7 Best Air Purifier in India: 2020 Reviews & Buying Guide

According to Indian Journal of Community Medicines, indoor air quality is 10 times worse than outdoor air quality.Gases emitted by stoves, household appliances, perfumes, and poor ventilation are some of the sources of poor indoor air quality.

Air purifiers is the best way to improve the air quality inside your home or office.They contain single or combination of filters which efficiently trap the pollutants, odors and other harmful impurities present in the air.

How to choose an air purifier?

This depends on several factors like…

  • Filter Type: Some of the common types of filters present in air purifiers are – HEPA (for dust), activated carbon (for odors and gases), and UV (for bacteria). Some of the appliances also come with a combination of 2 or 3 types of filters. You can choose according to your requirements.
  • CADR: It represents clean air delivery rate. This metric has to be at least 300 or above for effective performance.
  • ACH: (air changes per hour) A good air purifier has 6 ACH rating. For people with asthma or other respiratory issues, ACH rating of 6 to 8 is recommended.

Other notable factors to consider are room size, appropriate placement, maintenance costs and energy consumption. You can go through our “Buying Guide” for a clear and detail explanation of these factors. We have also shortlist Best Air Purifiers in India after 50 hours of analysis, reviewing, researching and testing.

Best Air Purifier for Home in India


Best Air PurifierNo'of FiltersCDARCoverage Area WeightWarrantyBuy Now
Mi 2S Air Purifier3250 m3/hr300 sqft4.8 Kg1 year Check the Price
Philips 3000 Series AC3256/20 Air Purifier2376 m3/hr818 sqft.9.82 Kg2 years Check the Price
Honeywell HAC25M1201W Air Purifier 3250 m3/hr323 sqftN.A1 year Check the Price
Coway Sleek Pro AP-0509 Air Purifier3216 m3/hr255 sqft5.9 Kg3 years Check the Price
Dyson Wifi-Enabled Air Purifier2250 m3/hr300 sqft6.65 Kg2 years Check the Price
Hindware Moonbow AP-A8400UIN Air Purifier6180 m3/hr350 sqft.4.8Kg1 year Check the Price
Tefal Intense Pure Air Purifier5215 m3/hr400 sqft4.2 Kg1 year Check the Price

7 Best Air Purifier Brand Reviews in India 2020

1. Mi 2S Air Purifier

mi-air-purifires-1Though Mi brand has hit the Indian market few years ago, it has impressed the consumers with its quality, durable, and cost effective products. And Mi Air Purifier 2 S is no different – as it is equipped with powerful filtration system, auto-adjust brightness and several other beneficial factors.

The main reasons for why we choose this product first are – cost effective and powerful three-layer filtration system. The outer layer is designed to remove large air borne particles like hair, dust and others. The second (middle) layer removes micron-sized particles and harmful bacteria.

The innermost layer has activated carbon which is capable of effectively removing formaldehyde, odors and other harmful substances. With smart phone connectivity, you can change the modes, see the temperature and humidity of the room. It also notifies when the filter needs to be changed.

Other Notable Features                                             

  • Speed Modes: Auto, Night and Manual
  • CADR: 310 m3/hr
  • Suitable for: 400sqft room
  • Safety Features: Auto-turn off
  • Dimensions: 24 x 24 x 52 cm
  • Filter Replacement: once in 6 months
  • Power Consumption: 29 Watts
  • Control: Remote or Mobile App
  • Noise Levels: Quite

Warranty 1-year

warranty is provided by the manufacturer. Previously there are was only online service, but MI brand has opened several stores, where you can get the repairs or replacements. You can chat the MI support team on their website.


  • Scientifically designed and efficient 3-layer filter
  • Displays AQI
  • OLED display
  • Smart control and monitoring feature
  • Budget-friendly
  • Quite and energy efficient
  • Has sleep mode
  • Allergen and odor free air


  • Short power cable
  • Manual mode can be noisy
  • Higher filter replacement cost

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2. Philips 3000 Series AC3256/20 Air Purifier

Philips-air-purifires-1Philips is one of the most trusted brands across the world. Philips AC3256/20 AeraSense air purifier is perfect for people who have respiratory issues like asthma. With AeraSense technology this product can detect 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.

