this list is the powerful Mi Air Purifier 2S (White). An average sized room can be easily purified with this air purifier. With a commendable CADR value of 310 m3/hr, it claims it can cover a 400 sq.ft room. H11-grade filtration technology and that lightweight build also make this product very desirable. Priced competitively being an Mi product, it also comes with a 1 year warranty. Overall, as you can see, this particular air purifier is an all rounder in every way.

There are more air purifiers with their own unique features and capabilities. It might suit you better, thus we highly recommend you to go through our entire list before going for the purchase.

Let us know your thoughts in the comment section below!

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