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.

Other Notable Features

  • Speed Modes: 5 settings
  • CADR: 376 m3/hr
  • Suitable for: 818 sqft room
  • Dimensions: 47.4 x 34 x 79.8 cm
  • Safety Feature: child-lock
  • Special Features: dedicated allergen mode and ultra-silent sleep mode
  • Filter Replacement: once in 9 months to 3 years
  • Power Consumption: 60 Watts
  • Control: Remote
  • Noise Levels: 49db
  • Weight: 9.82 Kg


The product comes with 2-years warranty and a filter life that lasts between 9 months to 3 years, which is pretty decent. For any issues related to air purifiers, you can call the customer service on 1800 103 1235. As per the customer reviews, they have experienced the air quality difference after using it for just few hours. Symptoms of respiratory issues like asthma have reduced to maximum extent. Apart from that, sleep quality has also improved drastically.


  • Nano Protect HEPA Filter
  • Durable filters
  • 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


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

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3. Honeywell HAC25M1201W Air Purifier

Honeywell-air-purifires-1The quality and performance of Honeywell products are par excellence. The HAC25M1201W air purifier model is nothing less. It is a certified product by the ECARF for its superb air quality by removing microscopic allergens from the air.

The reasons we chose this air purifier to be on our list 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. This unit is suitable if you do not stay in an extremely polluted city.

Other Notable Features

  • Speed Modes: 5 settings
  • CADR: 250 m3/hr
  • Suitable for: 323 sqft room
  • Display: LED touch
  • Safety Feature: child lock
  • Filter Replacement: once in 9 months to 1 years
  • Power Consumption: 60 Watts
  • Color Indicator: blue for good quality, orange for medium quality, and red for poor air


Honeywell manufacturers have provided 1-year warranty on this product. For electrical product related enquires, you can contact the customer service on 1800 103 3848. They have extended customers service network in 25 cities. As per customers you have used this product for months have mentioned that asthma triggers have reduced and experienced better breathing.


  • 3000 hours filter life
  • Multi-modes and fan speed
  • Child lock feature
  • Stylish and compact
  • 3D air flow
  • Certifications like no other
  • Powerful air cleaning in 10 minutes


  • 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

Buy Now at Amazon

4. Coway Sleek Pro AP-0509 Air Purifier

Coway-Sleek-air-purifires-1Coway is a Korean brand with a legacy in making home appliances that are efficient and durable. The Coway Sleek Pro AP-0509 air purifier comes fitted with a 3-layer HEPA 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.

Other Notable Features

  • Speed Modes: 1 level, 2 level, 3 level
  • CADR: 216 m3/hr
  • Suitable for: 255 sqft room
  • Dimensions: 312 x 575 x 198 mm
  • Filter Replacement: once in 4 to 6 years
  • Power Consumption: 44 Watts
  • Control: Remote
  • Noise Levels: 44db
  • Weight: 5.9 Kg


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. For more information, you can call on 1800 102 6960. According to customer reviews, customer service is by far the best in the market. They are friendly, proactive and transparent.


  • True HEPA filtration technology
  • Compact design and stylish looks
  • Low power consumption
  • Good customer care support
  • Automatic airflow control
  • One-touch air speed control
  • Silent operation


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

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5. Dyson Wifi-Enabled Air Purifier

dyson-air-purifiresSince its inception in 1991, Dyson brand has been providing several household appliances like vacuum cleaners, air purifiers, hand dryers, heaters and several others. The quality, innovative design and performance of their products are exceptional. The cool link tower air purifier of Dyson is capable of filtering 99.95% harmful pollutants (0.1 microns) through vacuum-sealed glass and lower face velocity HEPA filter.

Its air multiplier technology provides powerful air projection. The oscillation feature helps to circulate purified air throughout the room. Dyson Pure Cool Link Tower Air purifier can sense the air pollution rate, love air quality and room temperature. This information is presented on LCD screen and its mobile App.

Other Notable Features

  • Settings: 10 air speed settings, Sleep Mode, Auto Mode
  • CADR: 250 m3/hr
  • Suitable for:300 sqft room
  • Display: LCD screen
  • Filter Replacement: once in 9 months to 1 years
  • Power Consumption: 40 Watts
  • Control Type: Remote


2-years warranty is provided by the manufacturer. Free installation is also provided by the manufacturer. For availing warranty or free installation or any other support, contact us on 18002586688.


  • Automatically removes 99.95% pollutants
  • Air multiplier technology
  • Vacuum sealed 360 degrees glass HEPA filter
  • Small foot print
  • Certified by Asthma & Allergy Foundation of America
  • Advanced sensors


  • Expensive
  • Not effective in high humidity areas

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6. Hindware Moonbow AP-A8400UIN Air Purifier

Hindware-air-purifiresSince few years back, Hindware has been expanded its products to home furnishings, appliances and others. Among them Moonbow AP-A8400UIN is one of the best air purifiers in their price range.

This product has 5 filters which include pre-filter, true HEPA filter, activated carbon filter, UV lamp, and refreshing energizers. This filtration process has the capability of eliminating 99.985% of pollutants as small as 0.3 microns.

Other Notable Features

  • CADR: 215 m3/hr
  • Suitable for: 400 sqft room
  • Dimensions: 312 x 575 x 198 mm
  • Filter Replacement: once in a year
  • Power Consumption: 55 Watts
  • Control: Remote
  • Noise Levels: 44db
  • Weight: 4.2 Kg


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.


  • Suitable for bedroom and living room
  • Value for money
  • Lightweight
  • Compact and portable
  • Easy to clean
  • Instruction manual


  • Customer service is not up to the mark

Buy Now at Amazon

7. Tefal Intense Pure Air Purifier

tefal-air-purifiresTefal is an International brand famous for its innovative and high performance products. As per the manufacturer Tefal Intense product is the only capable air purifier in permanently destroying carcinogenic formaldehyde along with filtering up to 99.97% pollutants.

This product has 4 filters that include – pre-filter, active carbon, HEPA and NanoCaptur filter. The fourth layer is capable of capturing carcinogenic formaldehyde and destroying them permanently by turning them into neutral molecules. Nanocaptur filter technology is approved by British Allergy Foundation.

Other Notable Features

  • Speed settings: 4
  • CADR: 215 m3/hr
  • Suitable for: 377 sqft room
  • Dimensions: 312 x 575 x 198 mm
  • Filter Replacement: once in a year
  • Power Consumption: 30 Watts
  • Noise Levels: 45db
  • Weight: 4.2 Kg


2-years manufacturer warranty and a detail instruction manual is provided. If you have any queries, contact on 1100201860-200-1232 or write to customercare.india@tefal.com.


  • 4-levels of filtration
  • Patented NanoCaptur technology
  • Only purifier capable of destroying carcinogenic formaldehyde
  • Approved by British Allergy Foundation
  • Also protected by 5 International patents
  • Can filter 99.95% of air pollutants


  • Having remote control would be beneficial

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Air Purifier Buying Guide

What is an Air Purifier?

It is a device specially developed to remove impurities present in the air. Some of these common impurities include smoke, dust, pet dander, and odors. According to some verified resources, indoor is 5 times more polluted than outdoor air. So, investing in an air purifier is not a luxury, but a necessity.

How Does an Air Purifier Work?

Usually, air purifier contains – filter (single or multiple) and fan (which sucks air in and out). When you switch on this device, air will initially move through the filter where impurities and pollutants are captured. Now the clean air will be pushed out through fan into the room. The filters used in air purifiers can be made up of either paper, fiber or mesh. Whatever might be the filter type, they have to be cleaned regularly to maintain the performance and efficiency. So, while purchasing an air purifier, you should not only consider initial price but also maintenance costs as well.

Things to Consider While Purchasing an Air Purifier

Several brands have introduced different air purifier models into the market. But not all purifiers are created equal, and some cheap quality products will not live up the requirements. Selecting an air purifier without proper knowledge is like finding a needle in the haystack. This is the reason, we crafted a buying guide for air purifier – it has all the information required to analyze the products and choose the right one as per your requirements.

1. Do I really need an air purifier?

This is the most important things to consider before purchasing or analyzing an air purifier. If you are experiencing any one of issues mentioned below, then investing on an air purifier is unavoidable.

  • Are you facing seasonal allergy symptoms or any other allergy related to pet dander?
  • Are you not able to figure out the source of your asthma symptoms or attacks?
  • Is there a renovation work going on in or around your house and all those dust and paint fumes 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?

If the answer for any/all of the above questions is yes, then purchasing an air purifier is a smart choice.

2. Understand your requirement

Every one of us have different requirements – some people may need air purifier a room or whole house and some people may require for their office. So, this is the second important factor to consider before purchasing an air purifier. Below, we have mentioned all the information related to different types of air purifiers. It helps you decide which one suits your requirements.

  • Portable Air Purifiers

Also known as room air purifiers, they are best suited for individual areas like bedrooms, kitchen, bathrooms, living room and such. As they don’t require any external heating or cooling system, you can easily move them from one place to another. Generally, they are turned on when people are present in the room.

However, they can be kept running all day long as well (depending on their capacity). Portable air purifiers come in varied sizes – some of them are small enough to place in cars while some of them are sufficient enough to place in large living rooms.

  • Whole-House Air Purifiers

Another option suitable for residential purpose is whole house air purification. Unlike portables ones, whole-house air purifiers are connected to a cooling or heating system. They work in conjunction with your HVAC system to run continuously. They are suitable for cleaning air large rooms and perfect for clearing out any allergy related issues.

When compared to others, you can observe the air quality improvement right ahead. They require much less maintenance, have separate power and long lasting filters. As they are connected to HVAC systems, they work very silent. They are capable of clearing up 99% of pollen, 98% of dust and 94% of viruses. They also extend the life of your HVAC as it will filter out the particles that interfere with the equipment.

  • Commercial Air Purifiers

As the name suggests, these are perfect for commercial spaces like offices, lounges, long hallway and others. They are capable of removing large amount of contaminants (99.99%) than a standard air purifier. These air purifiers have PCO and HEPA filter which protect against any type of harmful bacterial, viruses and chemicals. Apart from that, it also removes odors and harmful gases in the air like fume extraction, tobacco smoke, dust, and others.

2. Air Purifier Filters

There are different types of air filters – which have their own capability range of filtering out the impurities in the air.. As different air purifier filters have different capabilities and weaknesses, some manufacturers have decided to combine 2 or 3 filters in single product for more efficiency. We have mentioned a detailed description of each product below for your reference – it helps you decide which filters suit your requirements.

  • High Efficiency Particulate Air Filter (HEPA)

HEPA filters are capable of removing 99.97% of impurities that are as small as 0.3 microns. Among the filter types, HEPA is the most popular one – as they are perfect for dealing with household air impurities like dust, dirt, animal dander, pollen, and others. And they don’t generate ozone or other harmful byproducts that harm your health.

However, HEPA is not good in eliminating bacteria, virus, odor, chemical fumes and other such. Foam, cotton, fiberglass are the materials used to make HEPA filters. The working principle of HEPA filters is – When air passes through the filter, particles will be trapped within the filters, releasing only purified air. Once the filter gets filled up, it may not be able to filter air any more.

So, you have to clean up the filter or change it once in a while. Some air purifiers have HEPA like or HEPA type filters, which are inferior to original HEPA and can trap only 2 – 5 micron impurities. If you want know the strength of the HEPA filter, then you have to check the MERV rating. The higher the rating is; the more efficient filtration will be. And you will require a higher HEPA filter if you are purchasing air purifier for a big room or large hallway.

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

Commonly used and top certified filtersNeeds regular maintenance and replacement of filters
Efficient in trapping small particles up to 0.5 micron

Expensive than others
Doesn’t release back the trapped impuritiesCannot remove odor, gases and fumes
Suitable for people with respiratory issuesHas a fan to suck in air, which is noisy
  • Activated Carbon Filters

These filters are rarely used alone in an air purifier; they are often combined with other filters to provide efficient results. Activated carbon filters have tiny pores and fissures which are efficient in absorbing gases, smoke, fumes, gases and chemicals. One pound of activated carbon has surface area of 60 – 150 acres which is suitable enough to filter air in a large area.

Higher the surface area is, more efficient the purification will be. Once the pollutants are captured, they will not be released back, so you don’t have to worry about recontamination. Air purifiers with activated carbon are helpful for people with MCS (Multiple Chemical Sensitivity) as they are capable of removing formaldehyde (that is commonly found in carpets, wood paneling, and upholstery).

Some perfumes can create unbreathable environment for babies, asthma patients, children and elderly – this can be solved by installing air purifiers with activated carbon air purifiers.

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

Can remove volatile compounds like gases, odors, fumes, smells, smoke and othersSuitable only for removing gases, fumers, odor, and nothing else. May be a bit large particles in the air like PM 2.5
Cheap to replace
best suited for asthma patients
Effective for people in industrial areas
Helps to keep the room fresh
  • UV Lamp

This type is perfect for eliminating germs, virus and bacteria. According to California Air Resource Board, 20Watt bulb has the capability of killing pathogens, microbes and germs. And moreover, this filter doesn’t create ozone as a byproduct of the process. Mostly, these air purifiers are used in hospitals, day cares, labs and kitchens.

However, if you live in a humid or moist environments, this air purifier can be a good investment. Though UV technology is perfect for getting rid of germs and bacteria, it has to be used in combination with a filter for more effective results. Without a filter, microorganisms can get masked up by impurities. Most of the air purifiers with UV technology have HEPA and activated carbon filter for air purification process.

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

Capable of lasting thousands of hoursIt cannot be bough standalone device as it cannot remove pollutants like dust, pollen and others
Rarely needs a replacementComes with in combination with air purifier filter
provides sterile environment
  • Ionic Air Purifiers or Ion Generators

This type of air filter generates charged ions (positive or negative) and release them into the surrounding environment. These ions attract airborne particles like dust, dirt, pollen and other impurities present in the air until they are too heavy to remain in the air. Once it is heavy, the ion will drop on the floor, window, furniture or wall.

When compared to other type of air purifier filters, ionic technology is least effective as it merely masks the impurities instead of disposing them. In some cases, they can get recirculated into the air again, contaminating the air again. However, this process is also capable of eliminating ultra-fine particles sizes as small as 0.01 microns. Ionic air purifier can deal with any kind of impurities other than smells and microbes. Some of models with ionic technology require regular cleaning and maintenance to work at full potential.

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

Maintenance free, doesn’t require costly repalcementsPollutants remain in the room clinging to the surfaces. You have to use an electro-static plate to remove them
Less expensive than HEPA filtersHas to be cleaned frequently
Noise free as it doesn’t use a fanNot capable of removing odors
Produces a small amount of ozone as by-product which can be an irritant for asthma
  • Ozone Generators

As the name implies, this air purifier produces ozone intentionally. Though some manufacturer state this technology is safe enough and effective in controlling indoor air pollution, health experts oppose them. Exposing to ozone on a regular basis can scar the lungs over time. And moreover they can be hazardous to people with respiratory issues, especially asthma.

Also ozone cannot remove dust particles in the air. They are usually best suited for commercial reasons and emergency purposes (like after the floods).

Air purifiers with ozone technology can pollute the air with ozone – which is harmful for children, elderly, people with asthma and other respiratory issues.

Important to Note: It is better to avoid purchasing air purifiers with ozone technology.

3. Room Size

This is the most important thing to consider before purchasing an air purifier. This factor helps you determine which purifier is efficient enough for your requirements. First thing, you have to do is – check the square foot rating of the air purifier (present on the packaging) and compare it to the room size you are placing it. If you want to know how to the right one for you beforehand, then read the below instructions…

  • For Single Room: Take the width and length measurements of the room. Multiply these two numbers (length and width), the result is the required square foot rating. Calculation example: 10’ x 20’ = 200 sqft
  • For Multiple Rooms: Some people may require air purifier for multiple rooms like dining, kitchen, bedroom and others. To know the appropriate square footage rating, you have to combine the area of all rooms.
  • Calculation example: Length x Breadth of each single room and added result of all the rooms. 20’ x 40’ of living room =200 sqft, 10’ x 10’ of bedroom = 100sqft (200 + 100 ) = 300 sqft

With these measurements, you can easily find out what will be the minimum square footage rating required to purify your room. 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.

Room Type CADR
Living Rooms (up to 400 Sq.ft) 250
Bedrooms (up to 300 Sq.ft) 140
For whole house 400

4. CADR (Clean Air Delivery Rate)

This factor represents the cleaning speed of a purifier for removing dust, pollen, smoke and other impurities present in the air. Before purchasing an air purifier, always check for the CADR rating. It has to be at least 300 or above for effective performance. If you want to determine CADR rating according to your room requirements, then divide your room square footage by 1.55. For example, if the room is 100 square foot, then divide it by 1.55 which results in 64.52 – it is the required CADR as per your requirement.

 5. ACH (Air Changes Per Hour)

This factor is really important if you or any family member is experiencing allergies or asthma. ACH refers to the number of times an air purifier can filter the entire volume of air in the treatment space each hour. For example, If the ACH rating is 6 then it capable of changing air 6 times in an hour. If you are having asthma or allergies, then having ACH of at least 4 is better, however 6 or 8 is more preferable.

  • 4 ACH Rating – is suitable for less polluted areas
  • 6 ACH Rating – is suitable for all types of rooms and people
  • 8 ACH Rating – is suitable for people with severe asthma or respiratory related issues

6. Placement Considerations

The area where you want to place the air purifier is also important as it adds value to the efficiency. Inside any room, make sure there is adequate space (18 inches or more) around the air purifier so that there is no disturbance or restriction of air flow. Most of the air purifiers intake air from all sides, so placing an air purifier against wall or furniture can reduce efficiency.

If you placing it in bedroom, then place it 6 – 10 feet away from the headboard and directional registers pointing towards the bed. This is the perfect place to place an air purifier in the bedroom as it is close enough to reach and far enough to avoid the feeling a draft. Below are some other considerations…

  • Air purifiers with HEPA or carbon filter: These products depend on fans inside them to suck the air and out. Placing them under the table, against wall, behind the couch or any other area which hinders the air circulation can affect the performance as well. The best area to place them is – 2 to 3 feet away from furniture and wall.
  • Air purifiers with Ionic filtration: They don’t depend on fans to suck the air in or out. These products actually depend on emitting ions in 360-degree angle. If you place them anywhere near the wall or furniture can hinder its total efficiency. The best area to place an air purifier with ionic filtration is center of the bedroom.

7. Filter Replacements

While purchasing air purifiers, make sure to check out their maintenance and filter replacement costs as well. If your device has two filter types, then you will have to replace them separately at different periods of time. Replacing filters regularly on time helps minimizes the wear on the motor. Life of the filter also depends on air quality and amount of usage. Air purifier with HEPA or carbon filter require regular filter replacements. They get clogged up and eventually cannot clean the air anymore.

If you are purchasing an air purifier with these filter types, then check the manufacturer recommendation on when to replace and how much does a replacement cost. Filters usually last from 3 months to 1-year long. If you are purchasing an ionic air cleaner, then you don’t have to worry anything about maintenance or replacement costs as they don’t have any degradable filter. Some ionizers have electrostatic collection filter to collect the impurities, but it is washable and reusable as well. So, this makes them cost-effective choice.

8. Energy Consumption

Air purifiers run continuously on electricity so you may have to consider power bills you may incur. To calculate the power, then just follow this thumb rule. On the package, you may get volts and amps of the air purifier you are purchasing and multiply these two.

For example: volts x amps = watts. To determine how much your air purifier uses per day, then multiply watt x hours and divide it by 1000. Generally, air purifiers use somewhere around 50 Watt to 200 Watt maximum. But we would recommend to get a device with Energy Star rating. It ensures that the power consumption will be low.

9. Noise Levels

Air purifiers equipped with a HEPA or a Carbon filter have fan to suck the air in and out. The fan is actually the main reason for the noise. Sometimes, it may feel like that air purifiers 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.

10. Additional Features

In this section, we are going to tell about some additional features to have in an air purifier. These features make using air purifier much more comfortable and user-friendly. But remember that, having some of these features can actually increase the cost of the device.

  • Pre-filter

This filter is 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 of the purifiers come with fan speed settings of 2 to 5, ranging from lowest to highest. 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 purifier 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 similar to 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

These 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 vapor 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

The addition of app will provide you with the full access of the purifier via your cell phone. It helps you monitor air quality data as well.

11. Brand Reputation

Reputation of brand, its customer service and consumer reviews should also play an important role in taking the right decision. Some manufacturers have a high reputation for their quality, performance and customer service. Sadly, not all of them provide high-quality machinery. So, make sure to choose carefully.

12. 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 will be purchasing 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.

13. Price of Air Purifier

Cost is one of the important factors, especially if you are budget constraint. If you want a cheap air purifier with good efficiency, then Tefla Intense Pure Air Purifier is the best choice. It has patented air filtration technology which can even destroy harmful carcinogenic formaldehyde present in the air. But it doesn’t come with any smart features like timer, air quality sensors, room temperature changes and others. If budget is not a constraint then you can go for Mi Purifier, Honeywell, Philips, Hindware and Dyson air purifier products. Apart from efficient air purifying technologies, these products have excellent smart features as well.

Benefits of Air Purifiers

  • It lets you breathe less contaminated or polluted air.
  • If you have respiratory issues like asthma, then air purifiers are helpful in keeping the allergens in the air at bay.

Drawbacks of Air Purifiers

  • Air purifiers with HEPA and activated carbon filters have fan which produces noise. Some people hate the noise but some actually like it.
  • Maintenance and Replacements costs are another major setback of air purifiers. Some require to be changed once in 2 months while some once in a year.

Other Ways to Improve Air Quality in my Home:

One of the best ways to address indoor air pollution is to find the source and properly ventilate the rooms. If you want to check if you can deal with indoor air pollution without air purifiers, then we recommend trying the below steps.

  • Keeping the windows open helps to prevent the irritants from getting trapped within the room. If possible, open windows on opposite sides of the room.
  • Vacuum your house regularly. It is better to choose a vacuum that has sealed bag and is HEPA certified because they are best in trapping the dust and don’t recirculate them into the air.
  • Always make sure to change the air filters regularly if you want to maintain the HVAC equipment and maximize the effectiveness.
  • It is better to install exhaust fan in the kitchen, bath and laundry areas. Switch it on before using the rooms. If it is the kitchen, the switch the exhaust fan on before preheating the oven or firing up the stoves.
  • Minimize the usage of candles, lighting wood fires, ban smoking, smoking inside the room. Reducing pollutants sources is sure shot to improve quality of air within the room.

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.


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 2S Air Purifier 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!